Reference Picture List Derivation for Lower-Bitrate Video Decoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video coding technologies face challenges in efficiently managing reference picture lists, leading to inefficiencies in the coding process and increased data requirements, particularly in limited bandwidth scenarios.
Innovation Solution
The method involves parsing parameter sets in a coded video bitstream to derive reference picture lists, ensuring an ordered structure that aligns with the actual reference picture order, thereby simplifying and optimizing the signaling of these lists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference picture lists are signaled with detailed structures, then decoding accuracy is improved, but data transmission volume increases
Solution Approach 1:
The patent uses a simplified reference picture list structure that copies only essential information from the full reference picture list. Instead of transmitting complete reference picture list structures, the patent transmits a compact representation that can be expanded at the decoder side, reducing transmission data while maintaining decoding accuracy.
Solution Approach 2:
The patent extracts only the critical elements needed for decoding from the complete reference picture list structure. By separating essential decoding information from optional enhancement information, the patent transmits minimal necessary data while preserving the ability to achieve accurate decoding.
2Manufacturing precision
If complex reference picture list structures are used, then coding precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the reference picture list management into separate functional components: a compact signaling structure for data transmission and a reconstruction mechanism for building the full reference picture list at the decoder. This segmentation allows simple transmission structures while maintaining complex decoding capabilities when needed.
Solution Approach 2:
The patent performs preliminary organization of reference picture list information in a standardized format during encoding, allowing the decoder to efficiently reconstruct the full structure without complex real-time processing. The reference picture list is prepared and signaled in advance in an optimized form.
Data Source
AI summary
A method of decoding a coded video bitstream is provided. The method includes parsing a parameter set represented in the coded video bitstream. The parameter set contains a set of syntax elements that include a set of reference picture list structures. The method also includes parsing a slice header of a current slice represented in the coded video bitstream. The slice header contains an index of a reference picture list structure among the set of reference picture list structures in the parameter set. The method further includes deriving, based on the set of syntax elements in the parameter set and the index of the reference picture list structure, a reference picture list of the current slice. The method also includes obtaining, based on the reference picture list, at least one reconstructed block of the current slice.