Video Coding Syntax for Sublayer Non-Reference Picture Signaling
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Solution Overview
Problem
Existing video coding standards lack efficient mechanisms for signaling sublayer non-reference information, which can lead to inefficiencies in video decoding and display processes, particularly in scenarios involving sub-bitstream extraction and selective decoding of regions of interest.
Innovation Solution
Implementing techniques for signaling sublayer non-reference picture messages and setting syntax elements to indicate whether a picture is a sublayer non-reference picture, allowing for efficient video decoding based on the picture's status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all pictures are decoded and processed, then video quality is maintained, but computational load and bandwidth usage increase
Solution Approach 1:
The patent extracts and identifies sublayer non-reference pictures from the video stream using a syntax element in the picture parameter set. These identified pictures are then excluded from the decoding and processing pipeline, allowing the system to skip unnecessary computational operations while maintaining video quality for reference pictures.
Solution Approach 2:
Instead of decoding all pictures in the video stream, the patent applies partial action by selectively decoding only the necessary reference pictures. The sublayer non-reference pictures are identified and skipped, reducing computational load while still maintaining adequate video quality through selective processing.
2Productivity
If sublayer non-reference information is signaled, then decoding efficiency is improved, but bitstream complexity increases
Solution Approach 1:
The patent introduces a syntax element parameter in the picture parameter set to indicate sublayer non-reference pictures. This parameter change allows the bitstream to convey additional information about picture types, enabling more efficient decoding decisions. The syntax element is integrated into the existing parameter set structure, minimizing the increase in bitstream complexity.
3Loss of energy
If selective decoding of pictures is implemented, then bandwidth usage is reduced, but video quality may deteriorate
Solution Approach 1:
The patent extracts and identifies sublayer non-reference pictures using a dedicated syntax element. By explicitly marking these pictures for exclusion, the system can skip transmitting and decoding them, reducing bandwidth usage. The video quality is maintained because reference pictures necessary for reconstruction are still fully processed.
Data Source
AI summary
A device may be configured to signal sublayer non-reference information for coded video according to one or more of the techniques described herein.