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dm at belkam.com
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 Posted: Thu Mar 19, 2015 12:32 am Post subject: [asterisk-users] how asterisk detects silence? |
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Hello!
As I see there is dsp_drop_silence switch in confbridge.
Could you tell me how asterisk detects silence?
Is it possible to change silence level,
so, let's say some not loud enough background noises will be recognized
as silence
and only loud enough human voice will be recognized as sound?
Thank you!
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dm at belkam.com
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| Posted: Mon Mar 23, 2015 12:26 am Post subject: [asterisk-users] how asterisk detects silence? |
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19.03.2015 09:31, Dmitry Melekhov пишет:
| Quote: | Hello!
As I see there is dsp_drop_silence switch in confbridge.
Could you tell me how asterisk detects silence?
Is it possible to change silence level,
so, let's say some not loud enough background noises will be
recognized as silence
and only loud enough human voice will be recognized as sound?
Thank you!
|
Hello!
Nobody knows? :-(
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_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users |
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mjordan at digium.com
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| Posted: Mon Mar 23, 2015 6:12 am Post subject: [asterisk-users] how asterisk detects silence? |
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On Mon, Mar 23, 2015 at 12:25 AM, Dmitry Melekhov <dm@belkam.com> wrote:
| Quote: | 19.03.2015 09:31, Dmitry Melekhov пишет:
| Quote: |
Hello!
As I see there is dsp_drop_silence switch in confbridge.
Could you tell me how asterisk detects silence?
Is it possible to change silence level,
so, let's say some not loud enough background noises will be recognized as
silence
and only loud enough human voice will be recognized as sound?
Thank you!
|
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Asterisk passes received voice data, converted to signed linear,
through a DSP. The DSP looks at the energy level in the data and, if
it is above a certain value, categorizes the data as 'silence' or
'talking'.
You can tweak the periods necessary for Asterisk to decide if someone
is talking or silent using the 'dsp_silence_threshold' and
'dsp_talking_threshold' settings:
https://wiki.asterisk.org/wiki/display/AST/Asterisk+13+Configuration_app_confbridge
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Matthew Jordan
Digium, Inc. | Director of Technology
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org
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_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users |
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