Video Block Motion Shift for Accurate Temporal Motion Prediction
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Solution Overview
Problem
Existing video coding technologies face challenges in improving coding efficiency and effectiveness, particularly in the determination of temporal motion information.
Innovation Solution
The method involves determining a motion shift (MS) of a current video block based on bitstream indications, using a vector associated with the prediction location, and utilizing this information to enhance temporal motion prediction, thereby improving coding efficiency and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional video coding techniques are used, then video compression is achieved, but coding efficiency and effectiveness are insufficient
Solution Approach 1:
The patent changes the parameter of motion information representation by introducing motion shift (MS) vectors that indicate offsets from collocated block positions. This allows the decoder to accurately locate temporal motion information without transmitting complete motion vectors, thereby improving coding efficiency while maintaining effectiveness. The MS parameters are derived from bitstream indications and used to adjust the position where temporal motion information is fetched from reference frames.
2Measurement precision
If temporal motion information is determined without motion shift, then processing is simpler, but prediction accuracy deteriorates
Solution Approach 1:
The patent introduces motion shift (MS) vectors as an intermediary element between the collocated block position and the actual temporal motion information location. The MS acts as a mediator that refines the position indication without requiring complete motion vector transmission. This intermediary approach improves prediction accuracy by enabling precise location determination while keeping processing complexity manageable through bitstream-based indication rather than full vector encoding.
3Measurement precision
If motion vectors are transmitted explicitly, then prediction accuracy is improved, but bitstream size increases
Solution Approach 1:
The patent extracts only the essential motion shift information from complete motion vectors and transmits this extracted component in the bitstream. Instead of transmitting full motion vectors, the system extracts and transmits only the MS parameters that indicate position offsets. This extraction approach maintains motion prediction accuracy by preserving the critical positional information while significantly reducing bitstream data volume by eliminating redundant motion vector components.
Data Source
AI summary
Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. In the method, for a conversion between a current video block of a video and a bitstream of the video, a motion shift (MS) of the current video block is determined based on at least one indication in the bitstream. The MS comprises a vector associated with a location of a prediction of the current video block. Temporal motion information of the current video block is determined based on the MS. The conversion is performed based on the temporal motion information.