Digital signal reproducing apparatus having improved pilot level

Details Digital signal reproducing apparatus having improved pilot level Digital signal reproducing apparatus having improved pilot level

Filed on

1987-07-20

Date issued

1991-03-26

Examiner

Canney, Vincent P.

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Automatic control of a recorder mechanism

SubSubClass

Controlling the head

Other Related Categories

360 7714, G11B 5584

Type

Patent

Status

active

Patent number

050034146

Description

ABSTRACT:
In a digital signal reproducing apparatus which reproduces digital PCM audio signals that have been recorded on a track helically formed on a recording medium with the use of a rotary head, various failsafe techniques are incorporated. For example, it is checked if the signal level sampled according to a sync signal is normal or abnormal, and if it is abnormal, the sync signal is judged to be the remainder of the previous signal that has not been completely erased and no capstan servo control will be performed on the basis of this abnormal signal level, whereby the control of capstan servo is not disturbed.

REFERENCES:
patent: 4656539 (1987-04-01), Sugiki et al.
patent: 4714971 (1987-12-01), Sigiki et al.
patent: 4739420 (1988-04-01), Odaka et al.
patent: 4755893 (1988-07-01), Yamada et al.

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