Chroma Deblocking Syntax Signaling for Leaner Video Bitstreams

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Solution Overview

Problem

Existing video coding technologies face challenges in efficiently compressing video data without sacrificing picture quality, particularly in scenarios with limited network resources and increasing demands for higher video quality, due to inefficient signaling of deblocking control parameters for chroma components.

Innovation Solution

A conditional signaling scheme for deblocking control parameters is introduced, where these parameters are only signaled when the video sequence has a color component, and when the chroma format is not (4:0:0 or (4:4:4) and separate colour plane coding mode is used, thereby optimizing bitstream utilization and decoding efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If deblocking control parameters for chroma component are always signaled in bitstream, then decoding accuracy is improved, but bitstream size increases and decoding efficiency decreases

Engineering Contradiction:

Improvedecoding accuracyVSAvoidbitstream size

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent applies local quality by differentiating the signaling requirement for chroma component deblocking control parameters based on specific chroma formats. The parameters are conditionally signaled only when chroma format is not (4:0:0) and not (4:4:4) with separate colour plane coding mode, optimizing the balance between decoding accuracy and bitstream efficiency for different local conditions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of signaling presence based on chroma format conditions. By modifying the signaling behavior from unconditional to conditional based on chroma format, the system optimizes bitstream utilization while maintaining decoding accuracy for relevant cases.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If deblocking control parameters for chroma component are conditionally signaled, then bitstream utilization is improved, but decoding complexity increases

Engineering Contradiction:

Improvebitstream utilizationVSAvoiddecoding complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12483696B2Encoder, decoder and corresponding methods about signaling high level syntax

Publication Date: 2025.11.25 HUAWEI TECH CO LTD

AI summary

A method of coding is disclosed. The method comprises obtaining a bitstream for a coding block; obtaining a value of a syntax from the bitstream; obtaining a value of deblocking control parameter for chroma component of a slice of a coded picture from the bitstream, when the value of the syntax is equal to a preset value. The method comprises performing a deblocking process on a block in the slice according to the value of the deblocking control parameter.