[Freeswitch-users] Better results from mod_vmd

[Michael Jerris]

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
> <javascript:_e(%7B%7D,'cvml','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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