Video disc player with RFI reduction circuit

Details Video disc player with RFI reduction circuit Video disc player with RFI reduction circuit

1980-11-07

1982-04-27

Wolff, John H.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

360 38, 3581285, 455303, 375102, H04N 580

Patent

active

043274323

ABSTRACT:
Under certain conditions a video disc player can be responsive to externally applied interference signals to provide a defect in the display of the information recovered from the disc. Apparatus is provided between the pickup circuits and the normal defect compensation apparatus of the player to detect the presence of the external signals and to activate the normal defect compensation apparatus when the external signals are of a relatively high frequency and above a certain amplitude level.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3605018 (1971-09-01), Coviello
patent: 4021852 (1977-05-01), Hurst
patent: 4039959 (1977-08-01), Pattontyus-Abraham
patent: 4189745 (1980-02-01), Ushio
patent: 4203134 (1980-05-01), Christopher
patent: 4238777 (1980-12-01), Okada

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