TV video data input apparatus

摘要

A TV video data input apparatus samples and quantizes a video signal from a TV camera and feeds the quantized data into a computer. The input apparatus is provided with means for generating sampling clocks different from each other while selectively changing over the sampling clocks correspondingly to characteristics of a TV picture. An A/D converting means is driven by the sampling clocks to convert the video signal into digital video data. The output of the A/D converting means is written in a memory. Thus, it is possible to switch over the writing of the video data into a memory having a short access time at a high speed and that into a memory having a long access time at a low speed.