Video Coding APS Types for Redundant Parameter Reduction

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Solution Overview

Problem

Existing video coding systems inefficiently manage adaptive loop filter (ALF) and reshaper/luma mapping with chroma scaling (LMCS) parameters, leading to redundant data transmission and resource wastage.

Innovation Solution

Introduce multiple types of adaptation parameter sets (APS) including ALF, scaling list, and LMCS APS, each coded as separate NAL units, with unique ID spaces and overlapping value spaces to avoid redundant coding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple types of APS (ALF, scaling list, LMCS) are coded as separate NAL units, then coding efficiency is improved and redundant data transmission is reduced, but device complexity increases due to multiple NAL unit types and ID spaces

Engineering Contradiction:

Improvecoding efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the monolithic APS structure into multiple specialized APS types (ALF APS, scaling list APS, LMCS APS), each handling specific parameter categories. This segmentation allows each APS type to be independently coded and transmitted only when needed, eliminating redundant transmission of unrelated parameters and improving coding efficiency despite increased structural complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts different parameter types from the unified APS and places them into separate APS types. Specifically, ALF parameters are extracted into ALF APS, scaling list parameters into scaling list APS, and LMCS parameters into LMCS APS. This extraction enables selective transmission of only the necessary parameter sets, reducing overall data redundancy.

Inventive Principle:

Principle #2Taking out (Extraction)

2Loss of substance

If multiple APS types with unique ID spaces are used, then redundant coding is avoided and network resource usage is reduced, but memory and processing resources at decoder increase

Engineering Contradiction:

Improvenetwork resource usageVSAvoidmemory and processing resources

Core Design Contradiction:

Loss of substanceVSDevice complexity

Solution Approach 1:

The patent assigns unique ID spaces to each APS type (ALF APS IDs, scaling list APS IDs, LMCS APS IDs), allowing each type to be independently identified and managed. This local quality approach enables the decoder to process and store only the relevant APS type based on the current coding context, reducing unnecessary memory allocation and processing overhead while minimizing network resource usage through targeted transmission.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260046426A1Adaptation Parameter Set Types in Video Coding

Publication Date: 2026.02.12 HUAWEI TECH CO LTD

AI summary

A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a first adaptation parameter set (APS) network abstraction layer (NAL) unit including an adaptive loop filter (ALF) type, a second APS NAL unit including a scaling list type, a third APS NAL unit including a luma mapping with chroma scaling (LMCS) type, and a slice. The mechanism further includes obtaining ALF parameters from the first APS NAL unit, obtaining scaling list parameters from the second APS NAL unit, and LMCS parameters from the third APS NAL unit. The mechanism further includes decoding the slice using the ALF parameters, the scaling list parameters, and the LMCS parameter. The mechanism further includes forwarding the slice for display as part of a decoded video sequence.