Color Electronic Video Recording

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Electronic Video Recording® (EVR), a system whereby prerecorded audio-video programs may be played through standard television receivers, is described in detail. Color and monochrome media are compatible on EVR, that is, a color EVR cartridge can be played on a monochrome EVR player and a monochrome cartridge will yield a black-and-white image on a color receiver. Recorded programs are stored in EVR cartridges, measuring 7 inches in diameter, 0.5 inches thick, with a large center hole. The cartridge contains 25 minutes (750 feet) of color video signal using two video tracks, one for luminance information and the other for color. Monochrome programs use only one track at a time, hence the duration would be 50 minutes maximum. The video signal is exposed onto a photographic base (8.75 mm wide and 3-mil thick). The audio signal is recorded on two narrow magnetic stripes on each side of the EVR film. A special high-resolution silver halide film provides an essential interface between the electron beam recording, printing, and playback processes. The electron beam recorder (EBR) consists of three sections, all under vacuum, plus their requisite circuitry: the film magazine, the film transport, and the electron gun. The master film is recorded by direct electronography. With each pass of the master film, the wet-gate multiple-head EVR printer produces 16 color programs together with magnetic soundtracks. Film processing is accomplished in black-and-white continuous film developing machines, with special attention given to uniformity of processing and control of granularity. Diazo film has been investigated and found experimentally suitable for EVR duplication printing. A lead from the EVR player is easily attached by handclips to the external antenna terminals of the television set. Then the film cartridge is placed on the player, the television set turned on to a channel that is not broadcasting, and the player starter button pushed.
Publication Date: 1970-08-01
DOI: 10.5594/J00884
Link: https://doi.org/10.5594/J00884
Author(s): Peter C. Goldmark

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Peter C. Goldmark; Color Electronic Video Recording, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J00884

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Peter C. Goldmark; Color Electronic Video Recording, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J00884

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Peter C. Goldmark; Color Electronic Video Recording, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970. Available at https://doi.org/10.5594/J00884

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<span class="citation">Peter C. Goldmark; <cite>Color Electronic Video Recording</cite>, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970. Available at <a href="https://doi.org/10.5594/J00884" target="_blank" rel="noopener">https://doi.org/10.5594/J00884</a></span>

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Peter C. Goldmark; Color Electronic Video Recording, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970
doi: 10.5594/J00884
url: https://doi.org/10.5594/J00884

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<li>
Peter C. Goldmark; <cite id="bib-10-5594-j00884">Color Electronic Video Recording</cite>, Journal of the SMPTE ( Volume: 79, Issue: 8, August 1970); SMPTE, 1970
<span class="doi">10.5594/J00884</span>
</li>