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SMPTE timecode
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==History== There were several iterations of timecode in the late 1960s (EECO, DaVinci, Seimens, etc.). The version adopted by SMPTE was developed by Leo O'Donnell while he was working for the National Film Board of Canada. Leo's version referenced time of day and used an 80-bit word that was derived from rocket telemetry. There were several patents issued on Leoβs version (US3877799, for example). Since that time, several changes have been made by SMPTE to keep up with technology.
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