Signaling chrominance quantization parameter (QP) mapping table
By signaling the dynamic chroma QP mapping table and segmented linear model in the video bitstream, the problem of low encoding and decoding efficiency of HDR and WCG video content in the prior art is solved, and more efficient is achieved video content modeling and codec performance.
Patent Information
- Application Number
- CN202080045108.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-06-24
- Filing Date
- 2020-06-25
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2040-06-25
AI Technical Summary
Existing video encoding standards, such as VVC draft 5, use of static chroma QP mapping tables leads to low encoding and decoding efficiency of high dynamic range (HDR) and wide color gamut (WCG) video content, and static chroma QP mapping tables Assuming the same Cb and Cr chrominance components, it is impossible to effectively model the characteristics of different chrominance components.
Signaling to notify the dynamic chromaticity QP mapping table in the video bitstream, using a segmented linear model, determine the quantization parameters of the chromaticity block of the video data based on the luminance QP value and the chromaticity QP mapping table, providing more flexible video content modeling .
The encoding and decoding efficiency of HDR and WCG video content is improved, and the suboptimal distortion and inefficiency of encoding and decoding are avoided due to static chromaticity QP mapping tables are provided, and a more general signaling mechanism is provided to adapt to different types of video content.
Smart Images
Figure CN113994678B_ABST