Apparatus and method for decoding SECAM chrominance signal
US7535514B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 25, 2005 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Aug 31, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/186
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
We describe an apparatus and method for decoding a SECAM chrominance signal. The apparatus may include a band-pass filter to separate the chrominance signal from the composite video baseband signal. A down-mixer down mixes the chrominance signal from a high to a low frequency band to generate two signals having a substantially 90° phase difference. A cloche filter filters the two signals. A differentiator differentiates the cloche filtered signals. A multiplier squares each differentiated signal. An adder sums the squared result while a square root takes the square root of the sum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.