[Freeswitch-users] Better results from mod_vmd

[Abaci B]

Just tested mod_avmd on master and mod_avmd was able to detect the beep of
a Verizon voicemail. Will do more testing and report back.

On Wed, Mar 30, 2016 at 8:39 PM, Michael Jerris <mike at jerris.com> wrote:

> Just in master so far. It will hit 1.6 branch when we do the next release
>
>
> On Wednesday, March 30, 2016, Abaci B <abaci64 at gmail.com> wrote:
>
>> 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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>>
>>
> _________________________________________________________________________
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>
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>
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