3D Data Encoding and Decoding With Selective Octree Use
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Solution Overview
Problem
Existing three-dimensional data encoding methods lack efficiency and do not support random access functionality, necessitating improved compression and access mechanisms.
Innovation Solution
Implementing a method that dynamically selects between octree and alternative structures for encoding and decoding three-dimensional data, along with dividing data into random access units, and encoding these units to facilitate efficient encoding and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If octree structure encoding is used for all space units, then encoding completeness is improved, but encoding efficiency deteriorates due to excessive data volume
Solution Approach 1:
The patent changes the encoding parameter by introducing a flag bit (one bit of information) to indicate whether octree structure encoding should be applied to each space unit. This allows the encoding method to be dynamically adjusted based on the characteristics of each space unit, improving overall encoding efficiency while maintaining necessary completeness.
Solution Approach 2:
The patent segments the three-dimensional space into multiple space units and applies different encoding methods to different segments. By dividing the space and selectively applying octree encoding only where needed (indicated by the flag), the system avoids the inefficiency of universal octree encoding while preserving data completeness where required.
2Manufacturing precision
If octree structure encoding is used for all space units, then data representation accuracy is improved, but data transmission volume increases
Solution Approach 1:
The patent introduces a control parameter (flag bit) that changes the encoding approach based on space unit characteristics. This allows high-accuracy octree encoding to be applied only where necessary, reducing overall data transmission volume while maintaining representation accuracy where needed.
Solution Approach 2:
The patent segments the three-dimensional data into multiple space units with individual encoding decisions. By applying octree encoding selectively to specific segments rather than universally, the system reduces total data volume while preserving accuracy in regions where it matters most.
3Speed
If encoding method is simplified to improve processing speed, then encoding speed is improved, but encoding flexibility deteriorates
Solution Approach 1:
The patent uses a simple one-bit flag parameter to control encoding behavior, providing fast decision-making without complex processing. This maintains high encoding speed while preserving flexibility, as the flag can adaptively indicate different encoding strategies based on space unit characteristics.
Data Source
AI summary
A three-dimensional data encoding method includes: determining whether to encode, using an octree structure, a current space unit among a plurality of space units included in three-dimensional data; encoding the current space unit using the octree structure, when it is determined that the current space unit is to be encoded using the octree structure; encoding the current space unit using a different method that is not the octree structure, when it is determined that the current space unit is not to be encoded using the octree structure; and appending, to a bitstream, information that indicates whether the current space unit has been encoded using the octree structure.