3D Data Encoding Access Unit for Multiplexing Efficiency
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Solution Overview
Problem
Current methods for encoding and decoding three-dimensional data, such as point cloud data, are inefficient in terms of processing amount, lacking a systematic approach for multiplexing and transmission, especially when involving multiple codecs like Point Cloud Compression (PCC).
Innovation Solution
A method and device for encoding and decoding three-dimensional data that involves encoding geometry and attribute information together in an access unit, allowing for simplified reference control and reduced processing, using bitstreams with parameter sets and sequence sets for common control information across multiple time points, and defining common NAL unit formats for PCC codecs to facilitate multiplexing and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If three-dimensional data (geometry and attribute information) is encoded separately without a systematic approach, then encoding flexibility is maintained, but processing amount increases and efficiency decreases
Solution Approach 1:
The patent combines geometry information and attribute information into a unified access unit structure, allowing them to be encoded and processed together rather than separately. This merging reduces the overall processing amount while maintaining encoding flexibility, directly resolving the contradiction between encoding efficiency and processing complexity
Solution Approach 2:
The access unit structure serves multiple functions simultaneously: it organizes geometry and attribute information, enables efficient reference control, supports multiplexing and transmission, and facilitates decoding. This multi-functionality improves productivity without proportionally increasing device complexity
2Productivity
If multiple codecs are used for three-dimensional data compression, then coding efficiency improves, but system complexity and difficulty of multiplexing increase
Solution Approach 1:
The access unit structure provides a universal framework that can accommodate multiple different codecs (such as PCC and other point cloud compression methods) within a single systematic approach. This universality allows efficient use of multiple codecs while reducing system complexity through standardized organization and reference control mechanisms
Solution Approach 2:
The access unit acts as an intermediary structure that mediates between different codecs and the final decoded output. It provides a common interface and organization method that simplifies the integration of multiple codecs, reducing the complexity of multiplexing and transmission while maintaining high coding efficiency
Data Source
AI summary
A three-dimensional data encodes method of encoding three-dimensional data items in time series. Each of the three-dimensional data items includes a geometry information item and an attribute information item in association with a same time point. The three-dimensional data encoding method includes: first encoding of encoding the geometry information item; and second encoding of encoding the attribute information item with reference to the geometry information item associated with the same time point. The geometry information item and the attribute information item that are in association with the same time point are included in an access unit.