Tracking apparatus for a magnetic recording and playback apparatus with independent control of audio head with respect to video head
US5138505A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1989 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Dec 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tracking apparatus for a magnetic recording and playback device of a helical scan system including at least one audio head and at least one video head provided on a rotating cylinder for enabling recording and playback of an audio signal and a video signal onto and from a magnetic tape which is driven by a capstan motor. The tracking apparatus includes a tracker for detecting an audio tracking error of the audio head for an audio track of the magnetic tape and for generating a tracking compensation signal corresponding to the amount of audio tracking error, and a controller responsive to the tracking compensation signal for controlling the rotary phase of the capstan motor in accordance therewith so that the audio head correctly tracks the audio track of the magnetic tape and is controlled independently of control of the video head for video tracking error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.