Apparatus for releasing a restriction on the recording of an inf

Details Apparatus for releasing a restriction on the recording of an inf Apparatus for releasing a restriction on the recording of an inf

1988-06-30

1990-10-23

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

380 4, G11B 1504

Patent

active

049656805

ABSTRACT:
A recording/reproducing system according to this invention for use in, for example, a digital audio tape recorder is applied to a type in which recording of an input information signal on a recording medium is restricted, and can ensure releasing of the recording restriction by using release-signal-holding mediums on which a release signal for releasing the recording restriction is recorded. In this case, the release signal is affixed with frequency data for restricting the quantity of the information signal to be recorded on recording medium, and this frequency data is updated in such a way that the greater the number of recording the information signal on recording medium, the smaller the recordable quantity of the information signal.

REFERENCES:
patent: 4550350 (1985-10-01), Billings
patent: 4598288 (1986-07-01), Yarbrough et al.
patent: 4707750 (1987-11-01), Anderson et al.
patent: 4740890 (1988-04-01), William
patent: 4775901 (1988-10-01), Nakano
patent: 4785361 (1988-11-01), Brotby
patent: 4791565 (1988-12-01), Dunham et al.
Digital Audio Taperecorder System (R-DAT) Recommended Design Standard--2nd draft--Part II, p2. Dat Conference, Apr. 16, 1988, Definition of the Copy Inhibit Data (ID-7) on the DAT Standard is shown.

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