Point Cloud Bitstream Syntax for Clear Frame Identification
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Solution Overview
Problem
Conventional point cloud coding techniques lack efficient frame identification mechanisms, leading to inefficiencies in processing and compression, particularly in the Geometry-based Point Cloud Compression (G-PCC) standard, where frame identification elements can be absent or unclear, hindering effective data processing.
Innovation Solution
Implementing a method for point cloud coding that specifies the length in bits of syntax elements for frame identification, ensuring they are greater than or equal to the number of bits in a frame counter, thereby clearly defining frame boundaries and improving processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional point cloud coding techniques are used without explicit syntax element length specifications, then the coding standard can be simpler to implement, but frame identification becomes ambiguous and processing efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by explicitly defining the length in bits of syntax elements (frame identification elements) in the G-PCC coding standard. This parameter specification resolves the ambiguity in frame identification while maintaining a relatively simple syntax structure, thereby improving processing efficiency without significantly increasing implementation complexity.
2Reliability
If frame identification elements are made explicit with defined bit lengths, then frame boundary detection becomes more reliable, but the bitstream structure becomes more complex
Solution Approach 1:
The patent specifies the length in bits for frame identification syntax elements, which enhances the reliability of frame boundary detection. This parameter definition provides clear guidance for parsers while maintaining a structured and manageable bitstream format, avoiding excessive complexity.
3Productivity
If syntax elements have fixed and explicit bit lengths, then decoding becomes more efficient and less ambiguous, but encoding flexibility is reduced
Solution Approach 1:
The patent defines fixed bit lengths for frame identification syntax elements, which significantly improves decoding efficiency by eliminating ambiguity in frame boundary detection. While this reduces some encoding flexibility, the fixed parameters provide a solid foundation that maintains adaptability through other coding mechanisms in the standard.
Data Source
AI summary
Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding is proposed. The method comprises: performing a conversion between a point cloud sequence and a bitstream of the point cloud sequence based on a set of syntax elements comprising at least one of the following: a first syntax element identifying a first point cloud frame, a frame-specific attribute property being applied to the first point cloud frame, and the set of bits are indicated in the bitstream, or a second syntax element identifying a second point cloud frame, a frame boundary marker being applied to the second point cloud frame, wherein the length in bits of the second syntax element is greater than or equal to the number of bits in the set of bits.