CPC H04N 19/124 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/46 (2014.11)] | 19 Claims |
1. A method for inverse quantization of a picture block, the method comprising:
obtaining one or more existing quantization parameter (QP) values from a bitstream, wherein the one or more existing QP values are associated with a chrominance component of the picture block;
determining a QP value for the chrominance component of the picture block based on the one or more existing QP values; and
performing inverse quantization on the chrominance component of the picture block using the determined QP value;
wherein the one or more existing QP values comprises a QP value for a luminance component of the picture block collocated with the chrominance component of the picture block, wherein the QP value for the luminance component is not a delta QP value;
wherein determining the QP value for the chrominance component of the picture block based on the one or more existing QP values comprises:
determining the QP value for the chrominance component of the picture block based on the QP value for the luminance component of the picture block collocated with the chrominance component of the picture block.
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