Video Coding Profile Tier Level Signaling for High Luma Rates
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Solution Overview
Problem
Current video coding standards face challenges in efficiently signaling profile and level information, which affects video decoding and compression capabilities, particularly in next-generation video coding standards like Versatile Video Coding (VVC).
Innovation Solution
The proposed techniques involve receiving and parsing profile tier level syntax to determine the appropriate decoding level, specifically using a value of 105 to indicate a maximum luma sample rate of 4812963840 samples per second, and performing video decoding accordingly, allowing for flexible and efficient video block structures, prediction techniques, and entropy coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If profile and level information is signaled using traditional methods in video coding standards, then compatibility with existing decoders is maintained, but signaling efficiency and support for next-generation video capabilities are limited
Solution Approach 1:
The patent introduces a new level syntax element with specific values (e.g., level 105 indicating maximum luma sample rate of 4812963840 samples per second) to encode advanced video capabilities. This changes the parameter representation method to support higher resolution and frame rate video while maintaining backward compatibility through selective parsing based on the syntax element value.
2Reliability
If a compliant bitstream format is used to ensure decoder compatibility, then reliable video decoding is achieved, but flexibility in supporting diverse video compression capabilities is reduced
Solution Approach 1:
The patent implements dynamic syntax element parsing where the decoder selectively processes profile_tier_level syntax based on the value of level syntax elements. When advanced level values are detected (e.g., level 105), the decoder activates corresponding advanced decoding capabilities. This dynamic approach allows the same bitstream format to reliably support both traditional and next-generation video capabilities.
3Loss of information
If detailed profile and level information is always signaled, then complete video capability information is provided, but bitstream complexity and processing overhead increase
Solution Approach 1:
The patent extracts only the necessary profile_tier_level syntax elements based on the detected level value. Instead of always processing complete profile information, the decoder extracts and processes only the relevant capability information needed for the specific video stream, reducing processing complexity while maintaining complete capability awareness when needed.
Data Source
AI summary
A method of decoding video data comprises: receiving profile tier level syntax; parsing a syntax element, from the profile tier level syntax, indicating a level to which an output layer set conforms, wherein a value of 105 indicates a level where a maximum luma sample rate of 4812963840 samples per second is supported; and performing video decoding based on the indicated level.