Residual and Coefficient Coding for Video Coding - Patent application

JP2024524426A5Active Publication Date: 2025-04-14BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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Patent Information

Application Number
JP2023580760
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-06-28
Filing Date
2022-06-28
Publication Date
2025-04-14
Estimated Expiration
2042-06-28

AI Technical Summary

Technical Problem

Existing video coding techniques face challenges in efficiently compressing video data while maintaining video quality, particularly in adapting transform coefficients and residual encoding processes to optimize bit rates and minimize degradation.

Method used

The method involves adaptive allocation of transform coefficient scaling and residual encoding processes, including the use of SPS coefficient enable flags, transform precision adaptation, and bypass modes for syntax elements, to enhance video decoding efficiency.

Benefits of technology

This approach improves video coding efficiency by optimizing bit rates and maintaining video quality through adaptive transform coefficient scaling and residual encoding, suitable for various video coding standards including VVC, HEVC, and AVC.

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Abstract

A method, an apparatus, and a non-transitory computer-readable storage medium for video decoding are provided. In one method, a decoder receives a sequence parameter set (SPS) coefficient enable flag indicating whether a slice header (SH) coefficient enable flag is present in a slice header syntax structure that references an SPS. In a second method, the decoder can receive a sequence parameter set (SPS) transform precision adaptive enable flag indicating whether a scaling process of transform coefficients and a downshift in a transform process of scaled transform coefficients are adaptively assigned by inspecting coefficient values ​​of inverse quantization and inverse transform.
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