[speex-dev] DTX in speech
Jean-Marc.Valin at USherbrooke.ca
Wed Dec 10 13:55:57 PST 2003
> I am trying to use the DTX feature of speex to tell if the user is
> speaking. I have VBR, DTX and VAD turned on, but the function
> speex_encode always returns a non-zero value. It is my understanding
> that it should return a zero value when the encoder detects silence?
> Could anyone give me any clues to help figure out why this isn't working
> for me? I am using the 1.13 version of speex on x86 (windows) platform.
Off the top of my head here are a couple things to check:
1) Try with 1.0.3 and see if it makes a difference (1.1.3 is
2) Try feeding it silence (pure zeros) and see if DTX triggers
3) You may want to use the 1.1.x preprocessor which has a better (but
Jean-Marc Valin, M.Sc.A., ing. jr.
Université de Sherbrooke, Québec, Canada
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 190 bytes
Desc: Ceci est une partie de message numériquement signée.
Url : http://lists.xiph.org/pipermail/speex-dev/attachments/20031210/fc739783/signature-0001.pgp
More information about the Speex-dev