Intra Inter Frame Joint Prediction for Video Coding
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Solution Overview
Problem
Existing video coding technologies face inefficiencies in intra frame and inter frame joint prediction, which affects the accuracy of prediction and compression efficiency.
Innovation Solution
A method and codec device for intra frame and inter frame joint prediction, where the joint prediction mode is determined based on the intra frame prediction mode of encoded blocks, content characteristics of the current coding block, or specified prediction modes, and prediction values are obtained using candidate motion vectors and joint intra frame prediction values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If intra frame prediction and inter frame prediction are performed separately, then the prediction process is simple, but the prediction accuracy is insufficient
Solution Approach 1:
The patent merges intra frame prediction and inter frame prediction into a unified joint prediction framework. The joint prediction mode determination unit integrates both prediction types, allowing the encoder to select from combined intra and inter prediction modes based on rate-distortion optimization, thereby improving prediction accuracy while managing complexity through systematic integration
2Productivity
If traditional intra frame prediction is used, then the spatial redundancy is removed, but the temporal redundancy removal efficiency is limited
Solution Approach 1:
The joint prediction mode determination unit provides multi-functionality by handling both intra frame prediction (spatial redundancy removal) and inter frame prediction (temporal redundancy removal) within a single unified framework. This allows the system to adaptively select the most appropriate prediction mode for each coding block, simultaneously addressing both spatial and temporal redundancy removal needs
3Measurement precision
If more prediction modes are considered in joint prediction, then the prediction accuracy improves, but the computational complexity increases
Solution Approach 1:
The patent applies partial action by considering a subset of prediction modes that are most relevant for each coding block type. The joint prediction mode determination unit evaluates both intra and inter prediction modes but selects only the optimal combination needed for each specific block, avoiding unnecessary computation of all possible modes while maintaining high prediction accuracy
Data Source
AI summary
An intra frame and inter frame joint prediction method is provided. The method includes determining at least one joint intra frame prediction mode of current coding block based on intra frame prediction mode of at least one encoded block of current frame, or determining the at least one joint intra frame prediction mode of the current coding block based on content characteristics of the current coding block, or taking at least one first specified intra frame prediction mode as the at least one joint intra frame prediction mode of current coding block; obtaining a joint intra frame prediction value of the current coding block based on the at least one joint intra frame prediction mode; and obtaining at least one intra frame and inter frame joint prediction value based on at least one candidate motion vector and the joint intra frame prediction value of the current coding block.