Image Decoding with Unified BDPCM Flags for Chroma and Luma

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The increasing demand for high-resolution and high-quality images leads to higher transmission and storage costs due to the increased amount of information, necessitating a more efficient image compression technique.

Innovation Solution

Implementing Block-based Delta Pulse Code Modulation (BDPCM) enabled flags for luma and chroma blocks in image decoding, allowing for reduced bit amounts and improved coding efficiency by determining BDPCM enablement through a single syntax element, independent of chroma format.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate BDPCM enabled flags are used for luma and chroma blocks, then BDPCM can be independently controlled for each block type, but the syntax complexity and bit amount increase

Engineering Contradiction:

ImproveBDPCM control flexibilityVSAvoidsyntax complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the separate BDPCM enabled flags for luma and chroma blocks into a single unified syntax element. This allows the decoding apparatus to determine BDPCM enablement for both block types using one flag, reducing syntax complexity and bit amount while maintaining the capability to control BDPCM for different block types through the unified syntax

Inventive Principle:

Principle #5Merging (Combining)

2Productivity

If BDPCM is enabled for both luma and chroma blocks with separate flags, then coding efficiency can be optimized for each block type, but the bit amount for syntax elements increases

Engineering Contradiction:

Improvecoding efficiencyVSAvoidbit amount

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent combines multiple syntax elements (separate BDPCM enabled flags for luma and chroma) into a single unified syntax element. This merging reduces the total bit amount required to signal BDPCM enablement while preserving the ability to optimize coding efficiency for different block types through the unified control mechanism

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If chroma format-specific BDPCM flag handling is implemented, then precise control for different chroma formats is achieved, but device complexity increases

Engineering Contradiction:

Improvechroma format adaptabilityVSAvoidprocessing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal BDPCM enabled flag that functions across all chroma formats (4:4:4, 4:2:2, 4:2:0, etc.). This single syntax element provides chroma format adaptability without requiring separate flag handling logic for each format, thereby reducing processing complexity while maintaining versatility across different chroma subsampling configurations

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250392740A1Image decoding method and device for same

Publication Date: 2025.12.25 LG ELECTRONICS INC

AI summary

An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring image information including a Block-based Delta Pulse Code Modulation (BDPCM) available flag; and generating a reconstructed picture on the basis of the image information, wherein the BDPCM available flag relates to whether BDPCM is available for chroma and luma blocks.