Co-located reference frame interpolation using optical flow estimation
US11284107B2 · kind B2 · utility
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Key dates
| Filing date | Aug 22, 2017 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical flow reference frame is generated that can be used for inter prediction of blocks of a current frame in a video sequence. A first (e.g., forward) reference frame and a second (e.g., backward reference frame) are used in an optical flow estimation that produces a respective motion field for pixels of the current frame. The motion fields are used to warp the reference frames to the current frame. The warped reference frames are blended to forms the optical flow reference frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.