Motion field estimation based on motion trajectory derivation
US11917128B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2020 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Jan 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/573
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A motion field estimate determined using motion vector information of two or more reference frames of a current/encoded frame is used to derive a motion vector for inter-prediction of the current/encoded frame. Motion trajectory information, including concatenated motion vectors and locations of the current/encoded frame at which those concatenated motion vectors point, is determined by concatenating motion vectors of the reference frames. A motion field estimate is determined using the motion trajectory information and, in some cases, by interpolating unavailable motion vectors using neighbors. The motion field estimate is used to determine a co-located reference frame for the current/encoded frame, and an inter-prediction process is performed for the current/encoded frame using a motion vector derived using the co-located reference frame. During decoding, the motion field estimate may be determined using motion vectors signaled within a bitstream and without additional side information, thereby improving prediction coding efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.