Video Chroma Transform Block Limits for Encoding and Decoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to a significant increase in transmission and storage costs due to the increased amount of transmitted information, necessitating high-efficient image compression technology.
Innovation Solution
An image encoding/decoding method and apparatus that limits the maximum size of a chroma transform block, determining the transform block size based on the color component, and includes a transmission method for the generated bitstream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the maximum size of chroma transform block is limited, then encoding/decoding efficiency is improved, but compression ratio may be reduced
Solution Approach 1:
The patent applies different transform block size limitations to different color components (chroma vs. luma). Specifically, chroma transform blocks are limited to smaller sizes (e.g., 4x4 or 8x8) while luma transform blocks can use larger sizes, allowing the system to optimize for chroma compression efficiency without sacrificing overall image quality and compression performance
2Measurement precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but transmission cost increases
Solution Approach 1:
The patent segments the image into different color components (chroma and luma) and applies different compression strategies to each. By limiting chroma transform block sizes and applying selective quantization, the system reduces the total bit rate required for transmission while maintaining acceptable image quality, thus reducing transmission costs
Data Source
AI summary
An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a prediction mode of a current block, generating a prediction block of the current block based on inter prediction mode information, based on the prediction mode of the current block being an inter prediction mode, generating a residual block of the current block based on a transform block of the current block, and reconstructing the current block based on the prediction block and the residual block of the current block.