Automatic tracking system for magnetic recording and/or reproducing apparatus
AssigneeSony Corporation
InventorNobuharu Takayanagi
Life of this patent
Estimating the term…
Abstract
An automatic tracking system for a magnetic recording and/or reproducing apparatus is provided means for varying a phase relationship between a magnetic head and a recording track and for monitoring the level of signals reproduced by a magnetic head at various phase relationships, and means for detecting an optimal point which is centroid of the reproduced signal levels. The automatic tracking system further includes means for controlling a tape feed speed so as to establish the phase relationship of the magnetic head and the recording track, which phase relationship corresponds to an optimal phase relationship.
Claims9
A magnetic reproducing apparatus comprising:
- a rotary head drum assembly carrying a magnetic head for reproducing information recorded on a recording track of a magnetic recording medium;
- a drive system for feeding said magnetic recording medium over said rotary head;
- first means, associated with said drive system, for controlling a feeding speed of said magnetic recording medium for adjusting a phase relationship between said magnetic head and said recording track to a predetermined phase relationship;
- second means, cooperative with said first means, for periodically varying said predetermined phase relationship by a predetermined magnitude so that the phase relationship between said magnetic head and said recording track is sequentially shifted;
- third means for monitoring the level of a signal reproduced by said magnetic head and sampling the signal level at every occurrence of a predetermined sampling timing;
- and
- fourth means for processing a predetermined number of sampled signal levels for deriving a center of integration thereof for setting said predetermined phase relationship to said center of integration, said center of integration corresponding to a summation of said sampled signal levels divided by a divisor corresponding to the predetermined magnitude over which said phase is varied.
Dependencies are inferred from the claim text.