| 摘要 |
<p>PURPOSE:To form a stable reproduced picture by expanding a noise pull-in ranger after making a tape traveling phase changing state takes its one round. CONSTITUTION:After the tape traveling phase changing state takes its one round, namely when a tracking control means 7 changes a tracking center value ten times for instance, an initial reference value is changed. For this purpose, after the tracking control means 7 changes the tracking center value ten times, it inputs a reference value changing pulse to a reference value setting means 8, and the reference value setting means 8 changes the initial reference value, and if the pull-in of a noise can not executed in this expanded noise pull-in range, the reference value is increased, and the noise pull-in range is continued to be expanded until the noise pull-in is completed. Thus, a desirable tracking state is detected irrespective of a recording state or a reproducing state, and the reproduced picture comes to be stabilized.</p> |
