Point Cloud Decoding Device Planar Mode Flag Handling
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Solution Overview
Problem
Existing point cloud decoding technologies require unnecessary decoding of syntax flags, leading to increased bit rate and processing overhead, even when the planar mode is not used.
Innovation Solution
A point cloud decoding device and method that decodes a first flag indicating the use of a planar mode from a bit stream, and recognizes the absence of this flag as equivalent to not using the planar mode, thereby avoiding unnecessary decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flag is always decoded to control nearest neighbor node search in planar mode, then the decoding process is complete and unambiguous, but the bit rate increases and processing overhead increases when planar mode is not used
Solution Approach 1:
The patent extracts the flag decoding operation from the mandatory decoding sequence and makes it conditional. The flag is only decoded when planar mode is actually used, removing unnecessary decoding operations when planar mode is not applicable, thereby reducing bit rate overhead while maintaining decoding reliability when needed
Solution Approach 2:
The patent introduces dynamic behavior to the decoding process by making the flag decoding conditional rather than static and mandatory. The decoding structure adapts based on whether planar mode is used, allowing the system to optimize between complete decoding and bit rate efficiency depending on the actual mode requirements
2Device complexity
If a flag is always decoded to control nearest neighbor node search in planar mode, then the decoding logic is simple and uniform, but the processing overhead increases when planar mode is not used
Solution Approach 1:
The patent segments the decoding logic into distinct conditional branches: one path for when planar mode is used (requiring flag decoding) and another path for when it is not used (skipping flag decoding). This segmentation allows the system to maintain simple uniform logic within each branch while avoiding unnecessary processing overhead by only executing relevant decoding operations
Data Source
AI summary
A point cloud decoding device 200 according to the present invention includes: a geometry information decoding unit 2010 that decodes a first flag used to indicate whether or not to use a planar mode from a bit stream and recognizes the first flag as having an identical value to a case of failing to use the planar mode in a case of non-inclusion of the first flag in the bit stream.