Apparatus and a method for variable speed searching of recorded pictures
US5615018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9262
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for variable speed searching of recorded pictures on a storage medium is disclosed. The apparatus comprises a recording-playback device which records pictures and an information value signal, and plays back the recorded pictures. A speed controller responsive to the information value signal adjusts the speed of the recording-playback device during a fast-scan search (i.e., fast-forward or fast-backward search). The fast-scan search speed is adjusted so that the recorded pictures with high information values are played back at a slower fast-scan speed and the recorded pictures with low information values are played back at a faster fast-scan speed. The information value signal is generated during recording or during playback. The information value signal has a low value when a correlation between temporally successive recorded pictures is high, and a high value when the correlation is low, the correlation depends upon temporal redundancy between the successive video pictures. In short, an apparatus and a method for variable speed searching of recorded pictures is provided in which the fast-scan speed is automatically adjusted to allow for viewing of static …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.