Motion compensation at a finer precision than motion vector differential
US11070838B2 · kind B2 · utility
5Cited by
1References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/523
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Extra precision can be added to motion vectors, such as those obtained using advanced motion vector prediction or frame rate upconversion, to produce improved motion compensation. The increased precision from neighboring blocks are used to provide increased precision to a motion vector for a current block. In various embodiments, the derivation of the increased precision can be found through various methods. In other embodiments, refined motion vectors can be saved for use in subsequent predictions, and a rate distorion optimized selection can be performed for determining whether or not to use the refinement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.