Subject: Re: [linux-audio-dev] SMTPE/MTC Again
From: Fons Adriaensen (fons.adriaensen_AT_alcatel.be)
Date: Mon Apr 14 2003 - 15:58:30 EEST
Paul Davis writes:
> SMPTE/MTC has a resolution of (typically) 1/30 second. it therefore
> cannot be used for sample-accurate positioning. this will still ensure
> that everything is in the same place, but it may not be exactly where
> you want them to be.
This problem disappears when you forget about frames and start looking
at it just as an encoded form of time epressed in seconds. Depending
on the signal quality (no problem with today's hardware), you get an
accuracy of better than a microsecond.
The only problem with SMPTE synchro is that you have to accept that
the 'sample time' of your system is irrelevant w.r.t to the
synchronised content you should deliver, and there is apparently
fierce resistance against that idea.
FA
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