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Posted by Roderick Stewart on 12/05/06 18:07
On 5 Dec 2006 06:34:00 -0800, "blackburst@aol.com"
<blackburst@aol.com> wrote:
>
>Video/Audio synch has long been a problem. In the beginning, analog
>"live shots" were sent back to the studio via microwave, where the
>video and audio then took different "paths". The video went through a
>frame synchronizer: Early units imparted 2-4 frames of delay, but that
>was eventually reduced to under a frame.
That was nowhere near the "beginning". In the beginning, the sync
pulse generator at the location may or may not have been slave locked
to base, or base may have taken the feed as a non-synchronous source,
but video and audio would have gone straight through the whole system
without passing through any equipment that was even capable of
introducing any noticeable delay, because such equipment didn't exist.
People had to be trained in the use of sync pulse generators and
genlock systems, but most of the time it worked, and bad lip-sync was
something that only ever applied to film.
Rod.
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