Video signal processing circuit for a video camera having a recursive-type noise reducer
US5428391A · kind A · utility
14Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Jun 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Auto focus control and/or auto exposure control is carried out by using a luminance signal before gamma correction, before addition of aperture signal but after hand shake correction. Auto white balance control is carried out by using a color signal after hand shake correction. Consequently, precise auto focus control, auto exposure control and/or auto white balance control can be done. The field memory for electronic zooming and/or hand shake correction is also used as a field memory for noise reduction. Consequently, a video signal processing circuit which is inexpensive and simple can be implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.