| 摘要 |
<p>In an apparatus for automatically maintaining a transducing head assembly on the proper track, which is particularly adapted for a helical scan recording and/or reproducing apparatus capable of providing special motion effects, movable head automatic position acquisition circuit and method is disclosed. The apparatus is of the type which utilizes transverse positioning of the transducing head assembly to accurately follow a track during reproducing, and at the completion of the track, to properly position the head in postion to either play ID-2632 the next adjacent successive track, replay the same track or replay another track so that the appropriate special motion effect is achieved. In the still frame motion mode of operation, the head is normally reset to rescan one or more tracks repetitively by a head tracking servo. A missing head reset detector circuit detects the failure of the servo to timely reset the head at the end of the scan of the track or tracks and applies a plurality of properly spaced head reset signals to the movable head assembly to position the head so that the head tracking servo can acquire control over head tracking.</p> |
