Method for obtaining image reference block in a code of mode of fixed reference frame number
US7974344B2 · kind B2 · utility
4Cited by
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7Claims
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Key dates
| Filing date | Jul 8, 2004 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Jul 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/577
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A “rounding to zero” method can maintain the exact motion vector and can also be achieved by the method without division so as to improve the precision of calculating the motion vector, embody the motion of the object in video more factually, and obtain the more accurate motion vector prediction. Combining with the forward prediction coding and the backward prediction coding, the present invention realizes a new prediction coding mode, which can guarantee the high efficiency of coding in direct mode as well as is convenient for hardware realization, and gains the same effect as the conventional B frame coding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.