Recording/reproducing apparatus

Details Recording/reproducing apparatus Recording/reproducing apparatus

1994-04-18

1995-05-02

Hajec, Donald

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

360 362, G11B 500, G11B 578

Patent

active

054125138

ABSTRACT:
A recording/reproducing apparatus in which the number of revolutions of a recording head 14 is controlled depending on the frequency of the vertical synchronization signals for picture signals supplied from outside for digitally recording/reproducing picture data. It is not the recording head 14 but the playback head 16 whose number of revolutions is controlled in such manner during reproduction. In forming DRCK control signals employed for controlling the number of revolutions of the recording head, the frequency of the vertical synchronization signals for the picture signals supplied from outside is corrected so as to be within a range of offset of .+-.1% relative to the frequency of standard frequency vertical synchronization signals, and the DRCK control signals are formed based upon the vertical synchronization signals corrected in this manner. This permits picture data to be recorded so as to assure interchangeability between different apparatus of the same version, and makes it possible to improve the stability after phase capturing of, for example, a DRCKPLL circuit 34 designed to form the DRCK control signals.

REFERENCES:
patent: 4860090 (1989-08-01), Murata et al.
patent: 4985757 (1991-01-01), Yasuki et al.
patent: 5216496 (1993-06-01), Miyamoto et al.
patent: 5239381 (1993-08-01), Takahashi
patent: 5291469 (1994-03-01), Yoshinaka
Siegel et al., "Modulation & Code for Information Storage", IEEE Magazine, pp. 68-86, Dec. 1991.

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