Video Encoder Interlayer Prediction Flag Switching
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Solution Overview
Problem
Current video coding technologies face challenges in efficiently processing increasing amounts of digital video data, particularly in managing interlayer prediction flags in multilayer coding schemes, which can lead to increased coding parameters and processing complexity.
Innovation Solution
An encoder and decoder system that dynamically switches the encoding and decoding of a flag indicating the use of interlayer reference pictures based on the presence of a multilayer coding scheme, allowing adaptive control of interlayer prediction and reducing the amount of coded information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multilayer coding scheme is used to encode video data with interlayer prediction, then coding efficiency and image quality are improved, but the amount of coding parameters and processing complexity increase
Solution Approach 1:
The patent applies dynamics by making the encoding of the interlayer reference picture use flag conditional and adaptive. The encoder dynamically decides whether to encode this flag based on the actual usage of interlayer reference pictures in the reference picture list. This dynamic approach allows the system to switch between different encoding modes (encoding the flag or not encoding it) to optimize the balance between coding efficiency and processing complexity, rather than always encoding the flag regardless of actual need.
2Manufacturing precision
If interlayer prediction is always enabled with flag encoding, then image quality is enhanced, but the amount of coded information and processing overhead increase
Solution Approach 1:
The patent extracts and encodes only the necessary information - the interlayer reference picture use flag - only when interlayer reference pictures are actually present in the reference picture list. By taking out and encoding only this specific conditional information rather than always encoding all interlayer prediction parameters, the patent reduces the overall amount of coded information while maintaining image quality where interlayer prediction is beneficial.
3Reliability
If the interlayer reference picture use flag is always encoded, then reliability of interlayer prediction control is improved, but processing time and computational load increase
Solution Approach 1:
The patent applies local quality by applying different encoding treatments to different situations. When interlayer reference pictures are present in the reference picture list, the encoder reliably encodes the interlayer reference picture use flag to ensure proper control. When interlayer reference pictures are not present, the encoder skips flag encoding entirely. This localized, conditional approach maintains reliability where needed while reducing processing time where not needed.
Data Source
AI summary
An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry: switches whether to encode a first flag, according to whether a multilayer coding scheme is used to encode one or more pictures, the first flag indicating whether use of one or more interlayer reference pictures for interlayer prediction is allowed.