Speed controlling circuit of dubbing recorder and dubbing equipment using the speed controlling circuit

摘要

PCT No. PCT/JP97/04411 Sec. 371 Date Aug. 10, 1998 Sec. 102(e) Date Aug. 10, 1998 PCT Filed Dec. 3, 1997 PCT Pub. No. WO98/26588 PCT Pub. Date Jun. 18, 1998A speed control circuit for a dubbing recorder includes a demodulation circuit which receives a video signal for dubbing from a master VTR, a sync separation circuit to separate a sync signal from the output signal of the demodulation circuit, a detection circuit to detect the frequency of a portion of the video signal using the sync signal, and a system control circuit to determine the speed mode of the master VTR based on the output signal of the detection circuit.