| 摘要 |
A video signal processing apparatus which can perform a liquid crystal display without a deterioration of a picture quality even when a CCD sensor of the NTSC system is used at the time of the PAL system is provided. The video signal processing apparatus has a 1H delay circuit and a selecting circuit. Upon PAL system, by switching the selecting circuit once every seven lines and performing a pre-interpolation, the lines are compensated from 485 lines (vertical) of the NTSC system to 575 lines (vertical) of the PAL system. In case of performing the liquid crystal display, the timing of an interpolation (LCOMP) signal is synchronized with the timing of the EN signal upon PAL system so as to coincide the portion of the lines to be compensated from 485 lines (vertical) of the NTSC system to 575 lines (vertical) of the PAL system with the portion to be thinned out at a rate of 1 line per 7 lines in the liquid crystal display. Thus, even if the CCD sensor of the NTSC system is used upon PAL system, the liquid crystal display panel can display an image without a deterioration of a picture quality.
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