CPC H04N 19/30 (2014.11) [H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/17 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/187 (2014.11); H04N 19/44 (2014.11); H04N 19/467 (2014.11)] | 2 Claims |
1. A method of decoding a digital video signal, comprising:
receiving in a video decoder a bitstream containing the digital video signal, the bitstream comprising a base layer and an enhancement layer;
receiving one or more sets of parameters, each associated with a respective one of a plurality of sub-pictures in the bitstream, each of the subpictures having a different spatial position within a picture relative to other said subpictures;
decoding base layer values in a first color space in said base layer;
within each of the sub-pictures, performing a reverse color mapping operation on said base layer values within each respective subpicture using the set of parameters respectively associated with the respective sub-picture, to generate a reconstructed reference picture having values in a second color space wider than said first color space, wherein said reverse color mapping operation for each respective subpicture maps a color in the first color space of the base layer to a color in the second color space of the base layer, wherein the mapping of a color in the first color space to a color in the second color space differs between at least two of the plurality of sub-pictures; and
decoding enhancement layer values in said second color space in said enhancement layer using prediction based on said reconstructed reference picture and providing the decoder output to a video player; wherein
the decoding of the enhancement layer comprises decoding a current sub-picture with reference to the re-mapped sub-pictures output.
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