Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-03-16
1991-04-16
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 32, 360 70, 360 7305, 360 7714, G11B 5584, G11B 15467
Patent
active
050087649
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.
REFERENCES:
patent: 4755893 (1988-07-01), Yamada et al.
patent: 4839755 (1989-06-01), Yamada et al.
Ueno Shoji
Yamada Yasuhiro
Yoshida Shiro
Faber Alan
Garland Steven R.
Victor Company of Japan Ltd.
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