Image signal processor

Details Image signal processor Image signal processor

2006-09-26

2006-09-26

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07113206

ABSTRACT:
According to the present invention, it is possible to display an image signal with as a high picture quality as would have been obtained with a solid image pick-up device having color filters arrayed in a mosaic pattern. The image signal obtained from the solid image pick-up device with a Bayer array of the three primary colors of R, G, and B is separated by a color separation circuit4into R-color, G-color, and B-color signals. These color signals are attenuated by filters6, 8, 10respectively at half a horizontal sampling frequency in order to suppress the occurrence of moire noise. The G-color filter circuit 8 has a narrower attenuation band width than that of the R-color filter circuit6and the B-color filter circuit10. These color signals thus filtered are adjusted in level at a white balance circuit12and then mixed by addition at a mixer14, thus generating a luminance signal. By narrowing the attenuation band width of the G-color signal, the resolution can be kept high while suppressing the occurrence of moire noise.

REFERENCES:
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patent: 5508741 (1996-04-01), Hieda
patent: 6803950 (2004-10-01), Miyamoto et al.
patent: 7009639 (2006-03-01), Une et al.
patent: 2002/0033887 (2002-03-01), Hieda et al.
patent: 2001-0029750 (2001-04-01), None

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