Abstract
In the early 1920's, the digital picture transmission system, so called Bartlane system, was developed, by which picture could be sent over any telegraph lines.
Picture signals from the Bartlane phototelegraph transmitter were translated into digital codes and they were recorded into telegraph-perforated tape, which was applied to an ordinary telegraph transmitter. At the telegraph receiving station, original perforated tape was reproduced. Original picture was reconstructed from this perforated tape as off line mode by using the Bartlane phototelegraph receiver.
The Batrtlane system handled nearly 500 pictures of important news over the Atlantic submarine cable between London and New York until 1939 when the outbreak of war in Europe.
