Residual And Coefficient Coding With Transform Skip Control

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Solution Overview

Problem

Existing video coding standards like HEVC and VVC face challenges in achieving superior coding efficiency and managing large block-size transforms and virtual pipeline data units (VPDUs) in video decoding, leading to increased complexity and resource utilization.

Innovation Solution

Implementing a method for video decoding that includes receiving a control flag and syntax elements to enable transform skip slices, entropy decoding based on these flags, and applying normative partition restrictions to manage large block sizes and VPDU sizes effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If transform skip slices are implemented to improve coding efficiency, then compression performance is improved, but decoder complexity increases due to additional control flags and syntax elements

Engineering Contradiction:

Improvecoding efficiencyVSAvoiddecoder complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic control of transform skip slice processing through control flags and syntax elements that are adaptively parsed during decoding. The decoder dynamically adjusts its behavior based on the presence of these flags, enabling transform skip slices only when beneficial for coding efficiency while maintaining standard compliance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the decoder by introducing control flags and syntax elements that modify the decoding process. When these flags indicate transform skip slice mode, the decoder applies different processing rules, effectively changing parameters such as transform application and entropy decoding behavior to improve compression performance.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If large block-size transforms are used to improve compression, then coding efficiency is improved, but computational complexity and resource utilization increase

Engineering Contradiction:

Improvecompression efficiencyVSAvoidcomputational complexity

Core Design Contradiction:

ProductivityVSPower

Solution Approach 1:

The patent segments the video data into transform skip slices that can be processed independently with large block sizes where beneficial, while other regions use standard transform processing. This segmentation allows the system to apply computationally intensive large-block transforms only where they provide compression benefits, rather than uniformly across all video data.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial transform skip processing by using control flags to selectively enable transform skip slices only in regions where they improve compression efficiency. Rather than applying large-block transforms excessively throughout the entire video stream, the system applies them partially and selectively based on content characteristics and coding benefits.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12425661B2Residual and coefficients coding for video coding

Publication Date: 2025.09.23 BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

AI summary

Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding. A decoder may receive a video stream. The decoder may receive a control flag in a slice header level. The decoder may receive at least one syntax element in the slice header level. The decoder may entropy decode the video bitstream based on the control flag and the at least one syntax element.