论文信息 - A New Telephotograph System

A New Telephotograph System

Transmission of photographs over telephone wires was begun commercially several years ago, but recent improvements have increased to 11 by 17 inches the size of photograph that could be transmitted and have made it possible for the picture to give much more information. The new machines used for sending and receiving photographs are described in this paper, and the requirements and control of the wire system necessary to prevent imperfections in the picture and to permit switching of sending and receiving stations are discussed.

F. W. Reynolds

[1] H. M. Stoller,et al. Synchronization af Television , 1927, Transactions of the American Institute of Electrical Engineers.

[2] H. S. Osborne,et al. Long distance telephone circuits in cable , 1932 .

[3] W. A. Marrison,et al. Frequency Measurement in Electrical Communication , 1923, Transactions of the American Institute of Electrical Engineers.

[4] Sallie Pero Mead. Phase distortion and phase distortion correction , 1928 .

[5] H. M. Stoller,et al. Synchronization of television , 1927 .

[6] W.A. Marrison. Thermostat Design for Frequency Standards , 1928, Proceedings of the Institute of Radio Engineers.

[7] J. W. Horton,et al. The transmission of pictures over telephone lines , 1925 .

[8] A. M. Curtis. An oscillograph for ten thousand cycles , 1933 .

[9] W H Eccles. The Use of the Triode Valve in Maintaining the Vibration of a Tuning Fork , 1918 .

[10] Harry Nyquist. Certain Topics in Telegraph Transmission Theory , 1928 .

[11] P. Mertz,et al. A theory of scanning and its relation to the characteristics of the transmitted signal in telephotography and television , 1934 .

[12] W. A. Marrison,et al. Precision Determination of Frequency , 1928, Proceedings of the Institute of Radio Engineers.

[13] H. M. Stoller. Synchronization system for two-way television , 1930 .

[14] E. I. Green. The Transmission Characteristics of Open-Wire Telephone Lines , 1930, Transactions of the American Institute of Electrical Engineers.