Re: Detecting a beep in a movie file audio track
Re: Detecting a beep in a movie file audio track
- Subject: Re: Detecting a beep in a movie file audio track
- From: Tom Lieber <email@hidden>
- Date: Wed, 24 Nov 2010 12:37:30 -0500
On Tue, Nov 23, 2010 at 3:49 AM, tahome izwah <email@hidden> wrote:
> If that beep consists of a single or multiple tones (such as a DTMF
> signal) a full blown FFT is way to expensive, there are more
> specialized algorithms for detecting this. Try a web search on
> "Goertzel algorithm" it should give you some pointers.
I agree; the algorithm is simple, works, and has one of the better
Wikipedia pages:
http://en.wikipedia.org/wiki/Goertzel_algorithm
--
Tom Lieber
http://AllTom.com/
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