Digital recording and/or reproduction apparatus of video signal rearranging components within a fixed length block

Claim 1

An apparatus for recording digitally a supplied digital video signal, comprising: means for forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, means for forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, means for coding said digital video signal for each of said small blocks constituting said large block, means for controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, means for dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, means for rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, and means for recording said rearranged plurality of recording blocks on said recording medium.

Claim 2

An apparatus for recording digitally a supplied digital video signal, comprising: means for forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, means for forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, means for coding said digital video signal for each of said small blocks constituting said large block, means for controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, means for dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, means for rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, and means for recording said rearranged plurality of recording blocks on said recording medium.

Claim 4

An apparatus for reproducing digitally a recorded digital video signal, at the time of recording said digital video signal, a plurality of small blocks are formed each including a plurality of pixels in the horizontal direction and the vertical direction of a supplied digital signal to be recorded, a plurality of large blocks are formed each including a plurality of said small blocks located distant from each other on a screen, said digital video signal is coded for each of said small blocks constituting said large block, a fixed length block is formed by controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant, said fixed length block is divided into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, said plurality of recording blocks are rearranged on the basis of said recording block so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, said rearranged plurality of recording blocks are recorded on said recording medium, said digital reproduction apparatus comprising: means for detecting a plurality of said recording blocks recorded on said recording medium, means for rearranging said detected recording blocks on the basis of said recording block to be in the original order prior to recording, means for reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, means for decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and means for rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 5

An apparatus for reproducing digitally a recorded digital video signal, at the time of recording said digital video signal, a plurality of small blocks are formed each including a plurality of pixels in the horizontal direction and the vertical direction of a supplied digital signal to be recorded, a plurality of large blocks are formed each including a plurality of said small blocks located distant from each other on a screen, said digital video signal is coded for each of said small blocks constituting said large block, a fixed length block is formed by controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant, said fixed length block is divided into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, said plurality of recording blocks are rearranged on the basis of said recording block so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, said rearranged plurality of recording blocks are recorded on said recording medium, said digital reproduction apparatus comprising: means for detecting a plurality of said recording blocks recorded on said recording medium, means for rearranging said detected recording blocks on the basis of said recording block to be in the original order prior to recording, means for reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, means for decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and means for rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 6

An apparatus for recording digitally a supplied digital video signal and for reproducing digitally a recorded digital video signal, comprising: means for forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, means for forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, means for coding said digital video signal for each of said small blocks constituting said large block, means for controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, means for dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, means for rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, means for recording said rearranged plurality of recording blocks onto said recording medium, means for detecting said plurality of said recording blocks recorded on said recording medium, means for rearranging said detected recording blocks to be in the original order prior to recording, means for reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, means for decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and means for rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 7

An apparatus for recording digitally a supplied digital video signal and for reproducing digitally a recorded digital video signal, comprising: means for forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, means for forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, means for coding said digital video signal for each of said small blocks constituting said large block, means for controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, means for dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, means for rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, means for recording said rearranged plurality of recording blocks onto said recording medium, means for detecting said plurality of said recording blocks recorded on said recording medium, means for rearranging said detected recording blocks to be in the original order prior to recording, means for reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, means for decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and means for rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 9

An apparatus for recording digitally a video signal, comprising: small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding said video signal for each small block; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; and recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said recording block processing means rearranges small blocks having their main components included in recording blocks adjacent on said recording medium, to be adjacent on said screen.

Claim 10

An apparatus for recording digitally a video signal, comprising: small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding said video signal for each small block; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; and recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said recording block processing means rearranges small blocks having their main components included in recording blocks adjacent on said recording medium, to be adjacent on said screen.

Claim 12

An apparatus for reproducing digitally a video signal recorded by small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding a video signal for each small block; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; and recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming a large block are included in separate recording blocks, and said recording block processing means rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on a screen, said apparatus comprising: recording block reproducing means for detecting a digital signal thus recorded on said recording medium and for correcting an error when such error has occurred in the reproduction and for rearranging the detected digital signal in the original order to obtain said recording block; concealing means for reducing undesired effect to picture quality when an error could not be corrected by said recording block reproducing means; means for reconstructing a fixed length block from a plurality of recording blocks forming said large block; and decoding means for decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said concealing means carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in said recording block including the main component of said small block.

Claim 13

An apparatus for reproducing digitally a video signal recorded by small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding a video signal for each small block; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; and recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming a large block are included in separate recording blocks, and said recording block processing means rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on a screen, said apparatus comprising: recording block reproducing means for detecting a digital signal thus recorded on said recording medium and for correcting an error when such error has occurred in the reproduction and for rearranging the detected digital signal in the original order to obtain said recording block; concealing means for reducing undesired effect to picture quality when an error could not be corrected by said recording block reproducing means; means for reconstructing a fixed length block from a plurality of recording blocks forming said large block; and decoding means for decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said concealing means carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in said recording block including the main component of said small block.

Claim 15

An apparatus for recording and reproducing digitally a video signal, comprising: small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding said video signal for each small blocks; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said recording block processing means rearranges small blocks, having their main components included in recording blocks adjacent on a recording medium, to be adjacent on said screen, recording block reproducing means for detecting a digital signal thus recorded on said recording medium and for correcting an error when such error has occurred in the reproduction and for rearranging the detected digital signal in the original order to obtain said recording block; concealing means for reducing undesired effect to picture quality when an error could not be corrected by said recording block reproducing means; means for reconstructing a fixed length block from a plurality of recording blocks forming said large block; and decoding means for decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said concealing means carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in a recording block including the main component of said small block.

Claim 16

An apparatus for recording and reproducing digitally a video signal, comprising: small blocking means for grouping a plurality of pixels for forming a plurality of small blocks; coding means for coding said video signal for each small blocks; large blocking means for grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; means for constituting a fixed length block by controlling the amount of codes coded by said coding means to be constant for each large block; means for dividing said fixed length block into a plurality of recording blocks; recording block processing means for applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said large blocking means forms each large block from a plurality of small blocks located apart from each other on a screen, said means for dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said recording block processing means rearranges small blocks, having their main components included in recording blocks adjacent on a recording medium, to be adjacent on said screen, recording block reproducing means for detecting a digital signal thus recorded on said recording medium and for correcting an error when such error has occurred in the reproduction and for rearranging the detected digital signal in the original order to obtain said recording block; concealing means for reducing undesired effect to picture quality when an error could not be corrected by said recording block reproducing means; means for reconstructing a fixed length block from a plurality of recording blocks forming said large block; and decoding means for decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said concealing means carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in a recording block including the main component of said small block.

Claim 18

A method for recording digitally a supplied digital video signal, comprising the steps of: (a) forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal; (b) forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen; (c) coding said digital video signal for each of said small blocks constituting said large block; (d) controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block; (e) dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks; (f) rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium; and (g) recording said rearranged plurality of recording blocks on said recording medium.

Claim 19

A method for recording digitally a supplied digital video signal, comprising the steps of: (a) forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal; (b) forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen; (c) coding said digital video signal for each of said small blocks constituting said large block; (d) controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block; (e) dividing said fixed length block into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks; (f) rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium; and (g) recording said rearranged plurality of recording blocks on said recording medium.

Claim 20

A method for reproducing digitally a recorded digital video signal, at the time of recording said digital video signal, a plurality of small blocks are formed each including a plurality of pixels in the horizontal direction and the vertical direction of a supplied digital signal to be recorded, a plurality of large blocks are formed each including a plurality of said small blocks located distant from each other on a screen, said digital video signal is coded for each of said small blocks constituting said large block, a fixed length block is formed by controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant, said fixed length block is divided into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, said plurality of recording blocks are rearranged on the basis of said recording block so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, said rearranged plurality of recording blocks are recorded on said recording medium, said digital reproduction method comprising the steps of: (a) detecting a plurality of said recording blocks recorded on said recording medium, (b) rearranging said detected recording blocks on the basis of said recording block to be in the original order prior to recording, (c) reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, (d) decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and (e) rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 21

A method for reproducing digitally a recorded digital video signal, at the time of recording said digital video signal, a plurality of small blocks are formed each including a plurality of pixels in the horizontal direction and the vertical direction of a supplied digital signal to be recorded, a plurality of large blocks are formed each including a plurality of said small blocks located distant from each other on a screen, said digital video signal is coded for each of said small blocks constituting said large block, a fixed length block is formed by controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant, said fixed length block is divided into a plurality of recording blocks so that respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, said plurality of recording blocks are rearranged on the basis of said recording block so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, said rearranged plurality of recording blocks are recorded on said recording medium, said digital reproduction method comprising the steps of: (a) detecting a plurality of said recording blocks recorded on said recording medium, (b) rearranging said detected recording blocks on the basis of said recording block to be in the original order prior to recording, (c) reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, (d) decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and (e) rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 22

A method for recording digitally a supplied digital video signal and for reproducing digitally a recorded digital video signal, comprising the steps of: (a) forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, (b) forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, (c) coding said digital video signal for each of said small blocks constituting said large block, (d) controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, (e) dividing said fixed length block into a plurality of recording blocks so that the respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, (f) rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, (g) recording said rearranged plurality of recording blocks onto said recording medium, (h) detecting said plurality of said recording blocks recorded on said recording medium, (i) rearranging said detected recording blocks to be in the original order prior to recording, (j) reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, (k) decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and (l) rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 23

A method for recording digitally a supplied digital video signal and for reproducing digitally a recorded digital video signal, comprising the steps of: (a) forming a plurality of small blocks, each including a plurality of pixels in the horizontal direction and the vertical direction of said digital video signal, (b) forming a plurality of large blocks, each including a plurality of said small blocks located distant from each other on a screen, (c) coding said digital video signal for each of said small blocks constituting said large block, (d) controlling the code amount for each said large block so that the total code amount of the plurality of said small blocks constituting said large block is constant to form a fixed length block, (e) dividing said fixed length block into a plurality of recording blocks so that the respective main components of the plurality of said small blocks constituting said fixed length block are included separately in the plurality of recording blocks, (f) rearranging said plurality of recording blocks so that recording blocks including the main components of small blocks adjacent to each other on a screen are also adjacent on a recording medium, (g) recording said rearranged plurality of recording blocks onto said recording medium, (h) detecting said plurality of said recording blocks recorded on said recording medium, (i) rearranging said detected recording blocks to be in the original order prior to recording, (j) reconstructing said fixed length block from the plurality of said recording blocks constituting said large block, (k) decoding said digital video signal for each of the plurality of said small blocks constituting said reconstructed fixed length block, and (l) rearranging the plurality of small blocks constituting said fixed length block to restore pixels corresponding to the digital video signal at the time of recording.

Claim 24

A method for recording digitally a video signal, comprising the steps of: (a) grouping a plurality of pixels to form a plurality of small blocks; (b) coding said video signal for each small block; (c) grouping said plurality of small blocks to form a plurality of large blocks; (d) constituting a fixed length block by controlling the amount of codes in step (b) to be constant for each large block; (e) dividing said fixed length block into a plurality of recording blocks; and (f) applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step (c) forms each large block from a plurality of small blocks located apart from each other on a screen, said step (e) caries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said step (f) rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on said screen.

Claim 25

A method for recording digitally a video signal, comprising the steps of: (a) grouping a plurality of pixels to form a plurality of small blocks; (b) coding said video signal for each small block; (c) grouping said plurality of small blocks to form a plurality of large blocks; (d) constituting a fixed length block by controlling the amount of codes in step (b) to be constant for each large block; (e) dividing said fixed length block into a plurality of recording blocks; and (f) applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step (c) forms each large block from a plurality of small blocks located apart from each other on a screen, said step (e) caries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said step (f) rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on said screen.

Claim 26

A method for reproducing digitally a video signal recorded by grouping a plurality of pixels for forming a plurality of small blocks; coding a video signal for each small block; grouping said plurality of small blocks for forming a plurality of large blocks; constituting a fixed length block by controlling the amount of codes coded by said coding step to be constant for each large block; dividing said fixed length block into a plurality of recording blocks; and applying coding to said recording block to correct an error to be generated in reproduction and rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step of grouping said plurality of small blocks forms each large block from a plurality of small blocks located apart from each other on a screen, said step of dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming a large block are included in separate recording blocks, and said step of rearranging rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on a screen, said method comprising the steps of: (a) detecting a digital signal thus recorded on said recording medium and correcting an error when such error has occurred in the reproduction and rearranging the detected digital signal in the original order to obtain said recording block; (b) reducing undesired effect to picture quality when an error could not be corrected in step (a); (c) reconstructing a fixed length block from a plurality of recording blocks forming said large block; and (d) decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said step (b) carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in said recording block including the main component of said small block.

Claim 27

A method for reproducing digitally a video signal recorded by grouping a plurality of pixels for forming a plurality of small blocks; coding a video signal for each small block; grouping said plurality of small blocks for forming a plurality of large blocks; constituting a fixed length block by controlling the amount of codes coded by said coding step to be constant for each large block; dividing said fixed length block into a plurality of recording blocks; and applying coding to said recording block to correct an error to be generated in reproduction and rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step of grouping said plurality of small blocks forms each large block from a plurality of small blocks located apart from each other on a screen, said step of dividing said fixed length block carries out dividing so that components important to decode respective small blocks forming a large block are included in separate recording blocks, and said step of rearranging rearranges small blocks, having their main components included in recording blocks adjacent on said recording medium, to be adjacent on a screen, said method comprising the steps of: (a) detecting a digital signal thus recorded on said recording medium and correcting an error when such error has occurred in the reproduction and rearranging the detected digital signal in the original order to obtain said recording block; (b) reducing undesired effect to picture quality when an error could not be corrected in step (a); (c) reconstructing a fixed length block from a plurality of recording blocks forming said large block; and (d) decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said step (b) carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in said recording block including the main component of said small block.

Claim 28

A method for recording and reproducing digitally a video signal, comprising the steps of: (a) grouping a plurality of pixels for forming a plurality of small blocks; (b) coding said video signal for each small block; (c) grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; (d) constituting a fixed length by controlling the amount of codes coded in said step (b) to be constant for each large block; (e) dividing said fixed length block into a plurality of recording blocks; (f) applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step (c) forms each large block from a plurality of small blocks located apart from each other on a screen, said step (e) carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said step (f) rearranges small blocks, having their main components included in recording blocks adjacent on a recording medium, to be adjacent on said screen; (g) detecting a digital signal thus recorded on said recording medium and correcting an error when such error has occurred in the reproduction and rearranging the detected digital signal in the original order to obtain said recording block; (h) reducing undesired effect to picture quality when an error could not be corrected in step (g); (i) reconstructing a fixed length block from a plurality of recording blocks forming said large block; and (j) decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said step (h) carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in a recording block including the main component of said small block.

Claim 29

A method for recording and reproducing digitally a video signal, comprising the steps of: (a) grouping a plurality of pixels for forming a plurality of small blocks; (b) coding said video signal for each small block; (c) grouping said plurality of small blocks obtained by said small blocking means for forming a plurality of large blocks; (d) constituting a fixed length by controlling the amount of codes coded in said step (b) to be constant for each large block; (e) dividing said fixed length block into a plurality of recording blocks; (f) applying coding to said recording block to correct an error to be generated in reproduction and carrying out rearranging of the recording blocks for recording the rearranged recording blocks on a recording medium; wherein said step (c) forms each large block from a plurality of small blocks located apart from each other on a screen, said step (e) carries out dividing so that components important to decode respective small blocks forming said large block are included in separate recording blocks, and said step (f) rearranges small blocks, having their main components included in recording blocks adjacent on a recording medium, to be adjacent on said screen; (g) detecting a digital signal thus recorded on said recording medium and correcting an error when such error has occurred in the reproduction and rearranging the detected digital signal in the original order to obtain said recording block; (h) reducing undesired effect to picture quality when an error could not be corrected in step (g); (i) reconstructing a fixed length block from a plurality of recording blocks forming said large block; and (j) decoding coded data in said fixed length block to obtain pixels in respective small blocks included in said fixed length block, wherein said step (h) carries out decoding by substituting a component which is not so important with a suitable value even if there is an error in a recording block including said component which is not so important when there is an error in a recording block including the main component of said small block.