Apparatus for separately recording input coded video signal and important data generated therefrom

Claim 2

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting the input coded video signal as is as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium.

Claim 3

The video signal recording apparatus as claimed in claim 1, wherein said important data generating means includes selecting means for selecting from the input coded video signal a predetermined coded video signal containing intra-picture coded data, said predetermined coded video signal being outputted as said important data.

Claim 4

The video signal recording apparatus as claimed in claim 2, wherein said selecting means selects as the predetermined coded video signal a predetermined picture which contains intra-picture coded data.

Claim 5

The video signal recording apparatus as claimed in claim 3, wherein said selecting means selects as the predetermined coded video signal a predetermined picture which is entirely intra-picture coded.

Claim 6

The video signal recording apparatus as claimed in claim 1, wherein said important data generating means generates the important data from at least a part of an entirely intra-picture coded picture contained in the input coded video signal.

Claim 7

The video signal recording apparatus as claimed in claim 1, wherein said important data generating means generates the important data from a low frequency component coded data of an entirely intra-picture coded picture contained in the input coded video signal.

Claim 8

The video signal recording apparatus as claimed in claim 1, wherein said important data generating means generates the important data from intra-picture coded data forming a central area of a predetermined picture contained in the input coded video signal.

Claim 9

The video signal recording apparatus as claimed in claim 1, wherein said important data generating means includes calculating means for calculating a range of a recording area where said important data can be recorded in the recording medium, and determines an amount of said important data based on the thus calculated range.

Claim 10

The video signal recording apparatus as claimed in claim 1, wherein said recording means records said important data repeatedly at least two times on the recording medium.

Claim 11

The video signal recording apparatus as claimed in claim 1, wherein said recording medium is a recording tape, and wherein said recording means records said important data in areas on said recording tape which are reproducible in a high speed reproducing mode.

Claim 12

The video signal recording apparatus as claimed in claim 1, wherein said recording medium is a recording tape, and wherein said recording means records said important data in a predetermined fixed area on each of recording tracks of said recording tape.

Claim 13

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; memory means for temporarily storing coded data of a picture commanded through a memory renewal decision means and for outputting the stored coded data as said important data; counting means for counting a number of the coded data outputted from said memory means after renewal of a content of said memory means; and said memory renewal decision means for outputting a command to said memory means so as to store coded data of the predetermined picture when said intra/inter-picture decision means judges that the predetermined picture is entirely intra-picture coded and a counted value obtained by said counting means exceeds a predetermined value.

Claim 14

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; memory means for temporarily storing coded data of a picture commanded through a memory renewal decision means and for outputting the stored coded data as said important data; counting means for counting a number of the coded data outputted from said memory means after renewal of a content of said memory means; and said memory renewal decision means for outputting a command to said memory means so as to store coded data of the predetermined picture when said intra/inter-picture decision means judges that the predetermined picture is entirely intra-picture coded and a counted value obtained by said counting means exceeds a predetermined value.

Claim 15

The video signal recording apparatus as claimed in claim 12, wherein said predetermined value is larger than a total data amount of coded data for a picture which is stored in said memory means.

Claim 16

The video signal recording apparatus as claimed in claim 12, wherein a period of outputting said command by said memory renewal decision means is an integer multiple of a period of occurrence of entirely intra-picture coded pictures in the input coded video signal.

Claim 17

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from such a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; first memory means for temporarily storing coded data of the predetermined picture which is judged by said intra-inter-picture decision means as being entirely intra-picture coded; second memory means for storing coded data for a picture which is stored or being stored on a nearest time in said first memory means when a command is outputted from a memory renewal decision means and for outputting the coded data stored therein as said important data; counting means for counting a number of the coded data outputted from said second memory means after renewal of a content of said second memory means; and said memory renewal decision means for outputting a command so as to transmit a content of said first memory means to said second memory means when a count value of said counting means exceeds a predetermined value.

Claim 18

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from such a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; first memory means for temporarily storing coded data of the predetermined picture which is judged by said intra-inter-picture decision means as being entirely intra-picture coded; second memory means for storing coded data for a picture which is stored or being stored on a nearest time in said first memory means when a command is outputted from a memory renewal decision means and for outputting the coded data stored therein as said important data; counting means for counting a number of the coded data outputted from said second memory means after renewal of a content of said second memory means; and said memory renewal decision means for outputting a command so as to transmit a content of said first memory means to said second memory means when a count value of said counting means exceeds a predetermined value.

Claim 19

The video signal recording apparatus as claimed in claim 15, wherein said predetermined value is larger than a total data amount of coded data for one picture which is stored in said first memory.

Claim 20

The video signal recording apparatus as claimed in claim 15, wherein a period of outputting said command by said memory renewal decision means is an integer multiple of a period of occurrence of entirely intra-picture coded pictures in the input coded video signal.

Claim 21

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; first and second memory means arranged in parallel, each of said first and second memory means being operable in an operating mode which is one of a storing mode for temporarily storing coded data of the predetermined picture which is judged by said intra/inter-picture decision means as being entirely intra-picture coded and an outputting mode for outputting coded data stored therein as said important data, said first and second memory means operating in such a manner that one of said first and second memory means operates in the storing mode and the other operates in the outputting mode; counting means for counting a number of the coded data outputted from one of said first and second memory means after renewal of a content of said one of said first and second memory means; and memory renewal decision means for outputting a command so as to change the operating mode of each of said first and second memory means from one of the storing mode and the outputting mode to the other when a count value of said counting means exceeds a predetermined value.

Claim 22

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: intra/inter-picture decision means for judging whether a predetermined picture contained in the input coded video signal is entirely intra-picture coded; first and second memory means arranged in parallel, each of said first and second memory means being operable in an operating mode which is one of a storing mode for temporarily storing coded data of the predetermined picture which is judged by said intra/inter-picture decision means as being entirely intra-picture coded and an outputting mode for outputting coded data stored therein as said important data, said first and second memory means operating in such a manner that one of said first and second memory means operates in the storing mode and the other operates in the outputting mode; counting means for counting a number of the coded data outputted from one of said first and second memory means after renewal of a content of said one of said first and second memory means; and memory renewal decision means for outputting a command so as to change the operating mode of each of said first and second memory means from one of the storing mode and the outputting mode to the other when a count value of said counting means exceeds a predetermined value.

Claim 23

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: decoding means for decoding a predetermined coded video signal containing intra-picture coded data in the input coded video signal to obtain a decoded video signal; and data compression means for high efficiency coding said decoded video signal at a compression rate greater than a compression rate of the input coded video signal to obtain said important data.

Claim 24

A video signal recording apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting all or the remaining part of the input coded video signal as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; and data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium, wherein said important data generating means comprises: decoding means for decoding a predetermined coded video signal containing intra-picture coded data in the input coded video signal to obtain a decoded video signal; and data compression means for high efficiency coding said decoded video signal at a compression rate greater than a compression rate of the input coded video signal to obtain said important data.

Claim 25

The video signal recording apparatus as claimed in claim 19, wherein said predetermined coded video signal is a predetermined picture containing intra-picture coded data.

Claim 26

The video signal recording apparatus as claimed in claim 19, wherein said predetermined coded video signal is a predetermined intra-picture coded pixel.

Claim 27

A video signal recording and reproducing apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting the input coded video signal as is as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium; data reproducing means for reproducing the data recorded in said recording medium; and reproduction control means operable in a high speed reproduction mode for controlling said data reproducing means to reproduce said important data recorded in said recording medium.

Claim 28

A video signal recording and reproducing apparatus for recording on a recording medium an input coded video signal containing intra-picture coded data and inter-picture coded data, comprising: important data generating means for generating important data from a part of the input coded video signal that contains intra-picture coded data, said important data generating means outputting the input coded video signal as is as normal data; data arranging means for arranging said important data and said normal data in such an order that said important data is recorded in a specific area of the recording medium and said normal data is recorded in the remaining area of the recording medium; data recording means for recording said important data and said normal data into said specific area and the remaining area, respectively, of the recording medium; data reproducing means for reproducing the data recorded in said recording medium; and reproduction control means operable in a high speed reproduction mode for controlling said data reproducing means to reproduce said important data recorded in said recording medium.

Claim 29

The video signal recording and reproducing apparatus as claimed in claim 22, wherein said recording medium is a recording tape on which continuous tracks are formed, and wherein said data arranging means arranges said important data and said normal data in such a manner that continuous k1 tracks (k1 is a positive integer) in which said important data is allocated and continuous k2 tracks (k2 is a positive integer) in which only said normal data is allocated are alternately repeatedly recorded.

Claim 30

The video signal recording and reproducing apparatus as claimed in claim 23, wherein said data reproducing means performs reproduction in said high speed reproduction mode at a speed of ±m multiple of a normal speed where m is a positive integer, and wherein said continuous k1 tracks and continuous k2 tracks satisfy a condition expressed as k1+k2=m.

Claim 31

The video signal recording and reproducing apparatus as claimed in claim 23, satisfying a condition of k1 =1.

Claim 32

The video signal recording and reproducing apparatus as claimed in claim 23, satisfying a condition of k1 =2.

Claim 33

The video signal recording and reproducing apparatus as claimed in claim 23, wherein said data reproducing means performs reproduction in said high speed reproduction mode at a speed of ±m multiple of a normal speed, where m is a positive integer, wherein said data arranging means arranges said important data and said normal data such that said normal data is recorded at a period of n tracks, where n is an integer multiple of m, and wherein said continuous k1 tracks and continuous k2 tracks satisfy a condition expressed as k1+k2=n.

Claim 34

The video signal recording and reproducing apparatus as claimed in claim 22, wherein said recording medium is a recording tape on which continuous tracks are formed and said data reproducing means includes a reproducing head scanning the continuous tracks, and wherein said reproduction control means controls said recording tape so as to run at a normal speed when any tracks where said important data is recorded is scanned by said reproducing head and at a higher speed than the normal speed when the remaining track is scanned by said reproducing head.