Multi-layer Video Reference Picture List Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution and high-quality video data requires efficient compression techniques to reduce transmission and storage costs, but existing methods do not effectively utilize inter-layer prediction for scalable coding in multi-layer video structures.
Innovation Solution
A method for generating a reference picture list using flag information that indicates the usage of a reference picture set from a reference layer, allowing for the derivation of short-term, long-term, and inter-layer reference picture sets, and their positions in the initial reference picture list, enabling efficient prediction in multi-layer video decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-quality video data is transmitted or stored using existing methods, then video quality is maintained, but transmission costs and storage costs increase
Solution Approach 1:
The video data is divided into multiple layers including base layer and enhancement layers, where each layer represents different quality levels. The base layer contains essential video information for basic quality, while enhancement layers contain additional details for higher quality. This segmentation allows selective transmission and storage of layers based on available bandwidth and storage capacity, reducing overall data amount while maintaining quality where needed.
Solution Approach 2:
The multi-layer video structure implements a nested organization where enhancement layers are built upon the base layer. The base layer provides the foundation, and enhancement layers are nested within the overall structure to add progressive quality improvements. This nested arrangement enables efficient compression by allowing lower layers to support higher layers, reducing redundant data transmission and storage requirements.
2Quantity of substance
If existing video compression techniques are used, then data transmission and storage costs are reduced, but inter-layer prediction is not effectively utilized in multi-layer video structures
Solution Approach 1:
The patent establishes reference picture lists in advance that include pictures from multiple layers (base layer and enhancement layers). By pre-configuring these reference lists with cross-layer reference pictures, the encoding process can directly utilize inter-layer prediction without requiring complex real-time decisions. This preliminary setup of reference structures enables efficient exploitation of temporal and inter-layer correlations, improving encoding productivity while maintaining compressed data sizes.
Data Source
AI summary
An image decoding method supporting a plurality of layers according to the present invention may comprise the steps of: when an initial reference picture list of a current picture is configured, receiving flag information indicating whether reference picture set information of a reference layer to which the current picture refers is used; generating the initial reference picture list on the basis of the flag information; and predicting the current picture on the basis of the initial reference picture list. Accordingly, the present invention provides a method for generating a reference picture list including a picture of a layer, which is different from a layer to be currently encoded and decoded, and an apparatus using the same.