Video coding using frame rotation
US10382767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2017 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Jul 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video frames are rotated for encoding and decoding blocks therein. During an encoding process, a number of degrees to rotate a video frame is determined. The video frame is rotated to produce rotated pixel values. A prediction residual is then generated for a block to be encoded based on the rotated pixel values. That block is encoded based on the prediction residual. During a decoding process, an encoded block is decoded to produce inverse transform pixel values, and a number of degrees to inverse rotate an encoded video frame is determined. The encoded video frame is inverse rotated to produce inverse rotated pixel values corresponding to the inverse transform pixel values. The inverse rotated pixel values are then outputted to an output video stream. One or more syntax elements indicating the number of degrees can be encoded to a bitstream during encoding and decoded from the bitstream during decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.