Newsgroups: comp.multimedia
Path: utzoo!utgpu!tj
From: tj@gpu.utcs.utoronto.ca (Terry Jones)
Subject: Re: Video Toaster and TBC question
Message-ID: <1991Jun4.172727.1889@gpu.utcs.utoronto.ca>
Organization: UTCS Public Access
References: <1991Jun4.133813.14504@mips2.ma30.bull.com>
Distribution: na
Date: Tue, 4 Jun 1991 17:27:27 GMT

The TBC is a Time Base Corrector which makes sure you have very stable
correct synch signals for the video. Tape decks have variations due to
mechanical stuff. The TBC eliminates this.

Genlock allows you to make sure that two or more seperate video signals are
exactly locked in synch. Not only must the signals be the exact same 
frames/second rate, but they must be in "phase" in that they
must start at exactly the same time for each frame so that when you fade from
one to the other, you are fading into a picture that is in the same
"vertical hold" position as the first signal.