Method and apparatus for the extraction of luminance information from a video signal using a field store
US4695876A · kind A · utility
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13Claims
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Key dates
| Filing date | Jul 15, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jul 15, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for the extraction of luminance information from an analog composite video signal. Non-luminance information in the video signal is 180.degree. out of phase between adjacent lines in adjacent fields of a video signal. Appropriately filtered adjacent fields are summed to cancel non-luminance information, leaving the desired luminance information. A field store is employed to allow the summing of adjacent fields by storing the present field to be summed with the next field of the video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.