search for: speex_compute_vad

speex_preprocess() isn't covered in the manual, is it? But, it's very easy to use. If it returns non-zero, voice was detected. Tom "Meir Yeshurun" <mt_yeshurun@hotmail.com> wrote: > > I would like to use speex_preprocess() for voice activity detection. I read > the comments in speex_preprocess.h and the relevant paragraphs in the Speex > manual. Is there

...not called unless AGC or denoise is > enabled. > If only VAD is enabled, it does not get called. > > speex_preprocess() has vad_enabled specific code to detect voice activity. > speex_preprocess() > { > ... > ... > if (st->vad_enabled) > is_speech = speex_compute_vad(st, ps, mean_prior, mean_post); > > ... > ... > return is_speech; > } > > Some questions for the knowledgable: > Is speex_preprocess() needed to use vad? > > Can speex_preprocess() be used to detect silent frames if vad is enabled, > but not agc or de...

...e new version. Ive been testing, and discover that with my noisy microphone and me in silence, it returns that there is voice activity, and when i activate mic boost in my sound card (more noise) it returns no voice activity!!! :-S In both cases, the denoise filter works fine. I've seen in speex_compute_vad() source that there are only one change from last version in line 395. I remember that it was a bug reported in this list, are you sure the change is correct? or is the error in other place of speex_preprocess()? thank you by MJM.

Sorry. I forgotten the words volume or loudness. But it is know as microphone stroke too, i think. If something can tell me something about that procedure it would complete my pleasure. To bring back memories, i only wanted to know wheather i can change a variable that holds the sound intensity (loudness) needet to start "encoding >> sending" if the speex codec is in voice