| 摘要 |
<p>PURPOSE:To easily attain tracking adjustment even when the reproduction speed is revised by obtaining a revision corresponding to other reproduction mode based on a tracking revision reference in the tracking in a reproduction mode and applying the tracking adjustment of the other reproduction mode through the use of the revision. CONSTITUTION:The tracking value in other reproduction mode is obtained based on the initial value T and the revision reference value (t) in the tracking of a reproduction mode and the tracking adjustment at the reproduction of other mode is attained based on the tracking value. That is, when a control pulse is reproduced with delay of (t) in comparison with the tracking initial value T at the normal reproduction, the tracking value consists of the initial value T and the revision reference value (t). In the case of the n-multiple speed reproduction, a tracking value of 'T+t/n' is set. Thus, a proper tracking in other reproduction mode is obtained by asserting the tracking initial value and the revision reference value in one reproduction mode. Thus, a complicated operation applying tracking adjustment in each speed mode is avoided.</p> |
