| 摘要 |
<p>PURPOSE:To make it possible to record/reproduce radar image signal without remodeling a common VTR unit by inserting a sync signal for video tape recorder(VTR) into a blank time produced by time compression for every repetitive frequency. CONSTITUTION:A video signal VD received at a radar receiving section is converted through an A/D converter 10, synthesized through a synthesizing circuit 12 with a transmission trigger signal T, and recorded in an image recording memory 14. The read out clock is set higher than the write in clock for the memory 14. Consequently, the signal written in the memory 14 is subjected to time compression at the time of read out. A sync signal for VTR is inserted into a blank time produced through time compression. The insertion timing is determined for every repetitive frequency of the trigger signal T. A signal read out from the memory 14 is converted by a D/A converting circuit 16 and recorded in a VTR unit 102 through a writing circuit 22. A reproducing section 104 performs time expansion in reverse order and output a video signal VDO and a trigger signal TO to the radar.</p> |
