search for: mean_post

Jean Marc, I have been fiddling around with preprocess to try to get it sounding less metallic/underwater- so based on some things said recently, I have been first fiddling with mean_post and mean_prior to try to get them to do change the update rate, so that update_noise gets called at the right times. Haven't made it too deep into the code, but I have a few questions in speex_preprocess: Is there a particular reason for choosing .1 as the gamma coefficient (for the posterior...

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

...gt; 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 denoise? > What internally do...