Telegraphy – Systems – Printing
Patent
1973-05-10
1976-11-16
Stewart, David L.
Telegraphy
Systems
Printing
179 2TV, 178DIG23, H04J 112
Patent
active
039925897
ABSTRACT:
In a carrier frequency multiplex system for single sideband transmission of telephone channels which have been converted through the transmission position of the transmission band of the system through the utilization of carriers which are whole number multiples of 4 kHz, the transmission of videophone channels which have been converted from the video position to the transmission position with carriers that are chosen such that those video carriers corresponding to the frequency zero in the video position are multiples of 4 kHz in the transmission position.
REFERENCES:
patent: 3046329 (1962-07-01), Reesor
patent: 3073906 (1963-01-01), Lee
Bell System Technical Journal, vol. 13, No. 3, "A Theory of Scanning...," by P. Mertz et al., pp. 464-467.
"Simultaneous Transmission of Multichannel Telephone and Video-Telephone Signal by Analog Multiplex," Kawafune et al., June 1971, 7th International Conference on Communications.
Bell Laboratories Record, "Transmission Across Town or Across the Country," Nast et al., May/June 1969, pp. 165-168.
Philips Technical Review, "A 48-Channel Carrier Telephone System," Bast et al., vol. 9, No. 6, pp. 161-170.
Siemens Aktiengesellschaft
Stewart David L.
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