Television receiver having teletext processor with ROM for on-sc

Details Television receiver having teletext processor with ROM for on-sc Television receiver having teletext processor with ROM for on-sc

1985-04-01

1986-12-30

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358147, 358183, H04N 900

Patent

active

046332979

ABSTRACT:
A microprocessor based TV/TTX processor includes a stored pages ROM in the TTX processor for storing on-screen display messages and lists of functions and characteristics as pages of TTX data. An RGB switch is coupled to receive the output of a character generator in the TTX processor and to receive the video output of the TV for selectively displaying information from each source with or without the on-screen messages and lists. The stored pages ROM relieves the microprocessor of the necessity of generating the on-screen messages and lists. Items on the list are controllable by the viewer and an indication of the status of the item is given by the microprocessor changing a character in the display memory of the TTX processor.

REFERENCES:
patent: 4338624 (1982-07-01), d'Hautecourt et al.
patent: 4344090 (1982-08-01), Belisomi et al.
patent: 4459585 (1984-07-01), Pasternak

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