[Freeswitch-users] Audio clipping in mod_conference

[Anthony Minessale]

The setting is an arbitrary number of the energy score required to count as
talking.


check your environments, its very specific to the surroundings.
We run it at 200 in the main FS conf and its rarely an issue.




2011/11/3 Roland Hänel <roland at haenel.me>

> Setting it to 10 or so doesn't help, it seems that just the threshold of
> detection is changed (ok, that's what is expected), not the time until the
> decision is made.
>
> The audio clipping is a timing issue.
> Does there exist something like a "minimum time" that this algorithm needs
> to detect talking after silence? What happens to the audio that was sent by
> that member during this time, does.the algorithm discard that?
>
> Greetings,
> Roland
> Am 03.11.2011 18:20 schrieb "Anthony Minessale" <
> anthony.minessale at gmail.com>:
>
> yes? set it to something between what it was and 0 ?
>>
>>  <param name="energy-level" value="300"/>
>>
>> try 200 100 50 ?
>>
>> 2011/11/3 Roland Hänel <roland at haenel.me>
>>
>>> Hi,
>>>
>>> During thorough testing of our conference solution which is based on
>>> FreeSwitch / mod_conference, we noticed some 'audio clipping' during the
>>> conference. Typically, if a conference member didn't have audio for some
>>> time and then begins to speak, the first syllable will be clipped and
>>> cannot be heard by the other conference participants.
>>>
>>> We ruled out a number of possible causes, and finally discovered that
>>> the energy level detection algorith seems to be the source of the problem.
>>> Setting the energy level for all participants to "0" heals the problem (of
>>> course now the noise might be higher since every participant's noise
>>> contributes to the total noise), but this setting is not very useful since
>>> the "talking detection" seems to rely on the same level, i.e. with energy
>>> "0", all members are marked talking all the time (which effectively renders
>>> the "talking" display useless).
>>>
>>> Is there any chance to tune the energy level detection time (!), or to
>>> de-couple talking detection an energy level detection in FreeSwitch?
>>>
>>> Best regards,
>>> Roland
>>>
>>>
>>>
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>>>
>>
>>
>> --
>> Anthony Minessale II
>>
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-- 
Anthony Minessale II

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