Electronic Video Recording

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Electronic Video Recording, or EVR, a film-based video recording format developed in the 1960's by CBS Laboratories.

CBS announced EVR in October 1967. The 750-foot film was stored on a seven-inch diameter spool in a plastic cartridge. It used a twin-track 8.75mm film onto which video signals were transferred by electron beam recording, one monochrome track in each direction of travel. As such, it did not store "images" in the literal sense, but rather, a waveform that represented the scanned video.

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 It was, however, quickly superseded by professional and consumer magnetic tape formats.

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