Joint Intra Prediction and Transform Inheritance for Video Decoding
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Solution Overview
Problem
Existing video coding systems face challenges in efficiently combining intra prediction and transform parameters, leading to suboptimal compression and decoding performance.
Innovation Solution
Implementing a joint inheritance mechanism for intra prediction and transform parameters, including a merge mode that allows for the selection of inverse transform types based on merge candidates, enhancing the decoding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate inheritance mechanisms are used for intra prediction parameters and transform parameters, then the decoding process is simpler, but compression efficiency and decoding performance are suboptimal
Solution Approach 1:
The patent merges the inheritance mechanisms for intra prediction parameters and transform parameters into a unified joint inheritance mechanism. The merge candidate list includes both intra prediction mode information and transform parameter information, allowing the decoder to inherit both types of parameters from a single selected candidate, thereby improving compression efficiency while maintaining decoding performance
2Reliability
If joint inheritance of intra prediction and transform parameters is implemented, then compression and decoding performance improve, but the device complexity increases
Solution Approach 1:
The patent creates a universal merge candidate list that serves multiple functions: it provides both intra prediction mode selection and transform parameter selection. The same merge candidate index is used to retrieve both prediction parameters and transform parameters, reducing the need for separate processing mechanisms and minimizing the increase in device complexity
3Measurement precision
If transform information is obtained from selected merge candidates, then the inverse transform type determination becomes more accurate, but the decoding process becomes more complex
Solution Approach 1:
The patent performs preliminary actions by pre-organizing transform parameter information within the merge candidate structures before decoding. The transform parameters are prepared and associated with merge candidates in advance, allowing the decoder to directly retrieve and use this information without requiring complex real-time processing, thus improving determination accuracy while limiting complexity increase
Data Source
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AI summary
Systems, methods, and instrumentalities are disclosed for performing joint inheritance of intra prediction and transform parameters. A video decoding device may determine whether a merge mode associated with an intra-type prediction mode is enabled for a video block in a picture. If a merge mode is associated with an intra-type prediction mode for the video block, the video decoding device may generate a merge candidate list associated with the merge mode. The video decoding device may determine, based on obtained transform information associated with a selected candidate of the merge candidate list, an inverse transform type for a prediction of the video block. The video decoding device may predict the video block and decode the video block based on the inverse transform type. The video decoding device may decode the picture based on the video block.