Noise-eliminating apparatus for a video tape recorder

Details Noise-eliminating apparatus for a video tape recorder Noise-eliminating apparatus for a video tape recorder

1984-05-15

1987-04-07

Faber, Alan

Dynamic magnetic information storage or retrieval

Record editing

360 64, 360 381, 358336, 358340, H04N 5782, H04N 594

Patent

active

046565310

ABSTRACT:
A noise-eliminating apparatus for a video tape recorder wherein the high frequency signals of the first and second channels, reproduced by a helical scan type video tape recorder, an alternately selected by the corresponding first and second switches. The selected high frequency signal is supplied to the main demodulator and auxiliary demodulator. The changeover operations of the first and second switches are carried out at a prescribed internal by the first and second control signals. An output signal from the main demodulator in shut off by a third switch during the period in which the high frequency signals of the first and second channels partly overlap each other. The shut off period is supplemented by an output demodulated signal from the auxiliary demodulator.

REFERENCES:
patent: 3346702 (1967-10-01), Heizer
patent: 4032966 (1977-06-01), Kenney
patent: 4542418 (1985-09-01), Yoneyama
patent: 4559567 (1985-12-01), Maruichi

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