Cross-reference of applications related to cross-component sample adaptation offset

JP7863614B2Active Publication Date: 2026-05-21BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
Filing Date
2022-11-18
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing video coding technologies struggle to efficiently encode and decode luminance and chroma components, leading to suboptimal compression efficiency due to inadequate utilization of cross-component relationships.

Method used

Implementing a Cross-Component Sample Adaptive Offset (CCSAO) quantization method that utilizes an offset quantization control syntax and quantization step size to enhance encoding and decoding efficiency by leveraging cross-component relationships between luminance and chroma components.

Benefits of technology

Improves encoding efficiency by optimizing the compression of video data, reducing bitrate while maintaining video quality, and enhancing the performance of video coding standards like VVC and HEVC.

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Abstract

A method and device for video encoding are provided, in which a decoder obtains a cross-component sample adaptive offset (CCSAO) quantization associated with an offset quantization control syntax and a quantization step size predefined or indicated by an encoder at at least one level, and further obtains a CCSAO based on the CCSAO quantization and applies the CCSAO to a reconstructed sample for prediction.
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