CPC H04N 19/124 (2014.11) [H04N 19/119 (2014.11); H04N 19/12 (2014.11); H04N 19/147 (2014.11); H04N 19/176 (2014.11); H04N 19/42 (2014.11); H04N 19/44 (2014.11); H04N 19/46 (2014.11); H04N 19/61 (2014.11); H04N 19/70 (2014.11)] | 4 Claims |
1. A decoding method comprising:
determining, using first information in a picture header of a picture and second information provided for a first block, whether or not a first quantization parameter to be used for decoding the first block is provided for a unit, the picture including the unit, the unit including the first block; and
decoding the first block,
wherein, when the first quantization parameter is determined to be provided, (i) the decoding includes deriving a value for dequantization by using the first quantization parameter and (ii) the first quantization parameter is used for other blocks included in the unit, and
wherein, when the first quantization parameter is determined not to be provided, the decoding includes deriving a value for dequantization by not using the first quantization parameter and by using a second quantization parameter which is provided for the first block.
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