Volumetric Video Bitstream Flags for Point Cloud Decoding
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Solution Overview
Problem
Existing V3C systems face inefficiencies and increased complexity when handling a wide range of point cloud data, failing to effectively compress and decode volumetric video content.
Innovation Solution
A visual volumetric video-based coding (V3C) method and system that includes decoding and encoding flags and syntax elements to manage duplicated points, depth differences, and extension data, optimizing bitstream structure for improved compression and decoding of volumetric video.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing V3C systems use traditional coding methods for volumetric video, then the system can process point cloud data, but the compression efficiency decreases and system complexity increases when handling a wide range of point cloud data
Solution Approach 1:
The patent segments the volumetric video decoding process into multiple independent flag-based control mechanisms. Each flag (first flag for duplicated points, second flag for depth values, third flag for extension data) independently controls a specific decoding operation, allowing the system to handle diverse point cloud data through modular decision-making without increasing overall system complexity
Solution Approach 2:
The patent implements dynamic decoding behavior through conditional flags that adapt the decoding process to different data characteristics. The decoder dynamically adjusts its behavior based on the presence or absence of specific flags in the bitstream, enabling efficient handling of various point cloud configurations without requiring complex fixed algorithms
2Reliability
If the bitstream structure is standardized for V-PCC and V3C systems, then compatibility and reliability improve, but the flexibility to handle different volumetric content formats decreases
Solution Approach 1:
The patent creates a universal flag-based syntax structure that can accommodate multiple volumetric content formats within a single standardized framework. The same bitstream structure with optional flags can handle different point cloud configurations, depth representations, and extension data types, making the system both reliable for standard compliance and flexible for format versatility
Solution Approach 2:
The patent embeds optional extension data and syntax elements within the main bitstream structure in a nested manner. The core standardized structure remains intact while optional flags and associated data can be included or excluded, allowing the system to maintain standard compatibility while accommodating extended formats through nested optional components
Data Source
AI summary
A visual volumetric video-based coding (V3C) method, applied to a decoder and includes: decoding, from a bitstream of a volumetric video, a first flag indicating whether a plurality of duplicated points are reconstructed for a current atlas, where each of the plurality of duplicated points is a point with same geometry coordinates as another point from an associated lower indexed map with a same patch; setting a first default value to the first flag to indicate that the plurality of duplicated points are not reconstructed in response to the first flag being not present; and decoding a volumetric content from the bitstream to reconstruct the volumetric video according to a value of the first flag.