Automatic time alignment by signal analysis

[Nicolas Bouillot]

could be of interest:
http://www.eecs.qmul.ac.uk/~simond/match/index.html

Nicolas

On Wed, 2011-04-20 at 13:52 -0400, Benjamin M. Schwartz wrote:
> On 04/20/2011 01:08 PM, Sean McNamara wrote:
> > It may not be what you're looking for (no integration with Gstreamer),
> > but PulseAudio has code in "module-combine" to:
> > 
> > 1. Combine two separate sinks into one virtual sink. Example: two sound cards.
> > 2. Dynamically calculate the timing deviation, on the fly, and adapt
> > to keep the two sinks in sync by resampling one of them
> > 3. Do software mixing on the two streams to combine them into one
> > stream that then becomes the output stream of the virtual sink.
> 
> That's very interesting, but also very different from my application.
> PulseAudio is determining clock skew by counting the samples processed by
> each device and watching that one of them processes faster than the other.
> 
> I am trying to combine two independent recordings after recording is
> complete, and the two recordings may have started and stopped at
> substantially different times.  To determine the correct alignment, the
> program must compare the contents of the two signals.
> 
> --Ben
> 
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