Attribute residual coding in g-pcc
By determining in G-PCC that when the residual value of all components except one component of the multi-component attribute of a point cloud is zero, only the value of that component is encoded as the residual value minus the offset, the redundancy problem in point cloud encoding and decoding is solved and the data transmission efficiency is improved.
CN115699771BActive Publication Date: 2026-03-20QUALCOMM INC
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Patent Information
- Application Number
- CN202180040218.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2021-06-08
- Filing Date
- 2021-06-09
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2041-06-09
AI Technical Summary
Technical Problem
In geometric point cloud compression (G-PCC), the independent encoding and decoding of residual values of multi-component attributes of points is redundant, resulting in low data transmission efficiency.
Method used
By determining that the residual value of all components except one in the point cloud is zero, only the value of that component is encoded as the residual value minus the offset, and this is notified by a signal in the bit stream, thus reducing the amount of data.
Benefits of technology
This effectively reduces the amount of data that the G-PCC encoder and decoder need to transmit and receive, thus improving data transmission efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
An example method of encoding a point cloud includes determining that residual values of all but one component of an attribute of a point in the point cloud are equal to zero, determining, based on the determination that the residual values of all but the one component of the attribute are equal to zero, that a value of the one component is equal to a magnitude of a residual value of the one component of the attribute minus an offset, encoding the value of the one component, and signaling the encoded value in a bitstream.
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