Magnetic recording and reproducing apparatus having multiple mag

Details Magnetic recording and reproducing apparatus having multiple mag Magnetic recording and reproducing apparatus having multiple mag

1991-06-14

1994-06-14

Callahan, Timothy P.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 65, 360 7714, H04N 578, G11B 5035, G11B 5584

Patent

active

053215575

ABSTRACT:
A magnetic recording and reproducing apparatus for recording and reproducing a video digital signal suitable to a narrowed track pitch having two magnetic heads with the same azimuth angle arranged with an overlapped area to reproduce the same track, and a tracking servo executing phase control such that a center of a reproducing track is brought to a center of the overlapped area of the two magnetic heads. Reproduced signals of the two magnetic heads are compared so that the reproduced output of the magnetic head having a good on-track condition is always selected to improve a tracking margin without increasing crosstalk disturbance from adjacent track.

REFERENCES:
patent: 4897739 (1990-01-01), Hasegawa et al.
patent: 4942487 (1990-07-01), Noguchi et al.
patent: 4972272 (1990-11-01), Morioka et al.
patent: 5087995 (1992-02-01), Nagasawa et al.
patent: 5124853 (1992-06-01), Kashida et al.
patent: 5157563 (1992-10-01), Nagasawa et al.
A. Hirota, "8 mm Video about the Video Signal Recording," Technical Report of the Institute of Television Engineers of Japan, VR61-1, pp. 1-6, Feb. 1984.
VTR Technology, NHK, pp. 73-105, Oct. 1980.

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