Inter-layer Prediction Using Temporal Sub-layer Information
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Solution Overview
Problem
Existing video encoding and decoding technologies face challenges in efficiently supporting scalability and quality across diverse terminals and networks, particularly in handling high-definition and ultra-high-definition image compression and processing, due to varying terminal capabilities and network conditions.
Innovation Solution
An inter-layer prediction method using temporal sub-layer information is introduced, where the same maximum temporal sub-layer information is applied to all layers, reducing signaling overhead by omitting separate transmission of relation information and utilizing an indicator to control inter-layer prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate maximum temporal sub-layer information is transmitted for each layer, then inter-layer prediction accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the maximum temporal sub-layer information into a single common value that is applied across all layers. Instead of transmitting separate maximum temporal sub-layer information for each layer, the system determines one maximum temporal sub-layer value that is valid for all layers, thereby reducing signaling overhead while maintaining prediction functionality.
Solution Approach 2:
The patent makes the maximum temporal sub-layer information universal across all layers by applying the same value to every layer. This single piece of information serves multiple layers simultaneously, eliminating the need for layer-specific parameters and reducing overall signaling requirements.
2Measurement precision
If detailed temporal sub-layer information is signaled for each layer, then prediction control precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the maximum temporal sub-layer information from the layer-specific context and places it in a common, universal context. By taking out the layer-specific maximum temporal sub-layer parameters and replacing them with a single common parameter, the system reduces signaling structure complexity while retaining essential prediction control.
3Adaptability or versatility
If layer-specific maximum temporal sub-layer information is transmitted, then adaptability to different layer requirements is improved, but information transmission efficiency deteriorates
Solution Approach 1:
The patent changes the parameter structure from multiple layer-specific maximum temporal sub-layer values to a single common maximum temporal sub-layer value. This parameter change simplifies the information transmission while maintaining the ability to control inter-layer prediction across all layers uniformly.
Data Source
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AI summary
The present invention relates to a method for predicting an inter-layer of an image having a plurality of layers including at least one temporal sub-layer. The method according to present invention comprises the steps of: acquiring information on a temporal sub-layer for inter-layer prediction; inducing a reference picture used for predicting an inter-layer of a current picture on the basis of the information on the temporal sub-layer; and predicting the inter-layer of the current picture on the basis of the reference picture.