Genlock meaning

(GENerator LOCKing) Synchronizing multiple video signals from cameras, video recorders and external sources. Genlock emits a signal for each frame, and professional video equipment has a dedicated sync port for this function. A frame's timecode is also used for synchronization; however, the clocks in each device may not be 100% precise, and recordings can drift.
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(television) A technique whereby the video output of one source, or a specific reference signal, is used to synchronize other sources.
noun
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To synchronize in this manner.
verb
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Origin of genlock