| 摘要 |
<p>PURPOSE:To satisfactorily reproduce a digital sound signal by detecting approachment between write and read of a regenerative memory in timing at the time of variable speed particular reproducing, resetting the timing of write and read in a data field repeatedly, measuring a time base error of a regenerative signal and correcting tape speed information. CONSTITUTION:A function for sending a flag to a regenerative memory controller 14 when a field data under reproducing is not renewed is added to a field renewal detecting circuit 16. In a field length measuring circuit 23 under a low speed particular reproducing mode, a time base variation of a tape regenerative signal is detected, and when this difference is below a specified value, and only at the time of reproducing a data in the same field repeatedly, a sequence on the write side or the read side is jumped. Then, an error of speed information to be supplied to a particular regenerative field memory 17 is corrected, and read-out timing is controlled, and then this is converted into a frequency in proportion to the tape reproducing speed and outputted. By this method, the digital sound signal is satisfactorily be reproduced.</p> |
