Institutional audio-visual system including a plural operating m

Details Institutional audio-visual system including a plural operating m Institutional audio-visual system including a plural operating m

1980-07-02

1982-03-09

Britton, Howard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, 358189, H04N 568

Patent

active

043192777

ABSTRACT:
An institutional television system includes a source of standard broadcast composite television signals, an auxiliary source of RF carrier signals conveying sound information exclusive of video information, and a television receiver. The television receiver selectably processes the composite television signal including the sync component thereof in a normal mode, and selectably processes the auxiliary signals in an audio mode. The receiver comprises a video signal processing channel that is similarly energized in both the normal and audio modes. The video channel is controlled to enable light output from the kinescope of the receiver when the video sync component is present in the normal mode, and to inhibit light output from the kinescope when the video sync component is absent in the audio mode.

REFERENCES:
patent: 4021849 (1977-05-01), Wheeler
patent: 4038681 (1977-07-01), Harwood
patent: 4051518 (1977-09-01), Sendelweck
patent: 4197557 (1980-04-01), Tuma et al.
patent: 4263610 (1981-04-01), Shanley et al.
RCA Television Service Data Bulletin No. 1978, Cl-1, for Hotel/Motel Series CT-88.
RCA Service Data Bulletin No. 1978, C-5, for CTC-88 Chassis.

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