Techniques for detecting a pulldown field sequence
US7808552B1 · kind B1 · utility
4Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Oct 25, 2006 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0147
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques for distinguishing a pulldown field sequence from a normal field sequence are disclosed. According to one aspect of the techniques, the method for detecting pulldown field sequence comprises receiving a field sequence, combining two adjacent fields into one frame, detecting whether the combined frame has a combing phenomenon, if there is such a combing phenomenon, and determining a number of how many times the combing phenomenon occurs continuously in the combined frame. Based on the number, it can be determined whether the field sequence is a normal field sequence or a pulldown field sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.