Hey Ilian,

Thanks for exposing these methods in ATLSIP!

Has there been any more work on the adaptive Silence Detection? The
threshold of 3 is pretty stable, but I have end-users who complain that all
calls are extremely ''one-sided'' meaning that once one side of the call
begins talking, the other person can''t easily interrupt them. Logically that
makes sense, but the end users I have love to interrupt each other so its
rather annoying for them to wait till the other person is finished.

Has anyone else deployed ATLSIP to real world end users?

If so, what has your experience been like? I''d love to see what kind of
settings (Silence, CN etc) others are using in the field.

Regards,
Whit

-----Original Message-----
From: opensipstack-devel-bounces at lists dot sourceforge dot net
[mailto:opensipstack-devel-bounces at lists dot sourceforge dot net] On Behalf Of Ilian
Jeri C. Pinzon
Sent: Friday, June 29, 2007 6:58 AM
To: opensipstack-devel at lists dot sourceforge dot net
Subject: Re: [OpenSIPStack] Problem with OnOutgoingCallConnected

The attachment was not sent. Probably filtered by the server. Anyway, here
it is:

===========================================================================

Hi all,

I have exposed the setting of silence detection mode and audio jitter
delay in ATLSIP and SoftPhoneInterface.

Here are the methods:

DisableSilenceDetection()

• Disables silence detection. Disables CNG as well.

EnableFixedSilenceDetection( ULONG threshold )

• Enables fixed silence detection. Any sound level below the threshold

is treated as silence (and CN is generated as a result). Don''t use too
high threshold values or you''ll only hear comfort noise. Try threshold=3
as suggested by Whit in another thread.

EnableFixedSilenceDetectionEx( ULONG threshold , ULONG signalDeadband,
ULONG silenceDeadband )

• An extended version of the previous method. Don''t tinker with this

unless you know what you''re doing. For reference on how signalDeadband
and silenceDeadband are used, look in OpalSilenceDetector::ReceivedPacket().

EnableAdaptiveSilenceDetection( ULONG adaptivePeriod )

• Enables an adaptive silence detection. Supposedly this enables the

threshold to adapt to the current sound level every adaptivePeriod
milliseconds. However, its silence detection doesn''t seem to be very
effective (at least in my machine). I''ll look into this further to see
what''s wrong. This mode with adaptivePeriod=4800 is the default mode for
ATLSIP.

EnableAdaptiveSilenceDetectionEx( ULONG adaptivePeriod, ULONG
signalDeadband, ULONG silenceDeadband )

• An extended version of the previous method. Don''t tinker with this

unless you know what you''re doing. For reference on how signalDeadband
and silenceDeadband are used, look in OpalSilenceDetector::ReceivedPacket().

SetAudioJitterDelay( ULONG minDelay, ULONG maxDelay )

• Sets audio jitter delay settings.

Regards,
Ilian

Ilian Jeri C. Pinzon wrote:

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Just tested this a while ago. This does not happen in my build.

Have you eliminated the possibility that this is caused by your mic?
I''ve used a mic with no noise-canceling features before and when I
throttled the mic''s volume, it became sensitive to noise. Thus a lower
voice quality.

Btw, how are you setting the volume?

• Ilian

tomach wrote: