Pull-down signal detecting apparatus, pull-down signal detecting method, and video-signal converting apparatus
US8203650B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2007 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0112
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An inter-field pull-down pattern detecting circuit determines whether an input video signal is a first pull-down signal or a second pull-down signal, on the basis of input plug information and a pattern of the consecutive inter-field correlation levels, obtained from an inter-field correlation determination circuit. A counter counts the number of times the pattern detecting circuit determines that the input video signal is the first pull-down signal. The counter is reset to “0” when the input video signal is determined to be other than the first and second pull-down signals. When the count of the counter exceeds a preset value, the input video signal is finally determined to be the first pull-down signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.