Method and apparatus for encoding and decoding video signal depending on characteristics of coefficients included in block of FGS layer
First Claim
1. A method of losslessly coding coefficients included in a block of a fine granularity scalability (FGS) layer constituting a video signal having a multi-layer structure, the method comprising:
- extracting non-unitary coefficients of the block that have absolute values that are not 0 or 1;
calculating a representative value from run values of the non-unitary coefficients which are extracted;
comparing the run values of the non-unitary coefficients of the block and the representative value; and
assigning codewords to the non-unitary coefficients according to a result of the comparing.
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Abstract
Encoding and decoding video signals according to the characteristics of coefficients included in the block of a fine granularity scalability layer is provided. Non-unitary coefficients that constitute the block and have absolute values that are not 0 or 1 are extracted from the video signal, a representative value from run values of the extracted non-unitary coefficients is calculated, the run values of the coefficients constituting the block and the representative value are compared, and codewords are assigned to the coefficients according to a result of the comparison.
29 Citations
38 Claims
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1. A method of losslessly coding coefficients included in a block of a fine granularity scalability (FGS) layer constituting a video signal having a multi-layer structure, the method comprising:
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extracting non-unitary coefficients of the block that have absolute values that are not 0 or 1;
calculating a representative value from run values of the non-unitary coefficients which are extracted;
comparing the run values of the non-unitary coefficients of the block and the representative value; and
assigning codewords to the non-unitary coefficients according to a result of the comparing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of losslessly coding coefficients included in a block of a fine granularity scalability (FGS) layer constituting a coded video signal having a multi-layer structure, the method comprising:
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extracting a representative value that is added to the coded video signal;
extracting codewords from the coded video signal; and
for the representative value, and codewords belonging to first and second groups that are spaced apart from each other at a distance, transforming and decoding the codewords belonging to the first group and the codewords belonging to the second group using different methods. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An encoder for losslessly coding coefficients included in a block of a fine granularity scalability (FGS) layer constituting a video signal of a multi-layer structure, the encoder comprising:
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a non-unitary coefficient calculation unit which extracts non-unitary coefficients of a block and have absolute values that are not 0 or 1;
a representative value generating unit which calculates a representative value from run values of the non-unitary coefficients which are extracted; and
a coefficient encoding unit which compares each of the run values of the non-unitary coefficients constituting the block and the representative value, and assigns codewords to the non-unitary coefficients according to a result of the comparison. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A decoder for losslessly coding coefficients included in a block of a fine granularity scalability (FGS) layer constituting a coded video signal of a multi-layer structure, the decoder comprising:
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a representative value extraction unit which extracts a representative value added to the coded video signal; and
a coefficient decoding unit which extracts codewords from the coded video signal, and, for the representative value and codewords belonging to first and second groups that are spaced apart from each other at a distance, transforms and decodes the codeword belonging to the first group and the codeword belonging to the second group using different methods. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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Specification