US5870523A — Recording medium on which a data containing navig…

Claim 1

Independent Claim 240 words

A recording medium with navigation data, comprising: a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flat indicating whether or not the data unit designated by each start address contains video data.

Claim 2

Dependent Claim 240 words

A recording medium with navigation data, comprising: a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flat indicating whether or not the data unit designated by each start address contains video data.

Claim 3

Dependent Claim 18 words

A recording medium according to claim 1, wherein said navigation pack contains address information indicating its own address.

Claim 4

Dependent Claim 26 words

A recording medium according to claim 1, wherein said navigation pack contains an end address for the data unit to which the navigation pack itself belongs.

Claim 5

Dependent Claim 40 words

A recording medium according to claim 1, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which a current angle of the scene to be reproduced is to be switched.

Claim 6

Dependent Claim 31 words

A recording medium according to claim 4, wherein said angle information contains an item describing no data unit related to an angle to which the current angle is to be switched.

Claim 7

Dependent Claim 33 words

A recording medium according to claim 4, wherein said angle information contains information indicating addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs.

Claim 8

Dependent Claim 32 words

A recording medium according to claim 4, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs.

Claim 9

Dependent Claim 27 words

A recording medium according to claim 1, wherein said navigation pack contains end address information indicating an end address of the data unit containing the navigation pack.

Claim 10

Dependent Claim 48 words

A recording medium according to claim 1, wherein, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored.

Claim 11

Dependent Claim 49 words

A recording medium according to claim 1, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronizing information on at least one of the audio data and sub-picture data reproduced in synchronization with the video data.

Claim 12

Dependent Claim 70 words

A recording medium according to claim 1, wherein said navigation pack contains reproduction information describing addresses of 15 data units to be reproduced before and addresses of 15 data units to be reproduced after a data unit to which said navigation pack belongs, and also describing addresses of 20th, 30th, 60th, 120th, and 240th data units, said data unit to which said navigation pack belongs being a 0th data unit.

Claim 13

Dependent Claim 100 words

The recording medium of claim 1, wherein: the navigation pack contains search information consecutively indicating the addresses of a specified number of data units to be searched for consecutively before and after the address of the navigation unit, and the data units are searched for with reference to the addresses, wherein the search information contains a flag indicating whether the data unit to be searched for contains video data, and a flag indicating whether there is video data in the data units between the address of the data unit to be searched for and the address of the navigation data.

Claim 14

Dependent Claim 43 words

A recording medium according to claim 1, wherein said recording medium contains a plurality of cell data items, where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item.

Claim 15

Dependent Claim 31 words

A recording medium according to claim 13, wherein said recording medium contains a table in which a playback program is written to define the playback sequence of said cell data items.

Claim 16

Dependent Claim 49 words

A recording medium according to claim 14, wherein said recording medium contains a table in which a plurality of programs are written defining the playback sequence of said cell data items and program chain information indicating a relationship between the plurality of programs and performing playback in various modes.

Claim 17

Independent Claim 246 words

A method of reproducing playback data containing navigation data, comprising: receiving playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least packs, wherein each data pack includes, a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the bead of the sequence, the navigation pack including a pack header, a first packet and a second packet the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; converting at least one of the data units into a playback signal with reference to the presentation control information and the data search information; and reproducing the playback signal.

Claim 18

Independent Claim 246 words

A method of reproducing playback data containing navigation data, comprising: receiving playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least packs, wherein each data pack includes, a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the bead of the sequence, the navigation pack including a pack header, a first packet and a second packet the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; converting at least one of the data units into a playback signal with reference to the presentation control information and the data search information; and reproducing the playback signal.

Claim 19

Dependent Claim 17 words

A method according to claim 16, wherein said navigation pack contains address information indicating its own address.

Claim 20

Dependent Claim 25 words

A method according to claim 16, wherein said navigation pack contains an end address for the data unit to which the navigation pack itself belongs.

Claim 21

Dependent Claim 56 words

A method according to claim 16, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which a current angle of the scene to be reproduced is to be switched, where the angle is switched with the reference to the address at the time of angle change.

Claim 22

Dependent Claim 30 words

A method according to claim 19, wherein said angle information contains an item describing no data unit related to an angle to which the current angle is to be switched.

Claim 23

Dependent Claim 50 words

A method according to claim 19, wherein said angle information contains information indicating addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs, where the data units are obtained with reference to the addresses and the playback signal undergoes rewind playback.

Claim 24

Dependent Claim 50 words

A method according to claim 19, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs, where the data units are obtained with reference to the addresses so that the playback signal undergoes fast-forward playback.

Claim 25

Dependent Claim 39 words

A method according to claim 16, wherein said navigation pack contains end address information indicating an end address of the data unit containing the navigation pack, and the next data unit is acquired with reference to the end address.

Claim 26

Dependent Claim 63 words

A method according to claim 16, wherein, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored, and the minimum data to reproduce the I picture is acquired with reference to the address.

Claim 27

Dependent Claim 74 words

A method according to claim 16, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronizing information on the at least one audio data and sub-picture data to be reproduced in synchronization with the video data, and at least one of the audio data and the sub-picture data, together with the video data, is reproduced with reference to the synchronizing information.

Claim 28

Dependent Claim 68 words

A method according to claim 16, wherein said navigation pack contains reproduction information describing addresses of 15 data units to be reproduced before and addresses of 15 data units to be reproduced after a data unit to which said navigation pack belongs, and also describing addresses of 20th, 60th, 120th, and 240th data units, said data unit to which said navigation pack belongs being a 0th data unit.

Claim 29

Dependent Claim 99 words

The method of claim 16, wherein: the navigation pack contains search information consecutively indicating the addresses of a specified number of data units to be searched for consecutively before and after the address of the navigation unit, and the data units are searched for with reference to the addresses, wherein the search information contains a flag indicating whether the data unit to be searched for contains video data, and a flag indicating whether there is video data in the data units between the address of the data unit to be searched for and the address of the navigation data.

Claim 30

Dependent Claim 53 words

A method according to claim 16, wherein said playback data contains a plurality of cell data items, where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item, a program being reproduced with reference to the cell data items.

Claim 31

Dependent Claim 30 words

A method according to claim 16, wherein said playback data contains a table in which a playback program is written to define a playback sequence of said cell data items.

Claim 32

Dependent Claim 48 words

A method according to claim 16, wherein said playback data contains a table in which a plurality of programs are written defining a playback sequence of said cell data items and program chain information indicating a relationship between the plurality of programs and performing playback in various modes.

Claim 33

Independent Claim 285 words

An apparatus for reproducing playback data containing navigation data, comprising: means for retrieving, from a recording medium, playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit comprising at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and means for converting the data unit into a playback signal with reference to the presentation control information and the data search information in the retrieved playback data and for reproducing the playback signal.

Claim 34

Independent Claim 285 words

An apparatus for reproducing playback data containing navigation data, comprising: means for retrieving, from a recording medium, playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit comprising at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and means for converting the data unit into a playback signal with reference to the presentation control information and the data search information in the retrieved playback data and for reproducing the playback signal.

Claim 35

Dependent Claim 17 words

An apparatus according to claim 31, wherein said navigation pack contains address information indicating its own address.

Claim 36

Dependent Claim 24 words

An apparatus according to claim 31, wherein said navigation pack contains end address for the data unit to which the navigation pack itself belongs.

Claim 37

Dependent Claim 53 words

An apparatus according to claim 31, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which a current angle of the scene to be reproduced is switched, wherein the angle is switched with reference to the address at the time of angle change.

Claim 38

Dependent Claim 28 words

An apparatus according to claim 34, wherein said angle information contains an item descripting no data unit related to an angle to which the current angle is switched.

Claim 39

Dependent Claim 52 words

An apparatus according to claim 34, wherein said angle information contains information on the addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs, where the data units are obtained with reference to the addresses so that the playback signal undergoes rewind playback.

Claim 40

Dependent Claim 50 words

An apparatus according to claim 34, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs, where the data units are obtained with reference to the addresses so that the playback signal undergoes fast-forward playback.

Claim 41

Dependent Claim 39 words

An apparatus according to claim 31, wherein said navigation pack contains end address information indicating an end address of the data unit containing the navigation pack, where a next data unit is acquired with reference to the end address.

Claim 42

Dependent Claim 47 words

An apparatus according to claim 31, wherein, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored.

Claim 43

Dependent Claim 72 words

An apparatus according to claim 31, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronizing information on at least one of the audio data and sub-picture data reproduced in synchronization with the video data, and at least either the audio data or the sub-picture data, together with the video data, is reproduced with reference to the synchronizing information.

Claim 44

Dependent Claim 50 words

An apparatus according to claim 31, wherein said navigation pack contains search information consecutively indicating the addresses of a specified number of data units to be searched for consecutively before and after the address of the navigation unit, and the data units are searched for with reference to the addresses.

Claim 45

Dependent Claim 41 words

An apparatus according to claim 41, wherein said search information contains a flag indicating whether there is video data in the data units between the address of the data unit to be searched for and the address of the navigation data.

Claim 46

Dependent Claim 53 words

An apparatus according to claim 31, wherein said playback data contains a plurality of cell data items, where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item, a program being reproduced with reference to the cell data items.

Claim 47

Dependent Claim 30 words

An apparatus according to claim 31, wherein said playback data contains a table in which a playback program is written to define a playback sequence of said cell data items.

Claim 48

Dependent Claim 49 words

An apparatus according to claim 44, wherein said playback data contains a table in which a plurality of programs are written defining a playback sequence of said cell data items and program chain information indicating a relationship between the plurality of programs and performing a playback in various modes.

Claim 49

Independent Claim 267 words

A method of recording playback data containing navigation data on a recording medium, comprising: preparing at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video audio or sub-picture data; preparing a plurality of data units, each of which is composed of a sequence of data packs that is to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, and a navigation pack provided at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and recording the data units time-sequentially on a recording medium so that the data units can be reproduced.

Claim 50

Independent Claim 267 words

A method of recording playback data containing navigation data on a recording medium, comprising: preparing at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video audio or sub-picture data; preparing a plurality of data units, each of which is composed of a sequence of data packs that is to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, and a navigation pack provided at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and recording the data units time-sequentially on a recording medium so that the data units can be reproduced.

Claim 51

Dependent Claim 17 words

A method according to claim 46, wherein said navigation pack contains address information indicating its own address.

Claim 52

Dependent Claim 25 words

A method according to claim 46, wherein said navigation pack contains an end address for the data unit to which the navigation pack itself belongs.

Claim 53

Dependent Claim 39 words

A method according to claim 46, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which a current angle of the scene to be reproduced is to be switched.

Claim 54

Dependent Claim 30 words

A method according to claim 49, wherein said angle information contains an item describing no data unit related to an angle to which the current angle is to be switched.

Claim 55

Dependent Claim 32 words

A method according to claim 49, wherein said angle information contains information indicating addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs.

Claim 56

Dependent Claim 31 words

A method according to claim 49, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs.

Claim 57

Dependent Claim 26 words

A method according to claim 46, wherein said navigation pack contains end address information indicating an end address of the data unit containing the navigation pack.

Claim 58

Dependent Claim 47 words

A method according to claim 46, wherein, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored.

Claim 59

Dependent Claim 48 words

A method according to claim 46, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronizing information on at least one of the audio data and sub-picture data reproduced in synchronization with the video data.

Claim 60

Dependent Claim 68 words

A method according to claim 46, wherein said navigation pack contains reproduction information describing addresses of 15 data units to be reproduced before and addresses of 15 data units to be reproduced after a data unit to which said navigation pack belongs, and also describing addresses of 20th, 60th, 120th, and 240th data units, said data unit to which said navigation pack belongs being a 0th data unit.

Claim 61

Dependent Claim 56 words

A method according to claim 46, wherein the step of recording data on said recording medium contains the step of recording data in units of a plurality of cell data items where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item.

Claim 62

Dependent Claim 42 words

A method according to claim 57, further including the step of creating a table in which a playback program is written defining a playback sequence of said cells, wherein the cell table is recorded on the recording medium in the recording step.

Claim 63

Dependent Claim 68 words

A method according to claim 57, further including the step of creating a table in which a plurality of programs are written defining a playback sequence of said cell data items, and the steps of creating program chain information indicating a relationship between the plurality of programs and performing playback in various modes, wherein the program chain information is recorded on the recording medium in the recording step.

Claim 64

Independent Claim 273 words

An apparatus for recording on a recording medium playback data containing navigation data, comprising: means for generating at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data; means for preparing a plurality of data units, each data unit being composed of a sequence of data packs that is to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, and a navigation pack provided at the head of the sequence, the navigation pack including a pack header a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and means for recording said data units time-sequentially on the recording medium so that said data units can be reproduced.

Claim 65

Independent Claim 273 words

An apparatus for recording on a recording medium playback data containing navigation data, comprising: means for generating at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data; means for preparing a plurality of data units, each data unit being composed of a sequence of data packs that is to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, and a navigation pack provided at the head of the sequence, the navigation pack including a pack header a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; and means for recording said data units time-sequentially on the recording medium so that said data units can be reproduced.

Claim 66

Dependent Claim 25 words

An apparatus according to claim 60, wherein said navigation pack contains an end address for the data unit to which the navigation pack itself belongs.

Claim 67

Dependent Claim 39 words

An apparatus according to claim 60, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which a current angle of the scene to be reproduced is to be switched.

Claim 68

Dependent Claim 30 words

An apparatus according to claim 62, wherein said angle information contains an item describing no data unit related to an angle to which the current angle is to be switched.

Claim 69

Dependent Claim 32 words

An apparatus according to claim 62, wherein said angle information contains information indicating addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs.

Claim 70

Dependent Claim 31 words

An apparatus according to claim 62, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs.

Claim 71

Dependent Claim 26 words

An apparatus according to claim 60, wherein said navigation pack contains end address information indicating an end address of the data unit containing the navigation pack.

Claim 72

Dependent Claim 47 words

An apparatus according to claim 60, wherein, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored.

Claim 73

Dependent Claim 48 words

An apparatus according to claim 60, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronizing information on at least one of the audio data and sub-picture data reproduced in synchronization with the video data.

Claim 74

Dependent Claim 68 words

An apparatus according to claim 60, wherein said navigation pack contains reproduction information describing addresses of 15 data units to be reproduced before and addresses of 15 data units to be reproduced after a data unit to which said navigation pack belongs, and also describing addresses of 20th, 60th, 120th, and 240th data units, said data unit to which said navigation pack belongs being a 0th data unit.

Claim 75

Dependent Claim 70 words

The apparatus of claim 60, wherein; the navigation pack contains search information consecutively indicating the addresses of a specified number of data units to be searched for consecutively before and after the address of the navigation unit, the search information containing a flag indicating whether there is video data in the data units between the address of the unit to be searched for and the address of the navigation data.

Claim 76

Dependent Claim 52 words

An apparatus according to claim 60, wherein said means for recording data on said recording medium records data in units of a plurality of cell data items, where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item.

Claim 77

Dependent Claim 41 words

An apparatus according to claim 71, further comprising means for creating a table in which a playback program is written defining the playback sequence of said cells, wherein the cell table is recorded by the recording means on the recording medium.

Claim 78

Dependent Claim 66 words

An apparatus according to claim 60, further comprising: means for creating a table in which a plurality of programs are written defining the playback sequence of said cells; and means for creating program chain information indicating the way of combining the plurality of playback programs and performing playback in various modes, wherein the program chain information is recorded by the recording means on the recording medium.

Claim 79

Dependent Claim 288 words

A communication system for transferring playback data containing navigation data, comprising: means for creating playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; means for transferring the data units; means for converting at least one of the data units into a playback signal with reference to the presentation control information and data search information; and means for reproducing the playback signal.

Claim 80

Dependent Claim 288 words

A communication system for transferring playback data containing navigation data, comprising: means for creating playback data comprising a plurality of data units to be played back time-sequentially and each to be reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit being composed of at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; means for transferring the data units; means for converting at least one of the data units into a playback signal with reference to the presentation control information and data search information; and means for reproducing the playback signal.

Claim 81

Dependent Claim 18 words

A communication system according to claim 74, wherein said navigation pack contains address information indicating its own address.

Claim 82

Dependent Claim 26 words

A communication system according to claim 74, wherein said navigation pack contains an end address for the data unit to which the navigation pack itself belongs.

Claim 83

Dependent Claim 54 words

A communication system according to claim 74, wherein said navigation pack contains angle information indicating an address of the data unit related to an angle to which the current angle of the scene to be reproduced is switched, where the angle is switched with reference to the address at the time of angle change.

Claim 84

Dependent Claim 33 words

A communication system according to claim 77, wherein said angle information contains a specific description indicating the existence of no data unit related to an angle to which the current angle is switched.

Claim 85

Dependent Claim 52 words

A communication system according to claim 77, wherein said angle information contains information indicating addresses of the data units to be reproduced later than the data unit to which the navigation pack belongs, so that the data units are obtained with reference to the addresses and the playback signal undergoes rewind playback.

Claim 86

Dependent Claim 54 words

A communication system according to claim 77, wherein said angle information contains the addresses of the data units to be reproduced earlier than the data unit to which the navigation pack belongs, where the data units are obtained with reference to the addresses and the playback signal undergoes fast-forward playback at the playback means.

Claim 87

Dependent Claim 39 words

A communication system according to claim 74, wherein said navigation pack contains end address information indicating end address of the data unit containing the navigation pack, where the next data unit is acquired with reference to the end address.

Claim 88

Dependent Claim 67 words

A communication system according to claim 74, wherein said navigation pack, when said data unit contains the video data determined in MPEG, said navigation pack contains end address information indicating the address in the data unit in which the minimum data capable of forming an image of I picture is stored, and the minimum data to reproduce the I picture is acquired with reference to the address.

Claim 89

Dependent Claim 73 words

A communication system according to claim 74, wherein, when said data unit contains video data and at least one of audio data and sub-picture data, said navigation pack contains synchronization information on the at least one audio data and sub-picture data to be reproduced in synchronization with the video data, where the at least one audio data and sub-picture data is reproduced, together with the video data, with reference to the synchronizing information.

Claim 90

Dependent Claim 69 words

A communication system according to claim 74, wherein said navigation pack contains reproduction information describing addresses of 15 data units to be reproduced before and addresses of 15 data units to be reproduced after a data unit to which said navigation pack belongs, and also describing addresses of 20th, 60th, 120th, and 240th data units, said data unit to which said navigation pack belongs being a 0th data unit.

Claim 91

Dependent Claim 84 words

the communication system of claim 74, wherein: the navigation pack contains search information consecutively indicating the addresses of a specified number of data units to be searched for consecutively before and after the address of the navigation unit, and the data units are searched for with reference to the addresses, the search information containing a flag indicating whether there is video data in the data units between the address of the data unit to be searched for and the address of the navigation data.

Claim 92

Dependent Claim 65 words

A communication system according to claim 74, wherein said playback data contains a plurality of cell data items, where the data units to be time-sequentially made playback objects are stored in each cell data item, one data unit for one cell data item, where the transferring means transfers the cell data items, and where the reproducing means reproduces a program from the cell data items.

Claim 93

Dependent Claim 30 words

A communication system according to claim 74, wherein said playback data contains a table in which a playback program is written defining a playback sequence of said cell data items.

Claim 94

Dependent Claim 48 words

A communication system according to claim 74, wherein said playback data contains a table in which a plurality of programs are written defining a playback sequence of cell data items and program chain information indicating a relationship between the plurality of programs and performing playback in various modes.

Claim 95

Dependent Claim 274 words

A recording medium with navigation data comprising: a plurality of data cells whose playback sequence can be specified and which are to be played back consecutively and time-sequentially, each data cell being composed of a plurality of data units, each data unit being reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the sane pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address Contains video data; and a table second playback information is written concerning playback of each data cell.

Claim 96

Dependent Claim 274 words

A recording medium with navigation data comprising: a plurality of data cells whose playback sequence can be specified and which are to be played back consecutively and time-sequentially, each data cell being composed of a plurality of data units, each data unit being reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the sane pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address Contains video data; and a table second playback information is written concerning playback of each data cell.

Claim 97

Dependent Claim 24 words

A recording medium according to claim 89, wherein said second playback information contains an address of the first data unit in each data cell.

Claim 98

Dependent Claim 23 words

A recording medium according to claim 89, wherein second playback information contains an address of the end data unit in each data cell.

Claim 99

Dependent Claim 20 words

A recording medium according to claim 89, wherein said second playback information contains the playback time of the data cell.

Claim 100

Dependent Claim 31 words

. A recording medium according to claim 89, wherein said second playback information is written on said table according the an order in which the data cells are to be reproduced.

Claim 101

Dependent Claim 15 words

A recording medium according to claim 89, wherein said data cells are assigned identification numbers.

Claim 102

Dependent Claim 28 words

A recording medium according to claim 89, wherein said navigation pack contains information on the time when the data unit containing the navigation pack is to be reproduced.

Claim 103

Independent Claim 286 words

A method of reproducing playback data containing navigation data, comprising: acquiring contents of a table that includes first playback information indicating playback information for data cells; and playing back the data cells based on contents of the table and converting information from the data cells into playback signals, the data cells being played back consecutively and time-sequentially, each data cell being composed of a plurality of data units to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data.

Claim 104

Independent Claim 286 words

A method of reproducing playback data containing navigation data, comprising: acquiring contents of a table that includes first playback information indicating playback information for data cells; and playing back the data cells based on contents of the table and converting information from the data cells into playback signals, the data cells being played back consecutively and time-sequentially, each data cell being composed of a plurality of data units to be reproduced within a specified period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data.

Claim 105

Dependent Claim 23 words

A method according to claim 96, wherein said first playback information contains an address of a first data unit in each data cell.

Claim 106

Dependent Claim 23 words

A method according to claim 96, wherein said first playback information contains the address of a last data unit in each data cell.

Claim 107

Dependent Claim 18 words

A method according to claim 96, wherein said playback information contains the playback time of the data cell.

Claim 108

Dependent Claim 33 words

A method according to claim 96, wherein said acquiring step contains the step of transferring the data cell to be reproduced after a certain time has elapsed with reference to said playback time.

Claim 109

Dependent Claim 29 words

A method according to claim 96, wherein said first playback information is written on said table according to an order in which the data cells are to be reproduced.

Claim 110

Dependent Claim 14 words

A method according to claim 96, wherein said data cells are assigned identification numbers.

Claim 111

Dependent Claim 66 words

A method according to claim 96, wherein said navigation pack contains information indicating a time when the data unit containing the navigation pack is to be reproduced, and said acquiring step contains the step of transferring the data cell to be reproduced after a certain time has elapsed with reference to the playback time of said data cell and the time information on the data unit.

Claim 112

Dependent Claim 35 words

A method according to claim 103, wherein said acquiring step includes a step of indicating a playback time and determining an address of a data unit which is to be reproduced at the indicated time.

Claim 113

Independent Claim 338 words

An apparatus for reproducing data from a recording medium with navigation data, comprising: means for receiving playback information from said recording medium and for storing second playback information, where the recording medium contains: a plurality of data cells whose playback sequence can be specified and which are to be played back consecutively and time-sequentially, each data cell being composed of a plurality of data units, each data unit being reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data, and a table in which the second playback information is written concerning playback of each data cell; means for converting the playback information from the data cell into playback signals; and means for transferring the playback information from the data cells to the converting means with reference to the stored playback information.

Claim 114

Independent Claim 338 words

An apparatus for reproducing data from a recording medium with navigation data, comprising: means for receiving playback information from said recording medium and for storing second playback information, where the recording medium contains: a plurality of data cells whose playback sequence can be specified and which are to be played back consecutively and time-sequentially, each data cell being composed of a plurality of data units, each data unit being reproduced within a specific period of time, the specific time period for each data unit being substantially equal, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data, and a table in which the second playback information is written concerning playback of each data cell; means for converting the playback information from the data cell into playback signals; and means for transferring the playback information from the data cells to the converting means with reference to the stored playback information.

Claim 115

Dependent Claim 22 words

An apparatus according to claim 105, wherein said playback information contains an address of a first data unit in each data cell.

Claim 116

Dependent Claim 23 words

An apparatus according to claim 105, wherein said second playback information contains an address of a last data unit in each data cell.

Claim 117

Dependent Claim 19 words

An apparatus according to claim 105, wherein said second playback information contains a playback time of the data cell.

Claim 118

Dependent Claim 33 words

An apparatus according to claim 105, wherein said transferring means transfers the data cell to be reproduced to the converting means after a certain time has elapsed with reference to said playback time.

Claim 119

Dependent Claim 29 words

An apparatus according to claim 105, wherein said second playback information is written on said table according to an order in which the data cells are to be reproduced.

Claim 120

Dependent Claim 14 words

An apparatus according to claim 105, wherein said data cells are assigned identification numbers.

Claim 121

Dependent Claim 76 words

An apparatus according to claim 105, wherein said playback information contains the playback time of the data cell, said navigation pack contains information indicating a time when the data unit containing the navigation pack is to be reproduced, and said transferring means transfers the data cell to be reproduced to the converting means after a specific time has elapsed with reference to the playback time of said cell and the time information on the data unit.

Claim 122

Dependent Claim 33 words

A method according to claim 105, wherein said acquiring step includes a step of indicating a playback time and determining an address of a data unite which is playbacks at the indicated time.

Claim 123

Independent Claim 303 words

A method of recording playback data containing navigation data on a recording medium, comprising: preparing at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, a navigation pack being placed at the head of each predetermined sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; preparing a plurality of data units, each of which is composed of at least one data pack train, each data unit to be reproduced within a certain period of time; collecting the plurality of data units to be reproduced time-sequentially and creating a plurality of data cells whose playback sequence can be specified; creating a table in which second playback information is written concerning playback of each data cell; and recording on the recording medium the plurality of data cells and the table, the data cells being recorded immediately after the table.

Claim 124

Independent Claim 303 words

A method of recording playback data containing navigation data on a recording medium, comprising: preparing at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video, audio or sub-picture data, a navigation pack being placed at the head of each predetermined sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; preparing a plurality of data units, each of which is composed of at least one data pack train, each data unit to be reproduced within a certain period of time; collecting the plurality of data units to be reproduced time-sequentially and creating a plurality of data cells whose playback sequence can be specified; creating a table in which second playback information is written concerning playback of each data cell; and recording on the recording medium the plurality of data cells and the table, the data cells being recorded immediately after the table.

Claim 125

Dependent Claim 23 words

A method according to claim 114, wherein said second playback information contains an address of a first data unit in each data cell.

Claim 126

Dependent Claim 23 words

A method according to claim 114, wherein said second playback information contains an address of a last data unit in each data cell.

Claim 127

Dependent Claim 19 words

A method according to claim 114, wherein said second playback information contains a playback time of the data cell.

Claim 128

Dependent Claim 29 words

A method according to claim 114, wherein said second playback information is written on said table according to an order in which the data cells are to be reproduced.

Claim 129

Dependent Claim 14 words

A method according to claim 114, wherein said data cells are assigned identification numbers.

Claim 130

Dependent Claim 52 words

A method according to claim 114, wherein said navigation pack contains information on a time when the data unit containing the navigation pack is reproduced, and said transferring means transfers the data cell to be reproduced to the converting means after a specific time has elapsed with reference to the playback time.

Claim 131

Independent Claim 314 words

An apparatus for recording playback data containing navigation data on a recording medium, comprising: means for creating at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video audio or sub-picture data; means for preparing a plurality of data units, each data unit being composed of a sequence of data packs and a navigation pack, each data unit to be reproduced within a certain period of time, the navigation pack located at a head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; means for collecting the plurality of data units so that they may be reproduced time-sequentially and for creating a plurality of data cells whose playback sequence can be specified; means for creating a table in which second playback information is written concerning playback of each data cell; and means for recording the plurality of data cells and the table, the data cells being recorded immediately after the table.

Claim 132

Independent Claim 314 words

An apparatus for recording playback data containing navigation data on a recording medium, comprising: means for creating at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes a header and a packet of encoded video audio or sub-picture data; means for preparing a plurality of data units, each data unit being composed of a sequence of data packs and a navigation pack, each data unit to be reproduced within a certain period of time, the navigation pack located at a head of the sequence, the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in a playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flag indicating whether or not the data unit designated by each start address contains video data; means for collecting the plurality of data units so that they may be reproduced time-sequentially and for creating a plurality of data cells whose playback sequence can be specified; means for creating a table in which second playback information is written concerning playback of each data cell; and means for recording the plurality of data cells and the table, the data cells being recorded immediately after the table.

Claim 133

Dependent Claim 22 words

An apparatus according to claim 89, wherein said playback information contains an address of a first data unit in each data cell.

Claim 134

Dependent Claim 22 words

An apparatus according to claim 89, wherein said playback information contains an address of a lost data unit in each data cell.

Claim 135

Dependent Claim 18 words

An apparatus according to claim 89, wherein said playback information contains a playback time for the data cell.

Claim 136

Dependent Claim 28 words

An apparatus according to claim 121, wherein said second playback information is written on said table based on an order in which the cells are to be reproduced.

Claim 137

Dependent Claim 15 words

An apparatus according to claim 89, wherein said data cells are assigned identification numbers .

Claim 138

Dependent Claim 27 words

An apparatus according to claim 89, wherein the navigation pack stores playback information on the data pack and navigation information indicating the relationship with other data units.

Claim 139

Dependent Claim 27 words

An apparatus according to claim 89, wherein said navigation pack contains information on a time when the data unit containing the navigation pack is to be reproduced.

Claim 140

Dependent Claim 287 words

A communication system for transferring playback data containing navigation data, comprising: means for creating a plurality of data cells whose playback sequence can be specified and which are played back consecutively and time-sequentially, each data cell being composed of a plurality of data units to be reproduced within a specific period of time, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes, a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flat indicating whether or not the data unit designated by each start address contains video data; a table in which second playback information is written concerning the playback of each data cell; and means for transferring the table with reference to the table after transferring the data units including the navigation pack.

Claim 141

Dependent Claim 287 words

A communication system for transferring playback data containing navigation data, comprising: means for creating a plurality of data cells whose playback sequence can be specified and which are played back consecutively and time-sequentially, each data cell being composed of a plurality of data units to be reproduced within a specific period of time, each data unit including at least one predetermined sequence of data packs, each data pack having the same pack length, the sequence of data packs including at least one of video packs, audio packs and sub-picture packs, wherein each data pack includes, a header and a packet of encoded video, audio or sub-picture data, and a navigation pack placed at the head of the sequence the navigation pack including a pack header, a first packet and a second packet, the first packet being composed of a packet header and first control information for storing presentation control information, which includes a start time and an end time of the presentation of the data unit, and the second packet being composed of a packet header and second control information for storing data search information, which includes a list of start addresses of a number of data units forward and backward in playback order of the sequence, each listed start address expressed as a start address relative from the start address of the respective data unit to which the navigation data pack belongs, and a flat indicating whether or not the data unit designated by each start address contains video data; a table in which second playback information is written concerning the playback of each data cell; and means for transferring the table with reference to the table after transferring the data units including the navigation pack.

Claim 142

Dependent Claim 23 words

A communication system according to claim 129, wherein said playback information contains an address of a first data unit in each data cell.

Claim 143

Dependent Claim 22 words

A communication system according to claim 129, wherein said playback information contains an address for date data unit in each data cell.

Claim 144

Dependent Claim 18 words

A communication system according to claim 129, wherein said playback information contains the playback time of the cell.

Claim 145

Dependent Claim 34 words

A communication system according to claim 129, wherein said acquiring step contains the step of transferring the data cell to be reproduced with reference to said playback time after a certain time has elapsed.

Claim 146

Dependent Claim 30 words

A communication system according to claim 129, wherein said second playback information is written on said table according to an order in which the data cells are to be reproduced.

Claim 147

Dependent Claim 15 words

A communication system according to claim 129, wherein said data cells are assigned identification numbers.

Claim 148

Dependent Claim 28 words

A communication system according to claim 129, wherein said navigation pack contains information on the time when the data unit containing the navigation pack is to be reproduced.

Claim 149

Dependent Claim 35 words

A communication system according to claim 129, further comprising, converting at least one of means for converting the data units into a playback signal with reference to the navigation information in the transferred playback data.

Claim 150

Dependent Claim 21 words

A communication system according to claim 137, wherein said converting means receives the data cells with reference to said navigation pack.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-02-08	2002-08-10	2003-02-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-02-08	2006-08-10	2007-02-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-02-08	2010-08-10	2011-02-09	$7700.00	Window Closed / Lapsed

Recording medium on which a data containing navigation data is recorded, a method and apparatus for reproducing a data according to navigation data, a method and apparatus for recording a data containing navigation data on a recording

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