Scalable Video Decoding Tile Signaling Efficiency
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Solution Overview
Problem
Existing video encoding and decoding technologies face challenges in efficiently supporting diverse video quality, resolution, and frame rates across various terminals and networks, particularly in scalable video coding, where signaling tile and representation format information is inefficient, affecting encoding and decoding performance.
Innovation Solution
A method for video decoding that acquires and signals tile and representation format information efficiently, allowing for parallel encoding and decoding of layered bitstreams, improving encoding and decoding efficiency by correlating layers and optimizing picture representation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scalable video coding is implemented to support diverse video quality and resolution across various terminals and networks, then adaptability and versatility are improved, but device complexity increases due to the need for efficient signaling of tile and representation format information
Solution Approach 1:
The video picture is divided into multiple tiles, and tile information is signaled separately for different layers. This segmentation allows independent optimization of each tile's representation format while maintaining overall scalability, resolving the contradiction by enabling diverse quality support through structured division without overwhelming signaling complexity.
Solution Approach 2:
The patent introduces a layer dimension in scalable video coding, where tile information and representation formats are defined across multiple layers. This dimensional approach allows progressive refinement of video quality and resolution by adding layers, achieving adaptability without linearly increasing signaling complexity at each quality level.
2Manufacturing precision
If tile information is signaled for each layer in scalable video coding, then manufacturing precision of video quality is improved, but loss of time occurs due to increased encoding and decoding processing time
Solution Approach 1:
Tile information and representation format parameters are signaled in advance in the layer structure before actual video encoding/decoding processing. This preliminary signaling allows the decoder to prepare appropriate processing configurations, reducing real-time processing time while maintaining precise quality control through pre-defined tile structures.
Solution Approach 2:
The patent utilizes parameter changes across layers, where base layer tile information serves as reference for enhancement layers. By changing and refining parameters progressively from base to enhancement layers, the system achieves high video quality precision without proportionally increasing processing time, as many parameters are inherited rather than re-processed.
3Productivity
If chroma format information and bit-depth information are acquired and signaled efficiently, then productivity of encoding and decoding is improved, but device complexity increases due to additional information processing
Solution Approach 1:
The signaling mechanism for chroma format and bit-depth information is designed to serve multiple layers and multiple picture types simultaneously. This universal signaling approach improves productivity by avoiding redundant information transmission, while the standardized multi-functional structure prevents excessive device complexity through reuse of the same signaling framework across different scenarios.
Data Source
AI summary
Disclosed are a method and an apparatus for video decoding that support a plurality of layers. The method for video decoding includes acquiring information indicating whether tile information exists and acquiring the tile information based on the information indicating whether tile information exists.