Rotary head type digital signal reproducing apparatus with slow tape speed mode and improved tracking control
US5008764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1988 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Mar 16, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1806
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotary head type digital signal reproducing apparatus controls tracking of rotary magnetic heads based on tracking reference signals obtained in an end portion of a first scan and in a beginning portion of a second scan immediately after the first scan, out of successive first through fourth scans made by the rotary magnetic heads with respect to two mutually adjacent tracks on the magnetic tape, when playing the magnetic tape which has been recorded in a half-speed mode. In the half-speed mode, a rotational speed of the rotary magnetic heads and a tape transport speed of the magnetic tape are set to speed which are one-half those in a standard mode. But when playing on the reproducing apparatus the magnetic tape which has been recorded in the half-speed mode, only the tape transport speed is set identical to that in the half-speed mode, and the rotational speed of the rotary magnetic heads is set identical to that in the standard mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.