| 摘要 |
PCT No. PCT/JP90/01193 Sec. 371 Date May 14, 1992 Sec. 102(e) Date May 14, 1992 PCT Filed Sep. 18, 1990 PCT Pub. No. WO92/05666 PCT Pub. Date Apr. 2, 1992.In a video signal transmission/reception system based on interlace scanning, video signals picked up by the sequential scanning are limited in vertical frequency band by filters (3a), (3b) and (3c) and transmitted as an interlace scanning video signal. Then, a signal of a predetermined vertical frequency band is extracted from the signal thus transmitted and a motion detection is carried out on the basis of the thus extracted signal.
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