Multiplexing arrangement for a television signal processing syst

Details Multiplexing arrangement for a television signal processing syst Multiplexing arrangement for a television signal processing syst

1979-02-26

1980-10-07

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

340802, 340814, H04N 550

Patent

active

042272173

ABSTRACT:
A channel number display arrangement for a television receiver includes a multiplexer for alternately coupling binary signals representing the tens and units digits of the channel number of a selected channel to a single decoder and driver arrangement. To reduce visible effects of switching transients, the switching operation of the multiplexer is synchronized with respect to the receiver's deflection signals so that switching transients occur during horizontal retrace intervals in which the receiver's electron beams are normally blanked. In addition, keyed AGC circuitry, normally activated during the horizontal retrace intervals, is inhibited during the switching operation so that it is not erroneously set up in response to switching transients.

REFERENCES:
patent: 3968443 (1976-07-01), Leuschner
patent: 4005369 (1977-01-01), Parisoe
patent: 4005404 (1977-01-01), Soobik
patent: 4020484 (1977-04-01), Caspari
patent: 4081797 (1978-03-01), Olson
patent: 4123713 (1978-10-01), Wine
patent: 4151559 (1979-04-01), Merrill
patent: 4156254 (1979-05-01), Marino
"Magnavox Service Manual No. 7353", 703777 Videomatic Touch-Tune, Magnavox Company, 9-1976.

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