| 摘要 |
In a magnetic disk recorder, a displacement of recording timings of a video signal and a timebase-compressed audio signal on a master disk (Dm) can be corrected on a slave disk (Ds). When an output of a master disk reproducing apparatus (10) is a video signal, a vertical synchronizing signal from a synchronizing separating circuit (31) is delayed by a delay time of substantially 7H (H is the horizontal period) and supplied to a phase servo circuit (23) in a slave disk recording apparatus (20) as a reference signal, while when the output of the master disk reproducing apparatus (10) is the timebase-compressed audio signal, a start flag signal accompanying with the timebase-compressed audio signal is detected by a flag detecting circuit (36) and the start flag signal thus detected is employed as a pseudo vertical synchronizing signal, which is supplied to the phase servo circuit (23) in the slave disk recording circuit (20) as a reference signal. <IMAGE>
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