Identifying film frames in a video sequence
US5565998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Feb 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for identifying automatically from an interlaced video recording the frames of an original cine-film sequence from which the video recording has been derived. The apparatus includes an evaluation for evaluating, for each successive pair of fields, a function measuring correlation between adjacent odd and even picture lines taken from the first and second fields of the pair, respectively; a comparator for comparing the correlation function of each field pair with that of at least one neighboring pair in the sequence; and a selector for identifying pairs with greater correlation than their neighbors as being derived from the same original film frame. The original frames are reconstructed and fed to an MPEG motion picture encoder to obtain high quality compressed video, Also provided is automatic scene cut detection which allows adaptive operation of the MPEG encoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.