Picture signal coding method, decoding method and picture signal recording medium

Claim 2

A picture signal recording method according to claim 1, wherein the predetermined picture unit is a GOP.

Claim 3

A picture signal recording method according to claim 1, wherein the coded picture signals for high speed reproduction are intracoded pictures.

Claim 4

A picture signal recording method according to claim 1, wherein the coded picture signals for high speed reproduction are intr-coded pictures and at least one predictive-coded picture.

Claim 5

A picture signal recording method according to claim 1, wherein the recording signal is allocated so that the coded picture signals for high speed reproduction may be positioned at the top of a sector of the recording medium.

Claim 6

A picture signal recording method according to claim 5, wherein a subcode corresponding to each sector is added to the recording signal and includes an identification signal which indicates whether or not the sector includes the coded picture signals for high speed reproduction.

Claim 7

A picture signal recording method, comprising the steps of: coding an input picture signal to produce a coded picture signal; dividing the coded picture signal into coded picture signals for high speed reproduction and the other coded picture signals; successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal; and recording the recording signal onto a recording medium.

Claim 8

A picture signal recording method according to claim 7, wherein the recording signal is allocated for each fixed amount of codes to a sector of the recording medium, and a subcode corresponding to each sector is added to the recording signal and includes an identification signal which indicates whether or not the sector includes the coded picture signals for high speed reproduction and a pointer signal indicative of a top address of the coded picture signals for high speed reproduction in the sector.

Claim 9

A picture signal recording method according to claim 8, wherein the subcode further includes a signal indicative of an amount of data of the coded picture signals for high speed reproduction.

Claim 10

A picture signal recording method according to claim 8, wherein the subcode further includes a signal indicative of a position of another sector in which next coded picture signals for high speed reproduction are included.

Claim 11

A picture signal recording method according to claim 7, wherein TOC data are added to the recording signal and include a signal indicative of a position of a sector which includes the coded picture signals for high speed reproduction.

Claim 12

A picture signal recording method, comprising the steps of: coding an input picture signal to produce a coded picture signal; dividing the coded picture signal based on one picture into coded picture signals of a high priority degree and coded picture signals of a low priority degree; producing a recording signal of such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are not present in one packet; and recording the recording signal onto a recording medium.

Claim 13

A picture signal recording method according to claim 12, wherein a position at which the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are separated from each other is determined in units of a slice.

Claim 14

A picture signal recording method according to claim 12, wherein a block end code is added to the last end of the coded picture signals of a high priority degree.

Claim 15

A picture signal recording method according to claim 12, wherein an identification signal for identification between the coded picture signals of a high priority degree and the coded picture signals of a low priority degree is provided in a header of the packet.

Claim 16

A picture signal recording method according to claim 12, wherein the recording signal is distributed for each fixed amount of codes to a sector of the recording medium, and a subcode corresponding to the sector is added to the recording signal and includes a signal indicative of an address of another sector in which next coded picture signals of a high priority degree are included.

Claim 17

A picture signal recording method according to claim 12, wherein the recording signal is distributed for each fixed amount of codes to a sector of the recording medium, and TOC data are added to the recording signal and include a signal indicative of a position of a sector in which the coded picture signals of a high priority degree are included.

Claim 18

A picture signal recording method according to claim 12, wherein the recording signal is arranged so that the coded picture signals of a high priority in the predetermined picture unit may be positioned at the top of the predetermined picture unit.

Claim 19

A picture signal recording method according to claim 18, wherein the predetermined picture unit is a GOP.

Claim 20

A picture signal recording method according to claim 18, wherein the recording signal is applied to the sector so that the coded picture signals of a high priority degree may be positioned at the top of the sector of the recording medium.

Claim 21

A picture signal recording method according to claim 18, wherein the predetermined picture unit is a frame.

Claim 22

A picture signal recording method according to claim 12, wherein the coded picture signals of a high priority degree are data of an intra-macro block of each frame.

Claim 23

A picture signal recording method according to claim 12, wherein the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are once stored temporarily into storage means which is divided into two regions for individually storing the coded picture signals of a high priority degree and the coded picture signals of a low priority degree and then the coded picture signals of a high priority degree are read out first and thereafter the coded picture signals of a low priority degree are read out and transmitted, and reading and writing of the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from and into said storage means is controlled individually with write pointers and read pointers for them.

Claim 24

A picture signal reproduction method, comprising the steps of: reproducing, from a recording medium on which a coded picture signal is recorded such that coded picture signals for high speed reproduction in a predetermined picture unit and the other coded picture signals are disposed so that the coded picture signals for high speed reproduction are positioned at the top of the predetermined picture unit, the coded picture signal; separating the coded picture signal into the coded picture signals for high speed reproduction and the other coded picture signals; re-arranging the coded picture signals for high speed reproduction and the other coded picture signals thus separated in a predetermined order to produce a re-arranged signal; and decoding the re-arranged signal to produce a decoded picture for ordinary reproduction.

Claim 25

A picture signal reproduction method according to calim 24, wherein the separation is performed based on an identification signal provided in a subcode for identification between the coded picture signals for high speed reproduction and the other coded picture signals.

Claim 26

A picture signal reproduction method, comprising the steps of: reproducing, from a recording medium on which a coded picture signal is recorded such that coded picture signals for high speed reproduction and the other coded picture signals are disposed so that the coded picture signals for high speed reproduction in a predetermined picture unit are positioned at the top of the predetermined picture unit, only the coded picture signals for high speed reproduction; and decoding only the coded picture signals for high speed reproduction thus reproduced to produce a decoded picture for high speed reproduction.

Claim 27

A picture signal reproduction method according to claim 26, wherein the coded picture signal is allocated to each sector so that the top of the predetermined picture unit coincides with the top of the sector of the recording medium, and only those sectors in which the coded picture signals for high speed reproduction are included are reproduced.

Claim 28

A picture signal reproduction method, comprising the steps of: reproducing, from a recording medium on which a coded picture signal is recorded such that coded picture signals for high speed reproduction and the other coded picture signals are successively arranged at a predetermined ratio and the coded picture signal is allocated for each predetermined amount of codes to each sector, a sector to which the coded picture signals for high speed reproduction are allocated; separating, in response to a signal representative of a top address of the coded picture signals for high speed reproduction in a subcode of the sector, the coded picture signals for high speed reproduction and the other coded picture signals thus reproduced from the sector from each other; and decoding the thus separated coded picture signals for high speed reproduction to produce a decoded picture for high speed reproduction.

Claim 29

A picture signal reproduction method according to claim 28, wherein the coded picture signals for high speed reproduction are separated in response to a signal indicative of an amount of data of the coded picture signals for high speed reproduction in the subcode.

Claim 30

A picture signal reproduction method according to claim 28, wherein next coded picture signals for high speed reproduction are reproduced in response to a signal indicative of a position of the next coded picture signals for high speed reproduction in the subcode.

Claim 31

A picture signal reproduction method according to claim 28, wherein TOC data indicative of an address of a sector in which the coded picture signals for high speed reproduction are recorded are reproduced, and a sector to which the coded picture signals for high speed reproduction are allocated is reproduced in response to the TOC data thus reproduced.

Claim 32

A picture signal reproduction method, comprising the steps of: reproducing, from a recording medium on which coded picture signals of a high priority degree and coded picture signals of a low priority degree, into which a coded picture signal based on one picture is divided, are recorded in such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signal; separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet for identification between the coded picture signals of a high priority degree and the coded picture signals of a low priority degree; and decoding only the coded picture signals of a high priority degree upon high speed reproduction.

Claim 33

A picture signal reproduction method according to claim 32, wherein the coded picture signal is reproduced in response to a signal indicative of an address of a sector including the coded picture signals of a high priority degree in a subcode.

Claim 34

A picture signal reproduction method according to claim 32, wherein the coded picture signal is reproduced in response to a signal indicative of an address of a sector including the coded picture signals of a high priority degree in a TOC.

Claim 35

A picture signal reproduction method, comprising the steps of: reproducing, from a recording medium on which coded picture signals of a high priority degree and coded picture signals of a low priority degree, into which a coded picture signal based on one picture is divided, are recorded in such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signal; separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet for identification between the coded picture signals of a high priority degree and the coded picture signals of a low priority degree; combining the coded picture signals of a high priority degree and the coded picture signals of a low priority degree in response to a link signal provided in the header of the packet to produce a combination signal; and decoding the combination signal to produce a decoded picture signal for ordinary reproduction.

Claim 36

A picture signal reproduction method according to claim 35, wherein the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are once stored temporarily into storage means which is divided into two regions for individually storing the coded picture signals of a high priority degree and the coded picture signals of a low priority degree and then the coded picture signals of a high priority degree are read out first and thereafter the coded picture signals of a low priority degree are read out and transmitted, and reading and writing of the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from and into said storage means is controlled individually with write pointers and read pointers for them.

Claim 37

A picture signal reproduction method according to claim 35, wherein an error of the coded picture signals of a low priority degree is detected, and only the coded picture signals of a high priority degree are decoded as the coded picture signal for ordinary reproduction until after the error is recovered.

Claim 38

A picture signal recording apparatus, comprising: coding means (1) for coding an input picture signal to produce a coded picture signal; division means (2) for dividing the coded picture signal into coded picture signals for high speed reproduction and the other coded picture signals; multiplexing means (6) for arranging the coded picture signals for high speed reproduction and the other coded picture signals so that the coded picture signals for high speed reproduction in a predetermined picture unit may be positioned at the top of the predetermined picture unit to produce a recording signal; and recording means (10) for recording the recording signal onto a recording medium.

Claim 39

A picture signal recording apparatus, comprising: coding means (1) for coding an input picture signal to produce a coded picture signal; division means (2) for dividing the coded picture signal into coded picture signals for high speed reproduction and the other coded picture signals; multiplexing means (6) for successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal; and recording means (10) for recording the recording signal onto a recording medium.

Claim 40

A picture signal recording apparatus, comprising the steps of: coding means (1) for coding an input picture signal to produce a coded picture signal; division means (2) for dividing the coded picture signal based on one picture into coded picture signals of a high priority degree and coded picture signals of a low priority degree; multiplexing means (6) for producing a recording signal of such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree are not present in one packet; and recording means (10) for recording the recording signal onto a recording medium.

Claim 41

A picture signal reproduction apparatus, comprising: reproduction means (41) for reproducing, from a recording medium (10) on which a coded picture signal is recorded such that coded picture signals for high speed reproduction in a predetermined picture unit and the other coded picture signals are disposed so that the coded picture signals for high speed reproduction are positioned at the top of the predetermined picture unit, the coded picture signal; separation means (44) for separating the coded picture signal into the coded picture signals for high speed reproduction and the other coded picture signals; means (49) for re-arranging the coded picture signals for high speed reproduction and the other coded picture signals thus separated in a predetermined order to produce a re-arranged signal; and decoding means (49) for decoding the re-arranged signal to produce a decoded picture for ordinary reproduction.

Claim 42

A picture signal reproduction apparatus, comprising: reproduction means (41) for reproducing, from a recording medium (10) on which a coded picture signal is recorded such that coded picture signals for high speed reproduction and the other coded picture signals are disposed so that the coded picture signals for high speed reproduction in a predetermined picture unit are positioned at the top of the predetermined picture unit, only the coded picture signals for high speed reproduction; and decoding means (49) for decoding only the coded picture signals for high speed reproduction thus reproduced to produce a decoded picture for high speed reproduction.

Claim 43

A picture signal reproduction apparatus, comprising: reproduction means (41) for reproducing, from a recording medium (10) on which a coded picture signal is recorded such that coded picture signals for high speed reproduction and the other coded picture signals are successively arranged at a predetermined ratio and the coded picture signal is allocated for each predetermined amount of codes to each sector, a sector to which the coded picture signals for high speed reproduction are allocated; separation means (44) for separating, in response to a signal representative of a top address of the coded picture signals for high speed reproduction in a subcode of the sector, the coded picture signals for high speed reproduction and the other coded picture signals thus reproduced from the sector from each other; and decoding means (49) for decoding the thus separated coded picture signals for high speed reproduction to produce a decoded picture for high speed reproduction.

Claim 44

A picture signal reproduction apparatus, comprising: reproduction means (41) for reproducing, from a recording medium (10) on which coded picture signals of a high priority degree and coded picture signals of a low priority degree, into which a coded picture signal based on one picture is divided, are recorded in such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signal; separation means (44) for separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet for identification between the coded picture signals of a high priority degree and the coded picture signals of a low priority degree; and decoding means (49) for decoding only the coded picture signals of a high priority degree upon high speed reproduction.

Claim 45

A picture signal reproduction apparatus, comprising: reproduction means (41) for reproducing, from a recording medium (10) on which coded picture signals of a high priority degree and coded picture signals of a low priority degree, into which a coded picture signal based on one picture is divided, are recorded in such a packet construction that the coded picture signals of a high priority degree and the coded picture signals of a low priority degree do not exist in a same packet, the coded picture signal; separation means (44) for separating the coded picture signals of a high priority degree and the coded picture signals of a low priority degree from each other in response to an identification signal provided in a header of the packet for identification between the coded picture signals of a high priority degree and the coded picture signals of a low priority degree; means (123) for combining the coded picture signals of a high priority degree and the coded picture signals of a low priority degree in response to a link signal provided in the header of the packet to produce a combination signal; and decoding means (49) for decoding the combination signal to produce a decoded picture signal for ordinary reproduction.

Claim 46

A picture signal recording medium, formed by the steps of: coding an input picture signal to produce a coded picture signal; dividing the coded picture signal into coded picture signals for high speed reproduction and the other coded picture signals; arranging the coded picture signals for high speed reproduction and the other coded picture signals so that the coded picture signals for high speed reproduction in a predetermined picture unit may be positioned at the top of the predetermined picture unit to produce a recording signal; and recording the recording signal onto the recording medium.

Claim 47

A picture signal recording medium, formed by the steps of: coding an input picture signal to produce a coded picture signal; dividing the coded picture signal into coded picture signals for high speed reproduction and the other coded picture signals; successively arranging the coded picture signals for high speed reproduction and the other coded picture signals at a predetermined ratio to produce a recording signal; and recording the recording signal onto a recording medium.

Claim 48

A picture signal recording medium, formed by the steps of: coding an input picture signal to produce a coded picture signal; dividing the coded picture signal based on one picture into coded picture signals of a high priority degree and coded picture signals of a low priority degree; producing a recording signal of such a packet construction that the coded picture signals for high speed reproduction and the other coded picture signals are not present in one packet; and recording the recording signal onto a recording medium.