PAL System Color Camera with Single-chip MOS Imager

Abstract

A PAL System Color Camera has been developed by using a single-chip MOS imager. The PAL system imager requires 20% increase in horizontal and vertical resolutions, compared to an NTSC imager. Such higher density should decrease the sensitivity and yield.
So, the pixel position was shifted by a half pixel-pitch line by line, Using this unique pixeld disposition has successfully improved the horizontal resolution without increasing the horizontal pixels in number from those for an NTSC imager.
The color camera system using this MOS imager employs the following circuits to support the unique pixel disposition imager; 1) New signal processing circuit which includes video signal delay and sampling. 2) New sync. and drive circuit which operate with independent frequency.