METHOD OF RECORDING CUE SIGNAL AND DETECTOR THEREFOR.

摘要

This invention relates to a magnetic recording/reproduction apparatus such as VTR, DAT, and the like. A cue signal is recorded in advance as a position mark for making an automatic operation or automatic edition along with the contents of a program. The frequency of the cue signal is selected in an audio signal band. The cue signal is recorded along with audio signals in a time-division multiplexing way on an auxiliary audio track (24) of a magnetic tape (21). A silent zone is disposed before a cue signal recording region, and a cue signal is judged to be a correct one when the cue signal is detected by a filter after this silent zone is detected. A counter (6) determines the frequency ratio between the cue signal and a control signal (CTL). The CPU (7) discriminates the cue signal on the basis of this frequency ratio. A reproduction signal is divided into blocks and the cue signal is detected from the frequency distribution of the frequency. The present invention makes it possible to improve the efficiency of recording and reproduction of the cue signal, simplify the detection structure and make correct detection.