Self-adaptive prediction method for multi-layer codec

A method, comprising:

• generating, by a video decoder based on a number of previously decoded relatively low dynamic range image partitions and the same number of previously decoded relatively high dynamic range residual image partitions, the same number of previously reconstructed relatively high dynamic range image partitions, wherein the number is one or more, wherein each image partition in the previously reconstructed relatively high dynamic range image partitions is generated based on a respective corresponding image partition in the previously decoded relatively low dynamic range image partitions and a respective corresponding image partition in the previously decoded relatively high dynamic range residual image partitions, and wherein each image partition in the previously reconstructed relatively high dynamic range image partitions comprises reconstructed pixel values that have a higher dynamic range than pixel values of the respective corresponding image partition in the previously decoded relatively low dynamic range image partitions;
• collecting, by the video decoder, previous image partition statistic information relating to reconstructed pixel values of each image partition in the previously reconstructed relatively high dynamic range image partitions and pixel values of the respective corresponding image partition in the previously decoded relatively low dynamic range image partitions, wherein the collected previous image partition statistic information includes high dynamic range statistics of the reconstructed pixel values of each image in the previously reconstructed relatively high dynamic range images;
• deriving, by the video decoder from the collected previous image partition statistic information including the high dynamic range statistics of the reconstructed pixel values of each image in the previously reconstructed relatively high dynamic range images, one or more prediction parameters for a currently decoded relatively low dynamic range image partition that neighbors with the previously decoded relatively high dynamic range image partitions;
• generating, by the video decoder, a currently predicted image partition from the currently decoded relatively low dynamic range image partition based on the one or more prediction parameters derived from the collected previous image partition statistic information, the currently predicted image partition comprising predicted pixel values that have the higher dynamic range than pixel values of the currently decoded relatively low dynamic range image partition and that are predicted from the currently decoded pixel values of the currently decoded relatively low dynamic range image partition;
• decompressing, by the video decoder, a portion of enhancement layer (EL) image data in a multi-layer video signal into currently decoded residual pixel values;
• and
• combining, by the video decoder, the currently decoded residual pixel values with the currently predicted pixel values of the currently predicted image partition to generate a currently reconstructed relatively high dynamic range image partition, the currently reconstructed relatively high dynamic range image partition comprising currently reconstructed pixel values that have the higher dynamic range than the currently decoded pixel values of the currently decoded relatively low dynamic range image partition.