Cross-Channel Coding Decision Sharing for Video Decoding Efficiency
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images, such as UHD images, leads to a significant increase in image data volume, resulting in higher transmission and storage costs, necessitating high-efficiency image encoding/decoding technologies.
Innovation Solution
A method and apparatus for encoding and decoding that utilize selective information sharing between channels, specifically sharing coding decision information between a representative channel and a target channel, particularly in the YCbCr color space, to optimize the decoding process, including transform skip information and intra-coding decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality images are used to satisfy user demand for UHD content, then image quality and resolution are improved, but image data volume increases leading to higher transmission and storage costs
Solution Approach 1:
The patent merges coding decision information from a representative channel (luma) and applies it to additional channels (chroma), reducing redundant data transmission while maintaining decoding accuracy. This is achieved by determining transform skip status and intra-coding decisions for the representative channel and reusing these decisions for chroma channels, thereby reducing the total data volume required.
Solution Approach 2:
The patent copies coding decision information from the representative channel to additional channels. Specifically, transform skip indicators and intra-coding decisions made for the luma channel are copied and applied to chroma channels, eliminating the need to transmit separate coding decisions for each channel and reducing overall data requirements.
2Reliability
If separate coding decision information is transmitted for each channel, then decoding accuracy is maintained, but transmission cost and data volume increase
Solution Approach 1:
The patent makes coding decision information universal by determining transform skip status and intra-coding decisions for the representative channel and applying these same decisions to additional channels. This multi-functional approach allows a single set of coding decisions to serve multiple channels, reducing transmission requirements while maintaining decoding reliability.
Solution Approach 2:
The patent enables the representative channel's coding decisions to serve the additional channels automatically. The transform skip indicators and intra-coding decisions for the representative channel inherently guide the decoding process for chroma channels without requiring separate explicit signaling, allowing the system to self-optimize data transmission efficiency.
3Quantity of substance
If channel information is shared selectively, then data volume and transmission cost are reduced, but complexity in determining which channels share information increases
Solution Approach 1:
The patent applies local quality by identifying the representative channel (luma) that has the most significant impact on image quality and focusing channel sharing decisions on this channel. Transform skip and intra-coding decisions are determined locally for the representative channel and then extended to additional channels, optimizing the balance between data reduction and decision complexity.
Data Source
AI summary
Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. Coding decision information of a representative channel of a target block is shared as coding decision information of a target channel of the target block, and decoding of the target block is performed using the coding decision information of the target channel. Since the coding decision information of the representative channel is shared with an additional channel, repeated signaling of identical coding decision information may be prevented. By means of this prevention, the efficiency of encoding and decoding of the target block or the like may be improved.