Displaying 3 results from an estimated 3 matches for "mean_prior".
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2005 Oct 25
1
audio preprocess questions
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 posteriori SNR)? It see...
2005 Mar 08
1
VAD with speex_preprocess()
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
2005 Mar 08
0
VAD with speex_preprocess()
...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 denoise?
> What in...