Multilayer Video Inter-Layer Prediction Reference Layer Selection
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Solution Overview
Problem
Conventional scalable video coding and multiview video coding methods face inefficiencies in encoding and decoding rates due to limited encoding methods based on macroblocks of predetermined sizes, which hinder adaptive performance across various communication networks and terminals.
Innovation Solution
The method involves obtaining inter-layer prediction allowance information and single layer use information from a bitstream to determine the reference layer for inter-layer prediction, allowing for efficient encoding and decoding by using a picture from the reference layer, which can be the layer with the maximum layer identifier value, thereby improving encoding/decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional scalable video coding or multiview video coding encodes video according to a limited encoding method based on a macroblock of a predetermined size, then the encoding structure is simple and standardized, but the encoding/decoding rate is insufficient and adaptability to various communication networks and terminals is limited
Solution Approach 1:
The patent introduces dynamic reference layer selection mechanisms where the reference layer can be flexibly determined based on single layer use information and inter-layer prediction allowance information. This allows the encoding system to adapt dynamically to different network conditions and terminal capabilities, resolving the contradiction between adaptability and encoding efficiency by enabling runtime adjustments without changing the fundamental macroblock-based structure
Solution Approach 2:
The patent changes the parameter of reference layer selection by introducing new syntax elements (inter-layer prediction allowance information and single layer use information) that control which layer serves as the reference layer. This parameter change enables the system to optimize encoding/decoding rates for different scenarios while maintaining the conventional macroblock encoding framework, thus improving adaptability without sacrificing encoding rate
2Productivity
If inter-layer prediction is performed without determining a specific reference layer, then multiple layers can potentially be used for prediction, but the decoding complexity increases and encoding/decoding performance is not optimized
Solution Approach 1:
The patent extracts and isolates the reference layer determination logic by introducing specific syntax elements (single layer use information) that explicitly identify which layer should be used as the reference layer. This extraction simplifies the decoding process by providing clear guidance on reference layer selection, reducing decoding complexity while maintaining optimized encoding/decoding performance through targeted inter-layer prediction
Data Source
AI summary
Multilayer video encoding/decoding methods and apparatuses are provided. A multilayer video decoding method includes: obtaining inter-layer prediction allowance information from a bitstream; obtaining single layer use information from the bitstream when the inter-layer prediction allowance information indicates that inter-layer prediction is usable; determining at most only one layer among at least one layer, to which a current picture refers, as a reference layer when the single layer use information indicates that at most one picture is used for inter-layer prediction; and performing inter-layer prediction on the current picture by using a picture belonging to the reference layer.