Reducing computational complexity when video encoding uses bi-predictively encoded frames
US11388434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Apr 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Several techniques aimed at reducing computational complexity when encoding uses bi-predictively encoded frames (B-frames) are implemented in a video encoder. In an embodiment, B-frames are not used as reference frames for encoding P-frames and other B-frames. Non-use of B-frames allows a de-blocking filter used in the video encoder to be switched off when reconstructing encoded B-frames, and use of a lower complexity filter for fractional-resolution motion search for B-frames. In another embodiment, cost functions used in motion estimation for B-frames are simplified to reduce computational complexity. In one more embodiment, fractional pixel refinement in motion search for B-frames is simplified. In yet another embodiment, predictors used in motion estimation for a macro-block in a P-frame are selected from a B-frame that uses a same reference frame as the P-frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.