NTSC receiver useable with Teletext/Viewdata information

Details NTSC receiver useable with Teletext/Viewdata information NTSC receiver useable with Teletext/Viewdata information

1979-01-11

1980-11-11

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358180, 358142, 358 85, 315395, H04N 708, H04N 322

Patent

active

042336287

ABSTRACT:
A Teletext equipped NTSC television receiver system includes means for compressing the raster in the vertical direction in response to 625-line formatted Teletext signals to display normally overscanned horizontal lines on the television viewing screen. Thus 625-line formatted Teletext material may be used directly with NTSC receivers.

REFERENCES:
patent: 4161728 (1979-07-01), Insam
Ciciora et al., "An Introduction to Teletext and Viewdata with Comments on Compatability", IEEE Transaction on Consumer Electronics, vol. CE-25, No. 3, Jul. 1979, pp. 235-245.
Daniels, "Wireless World Teletext Decoder", Wireless World, vol. 81, No. 1480, pp. 563-566, Dec. 1975.
Kiver, Television Simplified, l7th Edition, 1973, Van Nostrand Reinhold Company, pp. 346-347.

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