Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-03-01
1984-09-11
Cardillo, Jr., Raymond F.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358342, 369126, H04N 576
Patent
active
044713894
ABSTRACT:
A pulse interference detector is disclosed for use in a capacitance electronic disc player (CED). A relatively short-duration, high-amplitude periodic interference pulse, such as a radar pulse, is detected. The video carrier signal of the CED has a first envelope aberration in the form of a relatively long peak-to-peak duration amplitude modulation component, and a second envelope aberration in the form of the interference pulse. The CED incudes a defect corrector for inserting, when triggered, preceding unblemished display line information into a current display line void. The pulse interference detector receives and processes the video carrier signal and also detects the interfering radar pulse. The detector comprises a first signal path responsive only to the amplitude modulation component, and includes a resistor-capacitor network for producing a reference component substantially representing an average of the envelope excursion of the component. A second signal path is responsive only to the interference signal, and includes a transistor for triggering the defect corrector upon occurence of the interference pulse. A threshold of triggering response is established outside the maximum excursion of the envelope formed by the amplitude modulation component of the video carrier signal.
REFERENCES:
patent: 4327431 (1982-04-01), Dieterich et al.
patent: 4327432 (1982-04-01), Lang et al.
patent: 4361881 (1982-11-01), Clemens
patent: 4364119 (1982-12-01), Gibson
patent: 4385374 (1983-05-01), Kelleher
Schematic Diagram, Prior Art, RCA Company Private Restricted Data; Dwg. No. 2843022, Pulse Interference Corrector.
SFT100 Player Technical Manual, RCA Corporation; Selected Tutorial pp. 9, 10, 11, 12, 13, 14; 29, 30, 31, 32; 39, 40, 43, 44, 45, 46, 47, 48.
Cardillo, Jr. Raymond F.
O'Connor Cornelius J.
Zenith Electronics Corporation
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