Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A method for achieving inverse motion compensation in the compressed domain, where such information has been compressed in accordance with a discrete cosine transform (DCT) based compression scheme, the method comprising the steps of: Huffman decoding a compressed bitstream to extract a plurality of N x N DCT-based data blocks defining a picture T-1 and to extract a motion vector h,w ; processing n of said data blocks in accordance with at least one sampling matrix and with said motion vector to produce a single N x N DCT-based data block corresponding to a picture T , wherein n is used to define a region occupied by said picture T-1 , and wherein said single data block is a combination of a data block consisting of a determined average of said n data blocks.
Claim 2
Dependent Claim
68 words
The method of Claim 1, said processing step further comprising the step of: determining a DCT X of a current block from a given DCT E of a prediction error e of the current block, and DCTs X 1 ,..., X 4 of x 1 ,..., x 4 respectively, where and is a DCT of , such that is determined directly from X 1 ,..., X 4 .
Claim 3
Dependent Claim
97 words
The method of Claim 1, further comprising the step of: precomputing fixed matrices: and where Q 1 and Q 2 are N x N DCT-based matrices; where matrices U 1 = SQ 1 S -1 and K 1 = SQ 2 S -1 ; where a factorization S is represented as follows: S = DPB 1 B 2 MA 1 A 2 A 3 , where D is a fixed diagonal matrix, where P is a fixed permutation matrix; and where B 1 B 2 MA 1 A 2 A 3 are fixed N x N matrices.
Claim 4
Dependent Claim
14 words
The method of Claim 3, further comprising the step of: determining in accordance with:
Claim 5
Dependent Claim
14 words
The method of Claim 3, further comprising the step of: determining in accordance with:
Claim 6
Dependent Claim
14 words
The method of Claim 3, further comprising the step of: determining in accordance with:
Claim 7
Independent Claim
139 words
An apparatus (13) for achieving inverse motion compensation in the compressed domain, where such information has been compressed in accordance with a discrete cosine transform (DCT) based compression scheme, the apparatus comprising: a Huffman decoder (12) for decoding a compressed bitstream to produce a plurality of N x N DCT-based data blocks defining a picture T-1 and to produce a motion vector h,w ; a processor (30) processing n of said data blocks in accordance with at least one sampling matrix and with said motion vector to produce a single N x N DCT-based data block corresponding to a frame T , wherein n is used to define a region occupied by said frame T-1 , and wherein said single data block is a combination of a data block consisting of a determined average of said n data blocks.
Claim 8
Dependent Claim
65 words
The apparatus (13) of Claim 7, said processor further comprising: means (40) for determining a DCT X of a current block from a given DCT E of a prediction error e , and DCTs X 1 ,..., X 4 of x 1 ,..., x 4 respectively, where and is a DCT of , such that is determined directly from X 1 ,..., X 4 .
Claim 9
Dependent Claim
96 words
The apparatus of Claim 8, further comprising: means for precomputing fixed matrices: and where Q 1 and Q 2 are N x N DCT-based matrices; where matrices U 1 = SQ 1 S -1 and K 1 = SQ 2 S -1 ; where a factorization S is represented as follows: S = DPB 1 B 2 MA 1 A 2 A 3 , where D is a fixed diagonal matrix, where P is a fixed permutation matrix; and where B 1 B 2 MA 1 A 2 A 3 are N x N fixed matrices.
Claim 10
Dependent Claim
13 words
The apparatus of Claim 9, further comprising: means for determining in accordance with:
Claim 11
Dependent Claim
13 words
The apparatus of Claim 9, further comprising: means for determining in accordance with:
Claim 12
Dependent Claim
13 words
The apparatus of Claim 9, further comprising: means for determining in accordance with: