Video Coding Reference Picture Lists with Simplified Signaling
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Solution Overview
Problem
Existing video coding technologies face challenges in efficiently managing reference picture lists, leading to inefficiencies in signaling and increased data requirements, particularly in limited bandwidth scenarios.
Innovation Solution
The method involves constructing reference picture lists with the same order and number of entries as the reference picture list structure, without using initialization or modification processes, and utilizing specific flags and lists (RefPictList[0] or RefPictList[1]) to simplify and enhance the signaling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference picture lists are constructed using initialization or modification processes, then the reference picture management can be flexible and adaptive, but the signaling complexity and data requirements increase
Solution Approach 1:
The patent extracts only the necessary reference picture list structure information from the bitstream, rather than transmitting complete initialization or modification sequences. The decoder constructs the reference picture list by taking out and using only the essential structure parameters, eliminating redundant signaling while maintaining flexibility.
Solution Approach 2:
The reference picture list structure is prepared and organized in advance according to a predetermined format, allowing the decoder to directly construct the reference picture list without performing complex initialization or modification operations during decoding. This preliminary organization reduces real-time processing complexity.
2Manufacturing precision
If more reference picture list information is signaled in the bitstream, then the coding precision and control are improved, but the bandwidth consumption and data transmission requirements increase
Solution Approach 1:
The patent applies local quality by signaling detailed reference picture list structure information only where needed in the bitstream, rather than uniformly transmitting all possible parameters. This selective signaling maintains coding precision for critical parameters while reducing overall data transmission volume.
Solution Approach 2:
Instead of transmitting complete reference picture list configurations, the patent uses compact representations and indexes that reference previously defined structures. This copying approach maintains coding precision by preserving the essential structure information while significantly reducing the amount of data that needs to be transmitted.
3Reliability
If reference picture lists are constructed with complex initialization and modification processes, then the reference picture management is thorough and complete, but the decoding time and processing overhead increase
Solution Approach 1:
The reference picture list structure is organized and validated in advance during the encoding phase, so that the decoder can directly construct the reference picture list without performing complex initialization or modification operations. This preliminary preparation ensures completeness while reducing decoding time.
Solution Approach 2:
The decoder is designed to automatically construct the reference picture list using the compact structure information from the bitstream without requiring complex external initialization or modification processes. This self-service approach maintains thoroughness while minimizing processing overhead and decoding time.
Data Source
AI summary
A method of decoding a coded video bitstream is provided. The method includes obtaining a reference picture list structure for a current slice represented in the coded video bitstream; constructing a reference picture list for the current slice based on the reference picture list structure such that a number of entries in the reference picture list and an order of the entries in the reference picture list are both the same as in the reference picture list structure, wherein the reference picture list contains a plurality of active entries and a plurality of inactive entries; and obtaining, based on at least one active entry of the reference picture list, at least one reconstructed block of the current slice.