An Experimental Visual Communication System
F. K. Becker, J. R. Hefele, William T. Wintringham · Bell System Technical Journal · 1959
Substantial technical and economic benefits are obtainable by fitting a visual communication system to a specific application. Some of the considerations involved in such adaptation are discussed in this paper. An experimental system to demonstrate the specific adaptation to the problem of signature verification in a savings bank is described. It is shown that satisfactory images can be transmitted over a 5-kilocycle sound program circuit in 5 seconds. This result is obtained by reducing both the area scanned by the transmitter and the resolution of the reproduction to the minimum required for this application.