Automatic recording mode detecting apparatus for use in video ta

Details Automatic recording mode detecting apparatus for use in video ta Automatic recording mode detecting apparatus for use in video ta

1990-06-14

1992-11-17

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 27, 358335, H04N 578

Patent

active

051648628

ABSTRACT:
A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.

REFERENCES:
patent: 4663673 (1987-05-01), Doutsubo
patent: 4811122 (1989-03-01), Kido et al.
patent: 4989102 (1991-01-01), Murabayashi et al.
patent: 4991027 (1991-02-01), Enoki
patent: 5003407 (1991-03-01), Nakano et al.

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