[Freeswitch-users] Better results from mod_vmd

[Abaci B]

was it merged into 1.6 or just master?

On Wed, Mar 30, 2016 at 11:09 AM, Piotr Gregor <piotrek.gregor at gmail.com>
wrote:

> Hi Abaci,
>
> after FS-8875 was merged yesterday in PR 775
> I have tested avmd on your Verizon voicemail (contains 1000hz beep)
> and on another Voipfone voicemail (contains beep of lower frequency,
> 724.1914 is detected).
> Detection of tone works just fine while not giving many false positives
> in the same time.
> But you should note the avmd module is in beta stage so not everything
> is working as expected yet. In case of Verizon sometimes it gives false
> alarm on silence, this can be handled at this moment by adjusting avmd
> session parameters
>
> AVMD_SAMLPE_TO_SKIP_N  increase
> BEEP_TIME increase
> SAMPLES_CONSECUTIVE_STREAK increase
> VARIANCE_THRESHOLD may need to decrease
>
> or starting avmd after 3 - 4 first ring tones. Regardless of this it will
> be
> treated in more generic way - by adding of estimation of amplitude.
> Related to this is a need for adjusting parameters on a basis of expected
> characteristics of incoming signal, e.g. SNR. And it should be possible
> to be set the settings on a per call basis.
>
> So you may wish to checkout master branch,
> build, test, and let us know the results.
>
> cheers,
> Piotr
>
>
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