SUPPLEMENTAL ENHANCEMENT INFORMATION (SEI) MESSAGES FOR HIGH DYNAMIC RANGE AND WIDE COLOR GAMUT VIDEO CODING

摘要

This disclosure relates to processing video data, including processing video data that is represented by an HDR/WCG color representation. In accordance with one or more aspects of the present disclosure, one or more Supplemental Enhancement Information (SEI) Messages may be used to signal syntax elements and or other information that allow a video decoder or video postprocessing device to reverse the dynamic range adjustment (DRA) techniques of this disclosure to reconstruct the original or native color representation of the video data. Dynamic range adjustment (DRA) parameters may be applied to video data in accordance with one or more aspects of this disclosure in order to make better use of an HDR/WCG color representation, and may include the use of global offset values, as well as local scale and offset values for partitions of color component values.

主权项

1. A method of decoding video data that has been adjusted by performing a dynamic range adjustment, the method comprising:
receiving at least one supplemental enhancement information (SEI) message from an encoded video bitstream, the at least one SEI message indicating adjustment information specifying how the dynamic range adjustment has been applied to the video data, and wherein the adjustment information includes a global offset value that applies to each of one or more partitions into which the video data was partitioned during the dynamic range adjustment; and performing an inverse dynamic range adjustment on the video data in accordance with the adjustment information to generate unadjusted component values from the video data.