On Mon, Mar 23, 2015 at 12:25 AM, Dmitry Melekhov <d...@belkam.com> wrote: > 19.03.2015 09:31, Dmitry Melekhov пишет: >> >> 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! >>
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 -- 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 -- _____________________________________________________________________ -- 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
