Image Decoding With Conditional TSRC Sign Data Hiding
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 large amount of information required, necessitating a more efficient image compression technique.
Innovation Solution
The method and apparatus improve image coding efficiency by signaling the Transform Skip Residual Coding (TSRC) enabled flag based on the sign data hiding enabled flag, thereby preventing sign data hiding for transform skip blocks where TSRC is not enabled, reducing the bit amount coded and enhancing overall residual coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sign data hiding is applied to transform skip blocks, then residual coding efficiency is improved, but the bit amount increases due to additional flag signaling
Solution Approach 1:
The patent applies sign data hiding selectively only to transform skip blocks where TSRC is enabled, rather than universally to all blocks. This localized application avoids unnecessary bit consumption in blocks where sign data hiding would not provide benefit, while still achieving improved residual coding efficiency where it is most effective.
Solution Approach 2:
The patent introduces dynamic flag signaling where the TSRC enabled flag is conditionally signaled based on the sign data hiding enabled flag. This dynamic approach allows the coding system to adaptively adjust the level of compression techniques applied, optimizing the balance between coding efficiency and bit consumption for different block types and content characteristics.
2Manufacturing precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but transmission and storage costs increase due to larger data volume
Solution Approach 1:
The patent changes the coding parameters by introducing conditional flag signaling based on the relationship between sign data hiding enabled flag and TSRC enabled flag. This parameter optimization allows for more efficient representation of residual data in high-resolution images, reducing the overall bit consumption while maintaining high image quality through selective application of compression techniques.
Data Source
AI summary
An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a sign data hiding availability flag indicating whether or not sign data hiding is available for a current slice; obtaining a TSRC availability flag indicating whether or not TSRC is available for a transform skip block of the current slice; obtaining residual coding information about the transform skip block on the basis of the TSRC availability flag; deriving a residual sample for the transform skip block on the basis of the residual coding information; and generating a reconstruction picture on the basis of the residual sample, wherein the TSRC availability flag is obtained on the basis of the sign data hiding availability flag.