Image data encoding/decoding method and apparatus
US11202005B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2021 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Mar 24, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/96
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for decoding a 360-degree image includes: receiving a bitstream obtained by encoding a 360-degree image; generating a prediction image by making reference to syntax information obtained from the received bitstream; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Generating the prediction image includes: obtaining, from motion information in the syntax information, a motion vector candidate group including a motion vector of a block adjacent to a current block to be decoded; deriving a prediction motion vector from the motion vector candidate group based on selection information extracted from the motion information; and determining a prediction block for the current block to be decoded, using a final motion vector derived by adding the prediction motion vector to a differential motion vector extracted from the motion information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.