Bartlane cable picture transmission system
Encyclopedia
Bartlane cable picture transmission system was a technique invented in 1920 to transmit image
s over cable lines. It was named after its inventors Harry G. Bartholomew and Maynard D. McFarlane and was first used to transmit a picture across the Atlantic in 1921. Using the Bartlane system, images could be transmitted across the Atlantic
in less than three hours. The images were initially coded with 5 gray levels, but this number was increased to 15 in 1929. At the transmission end, the pattern on the telegraph tapes were made using special printing devices and decoded into the image at the receiving end using telegraph printers equipped with appropriate typeface
s.
This system was also adapted with a photographic process in order to get more precise images in 1929, so on the receiving end the images was converted to a chemical medium.
Image
An image is an artifact, for example a two-dimensional picture, that has a similar appearance to some subject—usually a physical object or a person.-Characteristics:...
s over cable lines. It was named after its inventors Harry G. Bartholomew and Maynard D. McFarlane and was first used to transmit a picture across the Atlantic in 1921. Using the Bartlane system, images could be transmitted across the Atlantic
Transatlantic telegraph cable
The transatlantic telegraph cable was the first cable used for telegraph communications laid across the floor of the Atlantic Ocean. It crossed from , Foilhommerum Bay, Valentia Island, in western Ireland to Heart's Content in eastern Newfoundland. The transatlantic cable connected North America...
in less than three hours. The images were initially coded with 5 gray levels, but this number was increased to 15 in 1929. At the transmission end, the pattern on the telegraph tapes were made using special printing devices and decoded into the image at the receiving end using telegraph printers equipped with appropriate typeface
Typeface
In typography, a typeface is the artistic representation or interpretation of characters; it is the way the type looks. Each type is designed and there are thousands of different typefaces in existence, with new ones being developed constantly....
s.
This system was also adapted with a photographic process in order to get more precise images in 1929, so on the receiving end the images was converted to a chemical medium.