Tracking control system for an information signal recording and reproducing apparatus
US4438465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1981 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Dec 14, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/1808
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for simultaneously reproducing information signals that have simultaneously been recorded in four successive, parallel channel tracks on a record medium, with a first pair of first and second ones of the four channel tracks being adjacent to each other and having the information signals recorded therein with different azimuth angles and with the information signals recorded in one of the first or second channel track being delayed relative to the information signals recorded in the other of the first and second channel tracks, and with a second pair of the remaining third and fourth ones of the four channel tracks being adjacent to each other and having the information signals recorded therein with different azimuth angles; said apparatus including four magnetic heads movable in a direction along the four channel tracks for reproducing the signals recorded therein; and a tracking control circuit for controlling the relative positions of the four magnetic heads and the record medium so that the four magnetic heads accurately scan respective ones of the four channel tracks in response to the phase difference between the signals recorded in the first pair of channel tracks o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.