Tracking error detection system having at least two magnetic hea

Details Tracking error detection system having at least two magnetic hea Tracking error detection system having at least two magnetic hea

1992-11-10

1994-05-17

Majec, Donald

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 51, G11B 5584, G11B 509

Patent

active

053133463

ABSTRACT:
Disclosed is a tracking error detection system in a digital magnetic recording/reproducing apparatus for recording/reproducing a digital signal, in which a digital signal recorded by means of a magnetic head having an azimuth is reproduced to thereby produce a reproduction clock signal and the phase or period of the reproduction clock signal is measured to thereby detect a tracking error. Since the tracking error can be known every time the phase or period of the reproduction clock signal is measured, it is possible to detect the tracking error including the linearity of a recording track and it is possible to improve the accuracy in tracking error detection. Further, since no pilot signal or the like is frequency-multiplexed on a low frequency, the recording digital is not affected.

REFERENCES:
patent: 4209810 (1980-06-01), Ragle et al.
patent: 4527207 (1985-07-01), Owaki et al.
patent: 4746976 (1988-05-01), Furuhaton et al.
patent: 5057949 (1991-10-01), Suga et al.
Yamada, et al., "Tracking servo System Using Four-Different Frequency Pilot Signals", National Technical Report, vol. 31, No. 6, pp. 115-124, Dec. 1985.
"Standardization of `8mm Video`", Television Digest, vol. 23:14, Apr. 4, 1983.
Ryo Takahashi (Nippon Hoso Kyokai), "VTR Technology", pp. 72-75.

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