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Electronic Video Recording

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Title: Electronic Video Recording  
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Subject: CBS Laboratories, HD NVD, Laserfilm, EIAJ-1, DCT (videocassette format)
Publisher: World Heritage Encyclopedia

Electronic Video Recording

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-inch-diameter (180 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 It was, however, quickly superseded by professional and consumer magnetic tape formats.

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
  • Demonstration film of EVR (circa 1969)

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