WRP-Based Motion Prediction for Video Compression Efficiency
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Solution Overview
Problem
Existing video encoding/decoding technologies face challenges in efficiently utilizing geometric transform reference pictures and WRP Flag information for advanced motion vector prediction and merge candidate generation, leading to suboptimal compression efficiency and redundancy in high-resolution video processing.
Innovation Solution
The method involves generating candidate blocks with warped reference picture (WRP) Flag information in advanced motion vector prediction (AMVP) and merge modes, constructing candidate lists by comparing and determining priorities based on WRP Flag information, and generating new candidate blocks or zero vector candidates as needed, to enhance prediction accuracy and reduce redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If geometric transform reference pictures are not utilized, then the encoding process is simpler, but compression efficiency is reduced
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing geometric transform reference pictures before the actual encoding process. These reference pictures are generated in advance using geometric transforms on previously reconstructed pictures, and stored in a reference picture buffer. This allows the encoder to quickly retrieve and utilize these pre-computed references during encoding, improving compression efficiency without significantly increasing real-time encoding complexity.
Solution Approach 2:
The patent uses copying by creating geometric transform reference pictures that are copies of previously reconstructed pictures but transformed geometrically. These copied and transformed reference pictures are then used to predict current pictures, replacing the need for complex real-time geometric warping operations during encoding.
2Measurement precision
If WRP Flag information is not used in AMVP candidate generation, then the candidate generation process is simpler, but prediction accuracy is reduced
Solution Approach 1:
The patent applies parameter changes by introducing and utilizing WRP Flag information as an additional parameter in the AMVP candidate generation process. The WRP Flag indicates whether a reference picture is a geometric transform reference picture, and this flag information is used to modify motion vector prediction parameters. By incorporating this additional parameter, the system achieves more accurate motion prediction while the increase in complexity is minimal since it only adds a flag comparison and conditional processing step.
3Loss of substance
If WRP Flag information is not used in merge candidate generation, then the merge process is simpler, but redundancy is not reduced
Solution Approach 1:
The patent applies feedback by using WRP Flag information from previously processed blocks to guide the merge candidate generation process for current blocks. The WRP Flag indicates whether geometric transform reference pictures should be used, and this feedback information is incorporated into the merge candidate list generation. This allows the system to adaptively select the most appropriate merge candidates based on the specific characteristics of the current block and its relationship to previously processed content, thereby reducing redundancy efficiently.
Data Source
AI summary
There is provided an image encoding/decoding method and apparatus. The image encoding method of the present invention includes: generating at least one candidate block including warped reference picture (WRP) Flag information in an advanced motion vector prediction (AMVP) mode; constructing a candidate list including the at least one candidate block; and generating a prediction block of a current block based on the candidate list.