Re: [Iaxclient-devel] Silence Threshold values and meanings

[Mihai B. <mi...@ha...>]

On Jan 16, 2008, at 5:03 AM, Marco Bn=E0 wrote:
> I=92ve got acouple of questions about silence threshold value. What =20=

> is the scale of values and, more important,  what are values =20
> respective meanings?
>
The silence threshold parameter controls the way iaxclient behaves =20
when dealing with silence or low volume input.
Any positive value means that the decision wether the incoming sound =20
is silence or not is left to the speex preprocessor.
0.0f will mark all incoming frames as silence, even though they might =20=

contain voice
A negative value sets the decibel level below which the incoming =20
sound is considered silent. A value of -99 for example, will mark all =20=

incoming frames as active voice, even though some of them might be =20
silent.

This is relevant because normally, iaxclient will stop transmitting =20
silent frames in order to save bandwidth.

The relevant code can be found in audio_encode.c, in input_postprocess=20=

() and audio_send_encoded_audio().

Mihai