Candidate Motion List Filling Using Historical Motion Information
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Solution Overview
Problem
In video compression processes like Versatile Video Coding (VVC) and Audio Video coding Standard 3 (AVS3), the motion information list often lacks sufficient displacement vectors, leading to ineffective predicted displacement vectors and reduced video compression performance, which adversely affects user experience.
Innovation Solution
A method and apparatus for determining a candidate motion information list by utilizing a historical motion information table and spatial domain motion information list to fill in missing displacement vectors, enhancing the prediction effect and improving video compression performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motion information list is constructed using conventional methods, then the construction process is simple, but the list lacks sufficient displacement vectors leading to poor prediction effect
Solution Approach 1:
The patent applies preliminary action by pre-construction of a historical motion information table during the video encoding process. This table stores motion information from previously encoded blocks, which is then retrieved and used to supplement the current block's motion information list when insufficient displacement vectors are available. This advance preparation ensures that sufficient motion information is available without complicating the real-time construction process.
Solution Approach 2:
The patent introduces a historical motion information table as an intermediary between the conventional motion information construction method and the final candidate list. This intermediary structure stores and manages motion information from multiple sources (spatial neighbors, temporal references, and historical data), allowing the system to select and combine the most appropriate displacement vectors without directly modifying the base construction method.
2Productivity
If the motion information list does not have sufficient displacement vectors, then the construction process is fast, but video compression performance deteriorates
Solution Approach 1:
The historical motion information table is pre-filled during the encoding process with motion data from previously processed blocks. When constructing the motion information list for the current block, the system quickly checks this pre-prepared table for suitable displacement vectors, avoiding time-consuming searches and ensuring sufficient candidates are available for high-quality compression.
Solution Approach 2:
The system implements feedback by continuously updating the historical motion information table with motion data from newly encoded blocks. This creates a self-improving mechanism where the table accumulates relevant motion patterns over time, enhancing the availability of suitable displacement vectors and improving compression performance progressively throughout the video encoding process.
Data Source
AI summary
This application provides a method for determining a candidate motion information list for a current codec block, including: determining a target motion information list and a historical motion information table for the current codec block; and obtaining, when the target motion information list is not full, at least one piece of motion information based on the historical motion information table, and filling the candidate motion information list based on the at least one piece of motion information, the candidate motion information list being used for providing candidate predicted displacement vectors for the current codec block. This application further provides an apparatus for determining a candidate motion information list, an electronic device, a storage medium, and a computer program product.