Encoding and decoding methods, apparatus, and storage media

By employing bypass-based and context-based adaptive binary arithmetic encoding/decoding strategies for specific syntax elements and prediction modes, the complexity and memory overhead in image encoding/decoding are reduced, improving process efficiency.

JP7866157B2Active Publication Date: 2026-05-26HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
Filing Date
2026-02-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The complexity and memory overhead in image encoding and decoding processes are high due to the need for multiple context models for context-based adaptive binary arithmetic encoding and decoding of syntax elements, particularly for ISP instruction information and motion vector differences.

Method used

Implementing bypass-based binary arithmetic encoding or decoding for certain ISP instruction information and context-based adaptive binary arithmetic encoding or decoding for others, using a single context model for reference row indication in specific conditions, and applying different context models based on block characteristics for various prediction modes.

Benefits of technology

Reduces the complexity and memory overhead in the encoding and decoding processes by optimizing the use of context models, enhancing efficiency and reducing resource utilization.

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Abstract

This invention discloses encoding and decoding methods, apparatus, and storage media belonging to the field of image processing technology. [Solution] The method includes, when it is determined to encode or decode the first ISP instruction information, performing context-based adaptive binary arithmetic encoding or context-based adaptive binary arithmetic decoding on the first ISP instruction information based on one context model, wherein the first ISP instruction information is used to indicate whether to activate the intra subblock prediction mode; and when it is determined to encode or decode the second ISP instruction information, performing bypass-based binary arithmetic encoding or decoding on the second ISP instruction information, wherein the second ISP instruction information is used to indicate the subblock partitioning scheme of the intra subblock prediction mode. In this way, the number of context models required for the encoding and decoding process can be reduced, the complexity of the encoding and decoding process can be reduced, and memory overhead can be reduced.
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