Audio clipping in mod_conference
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
Is it only conference related or may it affect other apps? Hynek 2011/11/3 Roland Hänel <roland@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
Without exact knowledge, I would guess this is conference-specific, since in normal one-to-one conversations, there is no such thing as energy-level detection and audio mixing. If you consider VAD (voice activity detection) performed by SIP endpoints (aka phones), this is a similar thing but in this particular case, I have verified that VAD is not an issue. Roland 2011/11/3 Hynek Cihlar <hynek.cihlar@gmail.com>
Is it only conference related or may it affect other apps?
Hynek
2011/11/3 Roland Hänel <roland@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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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@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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
Anthony, The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem. It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right? Greetings, Roland 2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
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-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Gruß, Roland
it's not, most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input. 2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
Yes, I am on a current GIT (about 2 weeks old), and I have waste-bandwidth for every subscriber, and a packet capture confirms that FS sends RTP permanently. So jitter buffers shouldn't be an issue here. Even *if* jitter buffers would be recharging, that would only lead to a small delay, but not to audio being clipped (i.e., lost), right? My packet traces show that there are different ptime's involved (FreeSwitch is on 20ms by default, some phones have 30ms). Could that contribute to the issue? Roland 2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
well waste bandwidth became obsolete on oct 4th You could test your theory by using a 30ms/20ms phone instead. You should really remove variables until you come up with something. Basically the default FS conf on sip:888@conference.freeswitch.org is running the default params with 200 as default energy. So call that first and see if you get the same issue because we have 30+ people call there every wednesday without incident and we literally spend like 12 hours a day on the same server for private development. Then setup a vanilla out of the box FS build and try exten 3000 The conference. and see if you get your problem, try other phones etc. look at all the variables to see what you may be doing differently than most people who do not experience your issue. 2011/11/3 Roland Hänel <roland@haenel.me>
Yes, I am on a current GIT (about 2 weeks old), and I have waste-bandwidth for every subscriber, and a packet capture confirms that FS sends RTP permanently. So jitter buffers shouldn't be an issue here.
Even *if* jitter buffers would be recharging, that would only lead to a small delay, but not to audio being clipped (i.e., lost), right?
My packet traces show that there are different ptime's involved (FreeSwitch is on 20ms by default, some phones have 30ms). Could that contribute to the issue?
Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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 > > > > FreeSWITCH-users mailing list > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org > >
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
I will have to check that out, although I am pretty sure I did test, but that was when I first started. Anthony Minessale <anthony.minessale@gmail.com> wrote:
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
---------------------------------------------------- Alternatives:
----------------------------------------------------
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici covici@ccs.covici.com
well you call 888 every week and its the same software =p On Thu, Nov 3, 2011 at 5:08 PM, <covici@ccs.covici.com> wrote:
I will have to check that out, although I am pretty sure I did test, but that was when I first started.
Anthony Minessale <anthony.minessale@gmail.com> wrote:
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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 > > > > FreeSWITCH-users mailing list > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org > >
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
---------------------------------------------------- Alternatives:
----------------------------------------------------
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Your life is like a penny. You're going to lose it. The question is: How do you spend it?
John Covici covici@ccs.covici.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
Does auto-record make a difference -- I know you don't use that feature? Anthony Minessale <anthony.minessale@gmail.com> wrote:
well you call 888 every week and its the same software =p
On Thu, Nov 3, 2011 at 5:08 PM, <covici@ccs.covici.com> wrote:
I will have to check that out, although I am pretty sure I did test, but that was when I first started.
Anthony Minessale <anthony.minessale@gmail.com> wrote:
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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 >> >> >> >> FreeSWITCH-users mailing list >> FreeSWITCH-users@lists.freeswitch.org >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >> UNSUBSCRIBE: >> http://lists.freeswitch.org/mailman/options/freeswitch-users >> http://www.freeswitch.org >> >> > > > -- > Anthony Minessale II > > FreeSWITCH http://www.freeswitch.org/ > ClueCon http://www.cluecon.com/ > Twitter: http://twitter.com/FreeSWITCH_wire > > AIM: anthm > MSN:anthony_minessale@hotmail.com > GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com > IRC: irc.freenode.net #freeswitch > > FreeSWITCH Developer Conference > sip:888@conference.freeswitch.org > googletalk:conf+888@conference.freeswitch.org > pstn:+19193869900 > > > FreeSWITCH-users mailing list > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org > >
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Gruß, Roland
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
---------------------------------------------------- Alternatives:
----------------------------------------------------
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Your life is like a penny. You're going to lose it. The question is: How do you spend it?
John Covici covici@ccs.covici.com
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-- Anthony Minessale II
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-- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici covici@ccs.covici.com
In my case if I set the energy level to > 0, people can hear each other fine, but there is clipping on the recording. covici@ccs.covici.com wrote:
Does auto-record make a difference -- I know you don't use that feature?
Anthony Minessale <anthony.minessale@gmail.com> wrote:
well you call 888 every week and its the same software =p
On Thu, Nov 3, 2011 at 5:08 PM, <covici@ccs.covici.com> wrote:
I will have to check that out, although I am pretty sure I did test, but that was when I first started.
Anthony Minessale <anthony.minessale@gmail.com> wrote:
it's not,
most likely you have a jitterbuffer on your phone that is recharging when you start talking. are you on the latest GIT where we have the waste bandwidth flag on permanently for all callers? To avoid problems like this conferences now always send rtp to people even when they are not getting any useful input.
2011/11/3 Roland Hänel <roland@haenel.me>
Anthony,
The problem is not that audio is clipped because its "too silent", so adjusting the value seems to be the wrong handle for this problem.
It seems that the time needed to make the decision (regardless of the energy threshold value) is the core of the issue, i.e. the level may bei 100, 200 or 300, it takes some XX ms to detect talking and all audio that happens before the detection gets lost. Right?
Greetings, Roland
2011/11/3 Anthony Minessale <anthony.minessale@gmail.com>
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@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@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@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 >>> >>> >>> >>> FreeSWITCH-users mailing list >>> FreeSWITCH-users@lists.freeswitch.org >>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >>> UNSUBSCRIBE: >>> http://lists.freeswitch.org/mailman/options/freeswitch-users >>> http://www.freeswitch.org >>> >>> >> >> >> -- >> Anthony Minessale II >> >> FreeSWITCH http://www.freeswitch.org/ >> ClueCon http://www.cluecon.com/ >> Twitter: http://twitter.com/FreeSWITCH_wire >> >> AIM: anthm >> MSN:anthony_minessale@hotmail.com >> GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com >> IRC: irc.freenode.net #freeswitch >> >> FreeSWITCH Developer Conference >> sip:888@conference.freeswitch.org >> googletalk:conf+888@conference.freeswitch.org >> pstn:+19193869900 >> >> >> FreeSWITCH-users mailing list >> FreeSWITCH-users@lists.freeswitch.org >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users >> UNSUBSCRIBE: >> http://lists.freeswitch.org/mailman/options/freeswitch-users >> http://www.freeswitch.org >> >> > > FreeSWITCH-users mailing list > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org > >
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Your life is like a penny. You're going to lose it. The question is: How do you spend it?
John Covici covici@ccs.covici.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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-- Your life is like a penny. You're going to lose it. The question is: How do you spend it?
John Covici covici@ccs.covici.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici covici@ccs.covici.com
I found that 0 was the only thing that prevented the clipping -- particularly on the recording. Anthony Minessale <anthony.minessale@gmail.com> wrote:
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@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
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire
AIM: anthm MSN:anthony_minessale@hotmail.com GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference sip:888@conference.freeswitch.org googletalk:conf+888@conference.freeswitch.org pstn:+19193869900
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FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici covici@ccs.covici.com
participants (4)
-
Anthony Minessale
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covici＠ccs.covici.com
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Hynek Cihlar
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Roland Hänel