| 摘要 |
<p>A method and apparatus is disclosed for automatically maintaining a transducing head on the proper track and is particularly adapted for a helical scan recording and reproducing apparatus that is capable of providing special motion effects, such as slow, still and fast motion, and other effects. The apparatus is of the type which utilizes transverse positioning of the transducing head to accurately follow a track during reproducing and, at the completion of the track, to properly position the head in position to either play the next adjacent successive track. replay the same track or play another track so that the appropriate special motion effect is achieved. The apparatus of the present invention produces a continuous stable, noise free video picture without breakup, when the apparatus is switched from one mode to another, i.e.. from a slow/ still motion mode to a normal speed reproducing mode.</p> |
