Video image coding and recording apparatus and video image coding, recording and reproducing apparatus

Claim 2

The apparatus according to claim 1, wherein said recording means (50, 60, 70) includes means (50) for coding the coefficient data of the plurality of second coefficient data blocks on a second coefficient data block by second coefficient data block basis to obtain coded data, wherein said recording means records said coded data on the recording medium.

Claim 3

The apparatus according to claim 1 or 2, wherein said shuffling means (40, 42, 43) shuffles the coefficient data such that coefficient data orthogonally transformed from pixel data contained in two coding blocks which are adjacent to each other on a video screen are recorded in recording areas which are distant from one another on the recording medium.

Claim 4

The apparatus according to claim 1 or 2, wherein said shuffling means (40, 42, 43) shuffles the coefficient data such that coefficient data orthogonally transformed from pixel data contained in two coding blocks which belong to different fields from each other and are the same in position on a video screen are recorded in recording areas which are distant from one another on the recording medium.

Claim 5

The apparatus according to claim 1 or 2, wherein the plurality of coefficient data in each of the plurality of first coefficient data blocks are divided into low frequency coefficient data and high frequency coefficient data, and said shuffling means (40, 42, 43) shuffles at least the low frequency coefficient data such that each of the plurality of second coefficient data blocks contains low frequency coefficient data which are derived from at least two of the plurality of first coefficient data blocks.

Claim 6

The apparatus according to claim 1 or 2, wherein said block forming means (25) forms the plurality of coding blocks so that two coding blocks which are adjacent to each other on a video screen overlap to contain in common an overlapped part of pixel data at a boundary between the two coding blocks.

Claim 7

The apparatus according to claim 1 or 2, wherein said shuffling means (43) divides the coefficient data in each of the plurality of first coefficient data blocks into a plurality of coefficient data groups, and shuffles the coefficient data on a coefficient data group by coefficient data group basis such that each of the plurality of second coefficient data blocks contains coefficient data groups which are derived from at least two of the plurality of first coefficient data blocks.

Claim 8

The apparatus according to claim 7, wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups which are different from one another in vertical frequency.

Claim 9

The apparatus according to claim 7, wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups which are different from one another in horizontal frequency.

Claim 10

The apparatus according to claim 7, wherein the coefficient data in each of the plurality of first coefficient data blocks are divided into a part of horizontal low frequency coefficient data and a part of horizontal high frequency coefficient data, and wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups such that the part of horizontal low frequency coefficient data is divided into coefficient data groups which are different from one another in vertical frequency and the part of the horizontal high frequency coefficient data forms a single group.

Claim 11

The apparatus according to claim 7, wherein the coefficient data in each of the plurality of first coefficient data blocks are divided into a part of vertical low frequency coefficient data and a part of vertical high frequency coefficient data and wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups such that the part of vertical low frequency coefficient data is divided into coefficient data groups which are different from one another in horizontal frequency and the part of the vertical high frequency coefficient data forms a single group.

Claim 12

The apparatus according to claim 7, wherein the shuffling means shuffles the coefficient data such that all of the coefficient data groups of adjacent two of the plurality of first coefficient data blocks are recorded in areas which are distant from one another on the recording medium.

Claim 13

A video image coding, recording and reproducing apparatus comprising: block forming means (20, 25) for dividing a digital video signal to form a plurality of coding blocks each consisting of a plurality of pixel data; orthogonal transforming means (30) for orthogonally transforming the pixel data in each of the coding blocks to obtain a plurality of first coefficient data blocks each consisting of a plurality of coefficient data orthogonally transformed from the plurality of pixel data contained in a corresponding one of the plurality of coding blocks; first rearranging means (40, 42, 43) for rearranging the coefficient data over at least two of the plurality of first coefficient data blocks to obtain rearranged coefficient data; and recording means (50, 60, 70) for recording the rearranged coefficient data on a recording medium, reproducing means (90, 100, 110) for reproducing the recorded coefficient data from the recording medium to obtain reproduced coefficient data; second rearranging means (120, 122) for inversely rearranging the reproduced coefficient data to obtain reproduced coefficient data in the form of the plurality of first coefficient data blocks; error correcting means (130, 132, 133) for correcting a erroneous coefficient data contained in the reproduced coefficient data to obtain an error corrected coefficient data; and means (140) for inverse orthogonally transforming the reproduced coefficient data including the error corrected coefficient data to obtain a reproduced digital video signal, characterized in that: said first rearranging means comprises shuffling means (40, 42, 43) for shuffling the coefficient data over at least two of the plurality of first coefficient data blocks so that a part of the coefficient data in each of the plurality of first coefficient data blocks is replaced by coefficient data of the same conversion degree contained in another of the plurality of first coefficient data blocks to form a plurality of second coefficient data blocks each containing a plurality of coefficient data which are derived from at least two of the plurality of first coefficient data blocks, said recording means (50, 60, 70) recording the plurality of second coefficient data blocks on the recording medium, whereby at least some of the coefficient data contained in each of the plurality of first coefficient data blocks are distributed to different recording areas from one another on the recording medium; said second rearranging means comprises de-shuffling means (120, 122) for de-shuffling the reproduced coefficient data to obtain the reproduced coefficient data in the form of the plurality of first coefficient data blocks; and said error correcting means (130, 132, 133) corrects the erroneous coefficient data by using a reproduced coefficient data which does not contain an error to obtain the error corrected coefficient data.

Claim 14

The apparatus according to claim 13, wherein said recording means (50, 60, 70) includes means (50) for coding the coefficient data of the plurality of second coefficient data blocks on a second coefficient data block by second coefficient data block basis to obtain coded data, said recording means recording said coded data on the recording medium, and wherein said reproducing means (90, 100, 110) reproduces the recorded coded data from the recording medium to obtain reproduced coded data, and includes means (110) for decoding the reproduced coded data to obtain the reproduced coefficient data in the form of the plurality of second coefficient data blocks;

Claim 15

The apparatus according to claim 13 or 14, wherein said error correcting means (130, 132, 133) corrects the erroneous coefficient data by using a reproduced coefficient data of the same conversion degree as the erroneous coefficient data and which is contained in a first coefficient data block corresponding to a coding block which is adjacent on a video screen to a coding block which corresponds to a first coefficient data block containing the erroneous coefficient data.

Claim 16

The apparatus according to claim 13 or 14, wherein said error correcting means (130, 132, 133) corrects the erroneous coefficient data by using a reproduced coefficient data of the same conversion degree as the erroneous coefficient data and which is contained in a first coefficient data block corresponding to a coding block which is different in belonging field from and is the same in position on a video screen to a coding block which corresponds to a first coefficient data block containing the erroneous coefficient data.

Claim 17

The apparatus according to claim 13 or 14, wherein said error correcting means (130, 132, 133) corrects the erroneous coefficient data by using a pixel correlation at a boundary between two coding blocks which are adjacent to each other.

Claim 18

The apparatus according to claim 13 or 14, wherein said block forming means (25) forms the plurality of coding blocks so that two coding blocks which are adjacent to each other on a video screen overlap to contain in common an overlapped part of pixel data at a boundary between the two coding blocks, and wherein said error correcting means (132, 133) corrects the erroneous coefficient data so that the overlapped part of reproduced pixel data becomes the same in the two coding blocks containing the overlapped part of reproduced pixel data.

Claim 19

The apparatus according to claim 13 or 14, wherein said shuffling means (43) divides the coefficient data in each of the plurality of first coefficient data blocks into a plurality of coefficient data groups, and shuffles the coefficient data on a coefficient data group by coefficient data group basis such that each of the plurality of second coefficient data blocks contains coefficient data groups which are derived from at least two of the plurality of first coefficient data blocks.

Claim 20

The apparatus according to claim 19, wherein shuffling means (3) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups which are different from one another in vertical frequency, and said error correcting means (133) corrects the erroneous coefficient data by using a pixel correlation at a boundary between coding blocks which are adjacent to each other in a horizontal direction on a video screen.

Claim 21

The apparatus according to claim 19, wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups which are different from one another in horizontal frequency, and said error correcting means (133) corrects the erroneous coefficient data by using a pixel correlation at a boundary between coding blocks which are adjacent to each other in a vertical direction on a video screen.

Claim 22

The apparatus according to claim 19, wherein the coefficient data in each of the plurality of first coefficient data blocks are divided into a part of horizontal low frequency coefficient data and a part of horizontal high frequency coefficient data, wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups such that the part of horizontal low frequency coefficient data is divided into coefficient data groups which are different from one another in vertical frequency and the part of the horizontal high frequency coefficient data forms a single group, and wherein said error correcting means (133) corrects the erroneous coefficient data in the horizontal low frequency coefficient data by using a pixel correlation at a boundary between coding blocks which are adjacent to each other in a horizontal direction on a video screen and corrects the erroneous coefficient data in the horizontal high frequency coefficient data to be 0.

Claim 23

The apparatus according to claim 19, wherein the coefficient data in each of the plurality of first coefficient data blocks are divided into a part of vertical low frequency coefficient data and a part of vertical high frequency coefficient data, wherein said shuffling means (43) divides the coefficient data in each of the first coefficient data blocks into a plurality of coefficient data groups such that the part of vertical low frequency coefficient data is divided into coefficient data groups which are different from one another in horizontal frequency and the part of the vertical high frequency coefficient data forms a single group, and wherein said error correcting means (133) corrects the erroneous coefficient data in the vertical low frequency coefficient data by using a pixel correlation at a boundary between coding blocks which are adjacent to each other in a vertical direction on a video screen and corrects the erroneous coefficient data in the vertical high frequency coefficient data to be 0.

Claim 24

The apparatus according to claim 19, wherein said shuffling means (43) shuffles the coefficient data such that all of the coefficient data groups of adjacent two of the plurality of first coefficient data blocks are recorded in areas which are distant from one another on the recording medium.