| 摘要 |
<p>PURPOSE:To eliminate a compression and expansion phenomenon of a regenerative signal and to enhance the reproducing picture quality at the time of changing over to a reproducing mode by correcting a tape feed system speed detecting output and a rotating speed detecting output respectively based on their outputs in response to the changeover to the reproducing mode. CONSTITUTION:In response to the changeover to the reproducing mode by its external operation, an error detecting output from a switch circuit SW1 is corrected by a speed correcting calculation part 23 in a drum servo system SA by comparing a detecting output of a speed system error detector 16 in a capstan servo system with an error detecting output of a speed system error detector 12, and according to a comparison result. Then, in comparing a deviation ratio of the rotating speed of a drum from a prescribed value with that of a capstan by comparing the error detecting output from the error detector 12 in the drum servo system SA with the error detecting output of the speed system error detector 16 from a switch circuit SW2, the error detecting output from the SW2 is corrected by a speed calculation correcting part 24 in the capstan servo system SB in accordance with a comparison result.</p> |
