Image Coding Buffer Descriptions to Reduce Reference List Redundancy
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Solution Overview
Problem
Existing image coding and decoding methods face challenges in improving coding efficiency, particularly due to redundant information in buffer and reference list descriptions.
Innovation Solution
The proposed method involves writing buffer description defining information and reference list description defining information into a sequence parameter set, allowing for the selection of buffer descriptions for each processing unit and updating these descriptions as needed, thereby reducing redundant information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If buffer description defining information and reference list description defining information are written into a sequence parameter set for each picture, then coding flexibility is improved, but coding efficiency deteriorates due to redundant information
Solution Approach 1:
The patent segments the buffer description and reference list description into two parts: (1) definition information written once in the sequence parameter set, and (2) selection information written in the picture header or slice header. This segmentation eliminates redundant transmission of full descriptions while maintaining the ability to select different buffer descriptions for different pictures or slices, thus resolving the contradiction between coding flexibility and coding efficiency.
2Adaptability or versatility
If multiple buffer descriptions are defined to accommodate different picture types and reference needs, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple buffer descriptions with different configurations in the sequence parameter set before picture coding begins. Each buffer description is prepared in advance with specific reference picture lists and parameters, allowing the encoder and decoder to simply select the appropriate pre-defined buffer description for each picture type without complex runtime calculations, thus reducing device complexity while maintaining adaptability.
Data Source
AI summary
An image coding method includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions; writing, into the sequence parameter set, reference list description defining information for defining a plurality of reference list descriptions corresponding to the buffer descriptions; and writing, into a first header of each processing unit which is included in a coded bitstream, buffer description selecting information for specifying a selected buffer description.