| 摘要 |
<p>PURPOSE:To prevent inter-music detection malfunction by using an inter-music detection time constant storage means so as to count at the non-signal output of a signal detection means and discriminating it as an inter-music when the results reaches the 1st time constant or the 2nd time constant and giving an output to change an address to a present address storage means. CONSTITUTION:A head reaches a non-signal part between the 1st music and the 2nd music at a time T5, the presence of inter-music is discriminated by setting an inter-nmusic detection time constant tau2 shorter to a time DELTAt2 required to pass the non-signal part at that time, the address stored in a present address storage means 9 is changed from 1 to 2, further the address stored in the present address storage means 9 by the 2nd discrimination means 11 is confirmed and tau1 (<tau2) is set to the time constant storage means 11. The 1st discrimination means 8 is provided to a start storage means 2 and a beginning end detection means 7 and the arrival to the tape winding start is detected in the direct channel selection state and the time constant of the time constant storage means 10 is converted from tau1 into tau2 corresponding to the mean scanning speed. Thus, the inter-music detection malfunction at the signal interruption part in the music at the 1st music running is prevented.</p> |
