Scalable Video Inter-Layer Prediction Using Up-Sampled Reference Pictures
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality video data, such as HD and UHD, poses challenges in terms of high data volume, leading to increased transmission and storage costs, and existing video compression techniques are inadequate for efficiently handling scalable video signals, particularly in inter-layer prediction and up-sampling processes.
Innovation Solution
A method and device for determining a corresponding reference picture layer for inter-layer prediction in scalable video signal encoding/decoding, involving inter-layer reference information, up-sampling of the reference picture, and constructing a reference picture list that includes both temporal and inter-layer reference pictures for effective inter-prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-quality video data is transmitted or stored, then video quality is improved, but transmission costs and storage costs increase
Solution Approach 1:
The video signal is divided into multiple layers with different resolutions and quality levels. The scalable video coding structure segments the video data into base layer and enhancement layers, allowing selective transmission and storage of different quality levels to reduce overall data volume while maintaining high quality when needed
Solution Approach 2:
The patent changes the resolution and quality parameters of video data across different layers. By using inter-layer prediction and up-sampling techniques, the system can reconstruct high-resolution video from lower-resolution reference layers, effectively reducing the amount of data that needs to be transmitted and stored while maintaining the ability to produce high-quality output
2Quantity of substance
If existing video compression techniques are used, then data volume is reduced, but efficiency in handling scalable video signals is insufficient
Solution Approach 1:
The patent performs preliminary up-sampling of reference layer pictures to match the resolution of current layer pictures before inter-layer prediction. This preliminary action prepares the reference data in advance, enabling more efficient compression by allowing direct pixel-level comparison and prediction across layers, thereby improving overall compression efficiency for scalable video signals
3Speed
If inter-layer prediction is performed without proper up-sampling, then processing speed is improved, but prediction accuracy deteriorates
Solution Approach 1:
The reference layer picture is up-sampled to the current layer resolution in advance before inter-layer prediction is performed. This preliminary up-sampling ensures that the reference data matches the spatial dimensions of the current layer, enabling accurate pixel-level prediction while maintaining efficient processing by avoiding repeated resampling operations during prediction
Data Source
AI summary
A scalable video signal decoding method according to the present invention comprises determining a corresponding picture of a reference layer used for inter-layer prediction of a current picture using interlayer reference information on the current picture of a current layer, generating an interlayer reference picture by up-sampling the determined corresponding picture, generating a reference picture list including a temporal reference picture and the interlayer reference picture, and performing an inter prediction of the current picture on the basis of the reference picture list.