Tape address synchronizing apparatus for video tape recorder
US4587574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1984 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | May 22, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for synchronizing the playback of magnetic tape, use in a VTR, to a reference signal. Reference addresses which are synchronized to the reference signal and tape addresses which are derived from and correspond to video frames located on the tape are generated. The playback speed of the tape is controlled by a capstan servo to select a speed at which the tape addresses and the reference addresses are synchronized. Each tape section corresponding to a single tape address is further subdivided into auxiliary segments which are identified by an auxiliary address. After a reference address and a tape address have been synchronized, the auxiliary address is compared against a predetermined value and the tape is momentarily accelerated or decelerated to further align the tape to the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.