Digital signal tape recording/reproducing apparatus with improve

Details Digital signal tape recording/reproducing apparatus with improve Digital signal tape recording/reproducing apparatus with improve

1987-09-08

1989-10-17

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 18, 360 27, 360 32, 360 7714, 360 70, G11B 5584, G11B 15467

Patent

active

048751154

ABSTRACT:
A digital signal reproducing apparatus which reproduces digital PCM audio signals recorded on a recording medium in the form of single helical tracks. The apparatus is provided with at least two rotary heads for reproducing signals on the recording medium. The apparatus, however, is not provided with an erase head. Previously recorded signals are erased by overwriting, as a result of which a problem may arise in which a sync signal remains unerased. Therefore, a level of a pilot signal frequency component sampled in response to the sync signal is compared with a predetermined level to see if the sampled level is appropriate. It it is not appropriate, capstan servo control is not performed.

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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