Arrangement for suppressing edge noise during playback of freque

Details Arrangement for suppressing edge noise during playback of freque Arrangement for suppressing edge noise during playback of freque

1988-12-28

1992-02-18

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 381, 358314, 358327, H04N 578

Patent

active

050899163

ABSTRACT:
An arrangement for suppressing edge noise during playback of frequency-modulated video signals recorded on tape, in which the frequency-modulated video signals are supplied to a first demodulator, and the signals at the output of this demodulator are delayed by substantially one line length. The delayed signals are then applied to a second demodulator, and the signals obtained from latter are filtered in a band-pass filter which transmits only signals between 0.5 and 2 MHz. The signals from the first demodulator and the filtered signals are superposed, and the superposed signals are used as luminance signals for playback.

REFERENCES:
patent: 3629494 (1971-12-01), Hurst
patent: 3943274 (1976-03-01), Pickopp et al.
patent: 4291330 (1981-09-01), Hiroi
patent: 4302768 (1981-11-01), Kamura
patent: 4492988 (1985-01-01), Hashimoto et al.
patent: 4591930 (1986-05-01), Baumeister
patent: 4607285 (1986-08-01), Hirota
patent: 4635104 (1987-01-01), Hausdorfer et al.

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