Video signal processing method and device using subblock-based motion compensation
The method improves video signal processing efficiency by employing sub-block-based merge modes and motion vector differentials for inter prediction, reducing signaling overhead and enhancing compression efficiency.
JP2025114757AActive Publication Date: 2025-08-05WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC
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Patent Information
- Application Number
- JP2025078932
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2019-02-13
- Filing Date
- 2025-05-09
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2039-10-23
AI Technical Summary
Technical Problem
Existing video signal processing methods lack efficiency in compression coding, particularly in handling spatial and temporal correlations, necessitating improved methods for sub-block-based motion compensation.
Method used
A video signal processing method that involves obtaining syntax elements to determine the application of sub-block-based merge modes and motion vector differentials for inter prediction, allowing for the derivation of motion vectors and generation of prediction blocks.
Benefits of technology
This approach enhances coding efficiency by reducing signaling overhead and improving compression efficiency through optimized syntax parsing.
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Abstract
To provide a video signal processing method and device for encoding and decoding a video signal, capable of enhancing a compression efficiency.SOLUTION: In the case where a first syntax element indicating whether or not a subblock-based merging mode is adopted to the current block indicates that the subblock-based merging mode is not adopted to the current block, a method acquires a second syntax element indicating whether or not a merging mode using a motion vector difference is adopted to a current block. In the case where the second syntax element indicates that the merging mode using the motion vector difference to the current block is adopted, the method: derives a motion vector for the current block by adding the motion vector difference to a candidate motion vector indicated by a third syntax element that indicates a candidate to be used in inter-prediction for the current block, among candidates contained in a merge candidate list for the current block; and generates a prediction block of the current block.SELECTED DRAWING: Figure 33
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