Video Prediction Mode Signaling with Skip-Merge CBF Selection
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Solution Overview
Problem
Existing video signal processing methods lack efficiency in coding, particularly in handling skip, merge, and transform-related parameters, leading to suboptimal compression and decoding performance.
Innovation Solution
A method and device that manage skip, merge, and CBF parameters in video signal processing by determining their inclusion in the bitstream based on specific mode values, optimizing the bitstream generation and decoding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all parameters (skip, merge, CBF) are always transmitted in the bitstream, then decoding reliability is improved, but bitstream volume increases and coding efficiency deteriorates
Solution Approach 1:
The patent extracts only the necessary parameters from the complete set of video coding parameters. By determining whether to transmit CBF parameter based on the merge parameter value, the system extracts and transmits only the essential information needed for accurate decoding, eliminating redundant data transmission while maintaining decoding reliability.
Solution Approach 2:
The patent implements dynamic parameter transmission where the inclusion of CBF parameter in the bitstream is not fixed but varies according to the merge mode indication. This dynamic approach allows the system to adapt the bitstream content to the actual coding needs, transmitting parameters only when necessary, thereby reducing overall bitstream volume while ensuring reliability when parameters are present.
2Measurement precision
If CBF parameter is always obtained from bitstream, then transform information accuracy is improved, but decoding complexity and processing time increase
Solution Approach 1:
The patent performs preliminary determination of whether the CBF parameter needs to be transmitted by checking the merge parameter value before actual parameter transmission. This preliminary action allows the decoder to prepare appropriately - knowing in advance whether to expect and process the CBF parameter, thereby avoiding unnecessary processing steps and reducing decoding time while maintaining accuracy when the parameter is present.
3Manufacturing precision
If skip mode is not applied and merge mode is used, then prediction accuracy is improved, but bitstream complexity increases due to additional parameters
Solution Approach 1:
The patent applies local quality by making the CBF parameter transmission decision specific to the current block's merge mode status rather than applying a uniform rule to all blocks. This localized approach ensures that additional parameters are transmitted only where needed (when merge mode is used and CBF information is relevant), maintaining prediction accuracy where required while avoiding unnecessary complexity in other blocks.
Data Source
AI summary
A video signal processing method comprises: obtaining, from a bitstream, a skip parameter (cu_skip_flag) indicating whether a skip mode is applied to a current block; when the skip parameter indicates that a mode is not the skip mode, obtaining, from the bitstream, a merge parameter (merge_flag) indicating whether the current block is coded with a merge mode; and determining whether a coded block flag (CBF) parameter (cu_cbf), which indicates whether a syntax element related to transform is obtained from the bitstream, is obtained, according to a value of the merge parameter, wherein, when the value of the merge parameter indicates the merge mode, the CBF parameter is not obtained from the bitstream and is determined to be a preconfigured value.