1984-05-08
1986-07-15
George, Keith E.
H04M 1100
Patent
active
046008080
ABSTRACT:
The apparatus comprises a dot printer (24) and a control unit for the printer connected to the line in parallel with a video display, the control unit is capable of processing the data received and storing it temporarily in a page memory in transcoded form in such a way as to associate with each character the relative print attributes and to be able directly to address a character generator. The control unit is capable of taking the transcoded data from the page memory for controlling the printer. The character generator comprises a portion for the alphanumeric characters, a portion for semigraphic characters and a portion for decoding colors with a corresponding grey value. The semigraphic characters are produced on a matrix of 10.times.12 dots in such a way that, for each grey value, the horizontal and vertical distance of the character dots of the same color remains constant.
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patent: 4328557 (1982-05-01), Gastinel
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patent: 4412304 (1983-10-01), Yamakita
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R. E. F. Bugg, "Microprocessor Peripheral for Viewdata", Electronic Technology, vol. 15, Jul./Aug. 1981, pp. 125-128.
T. Tomita, "Introducing the Captain System", Proceedings of the Pacific Telecommunications Conference, Honolulu, Hi., USA, 8-9 Jan. 1979, pp. 4A15-4A23.
Watanabe et al, "Captain System-Videotex-", National Technical Report (Japan), vol. 27, No. 4, Aug. 1981, pp. 506-528.
Cosentino Giuseppe
Provera Franco
George Keith E.
Ing. C. Olivetti & C. S.p.A.
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