Electronic Video Recording
Encyclopedia
Electronic Video Recording, or EVR, was a film-based video recording format developed by Hungarian-born engineer Peter Carl Goldmark
at CBS Laboratories
in the 1960s.
CBS
announced EVR in October 1967. The 750-foot film was stored on a 7 inches (177.8 mm) spool in a plastic cartridge. It used a twin-track 8.75 mm film onto which video signals were transferred by electron beam recording, one monochrome track in each direction of travel.
Some EVR films had a separate chroma track in place of the opposite-direction monochrome track for color EVR films. The images stored on an EVR film were visible frames much like motion picture film, and were read by a flying spot scanner
inside an EVR player to be converted to a video signal to be sent to a television set.
EVR was also released by CBS as a professional version for television broadcasting, called BEVR (Broadcast EVR). As a professional medium, the format offered extremely high quality. It was, however, quickly superseded by professional and consumer magnetic tape formats.
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Peter Carl Goldmark
Peter Carl Goldmark was a German-Hungarian engineer who, during his time with Columbia Records, was instrumental in developing the long-playing microgroove 33-1/3 rpm vinyl phonograph disc, the standard for incorporating multiple or lengthy recorded works on a single disc for two generations...
at CBS Laboratories
CBS Laboratories
CBS Laboratories or CBS Labs was the technology research and development organization of CBS...
in the 1960s.
CBS
CBS
CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...
announced EVR in October 1967. The 750-foot film was stored on a 7 inches (177.8 mm) spool in a plastic cartridge. It used a twin-track 8.75 mm film onto which video signals were transferred by electron beam recording, one monochrome track in each direction of travel.
Some EVR films had a separate chroma track in place of the opposite-direction monochrome track for color EVR films. The images stored on an EVR film were visible frames much like motion picture film, and were read by a flying spot scanner
Flying spot scanner
A flying-spot scanner uses a scanning source of a spot of light, such as a high-resolution, high-light-output, low-persistence Cathode Ray Tube , to scan an image, usually from motion picture film or a slide...
inside an EVR player to be converted to a video signal to be sent to a television set.
EVR was also released by CBS as a professional version for television broadcasting, called BEVR (Broadcast EVR). As a professional medium, the format offered extremely high quality. It was, however, quickly superseded by professional and consumer magnetic tape formats.
External links
- The quest for home video: EVR
- LabGuy's World page on EVR
- Photos of EVR
- EVR page on Total Rewind - the Virtual Museum of Vintage VCRs
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