Video Correction
As far back as 1956, professional reel-to-reel audio tape recorders relying on mechanical stability alone had no audible pitch distortion, and no need for time base correction. However, the higher sensitivity of video recordings meant that even the best mechanical solutions still resulted in detectable distortion of the video signals. A video signal consists of picture information but also sync and subcarrier signals which allow the image to be framed up square on the monitor, reproduce colors accurately and, importantly, allow the combination and switching of two or more video signals. Unlike audio, video signals cannot be successfully mixed if they are out of time with each other.
Read more about this topic: Time Base Correction
Famous quotes containing the words video and/or correction:
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