[Freeswitch-users] start_dtmf false positives

[Brian West]

spandsp_start_dtmf absolutely does NOT use libteletone, where exactly did
you get that idea?

On Tue, Jan 30, 2018 at 4:51 AM, Roman Dissauer <roman at dissauer.net> wrote:

> Hi,
>
> thanks Alexey, but spandsp_start_dtmf uses exactly same libteletone under
> the hood.
>
> Kind Regards,
> Roman
>
> *RDI SOLUTIONS e.U.*
> Rosasgasse 13/24
> 1120 Wien, Österreich
> T: +43 1 3530349 <+43%201%203530349> - 10
> F: +43 1 3530349 <+43%201%203530349> - 99
> roman.dissauer at rdi.at
> *www.rdi.at <http://www.rdi.at>*
>
> Am 30.01.2018 um 00:06 schrieb Alexey Sibyakin <alex at freeswitch.com>:
>
> Have you tried spandsp_start_dtmf? It has its quirks but after some tuning
> It worked for me much better than start_dtmf.
>
> On Tue, Jan 30, 2018 at 1:15 AM, Steve Underwood <coppice12 at gmail.com>
> wrote:
>
>> The false positive rate for the DTMF decoder in spandsp is extremely low.
>> Tests show it has one of the lowest false positive rates in the industry.
>> If you are seeing significant false positives you might actually have some
>> DTMF in the audio. Can you capture some troublesome audio to a file for
>> analysis?
>>
>> Regards,
>>
>> Steve
>> On 01/29/2018 02:35 PM, Roman Dissauer wrote:
>>
>> Hi Guys,
>>
>> we have troubles reliably recognizing DTMF tones by using dialplan
>> application start_dtmf.
>> From our carriers we get some calls with inband DTMF and some with
>> RFC2833. To our customers we need to always do RFC2833. Therefore we check
>> SDP information and enable start_dtmf when RFC2833 is not available on the
>> incoming call. When start_dtmf is executed we have a lot of false positives
>> mostly at the start of audio but also during the call.
>>
>> Is there a way to prevent false DTMF detection? Does anyone have same
>> issues and a solution for it?
>>
>> Kind regards
>> Roman Dissauer
>>
>> *RDI SOLUTIONS e.U.*
>> Rosasgasse 13/24
>> 1120 Wien, Österreich
>> T: +43 1 3530349 <+43%201%203530349> - 10
>> F: +43 1 3530349 <+43%201%203530349> - 99
>> roman.dissauer at rdi.at
>> *www.rdi.at <http://www.rdi.at/>*
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:consulting at freeswitch.orghttp://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Siteshttp://www.freeswitch.orghttp://confluence.freeswitch.orghttp://www.cluecon.com
>>
>> FreeSWITCH-users mailing listFreeSWITCH-users at lists.freeswitch.orghttp://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-usershttp://www.freeswitch.org
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>
>
>
> --
>
> Alex Sibyakin | Support Engineer
> FreeSWITCH Solutions | 17345 Civic Drive #2531 Brookfield, WI 53045
> <https://maps.google.com/?q=17345+Civic+Drive+%232531+Brookfield,+WI+53045&entry=gmail&source=g>
> Email: alex at freeswitch.com
> Website: https://www.FreeSWITCH.com <https://www.freeswitch.com/>
> Need commercial support? Contact sales at freeswitch.com for details.
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>



-- 

Brian West | Co-founder and Developer

Need Commercial support? email sales at freeswitch.com

FreeSWITCH Solutions | 17345 Civic Drive #2531 Brookfield, WI 53045
<https://maps.google.com/?q=17345+Civic+Drive+%232531+Brookfield,+WI+53045&entry=gmail&source=g>

Email: brian at freeswitch.com

Mobile: 918-424-9378

Website: https://www.FreeSWITCH.com <https://www.freeswitch.com/>

[image: color-facebook-96.png] <https://www.facebook.com/freeswitch/>[image:
color-twitter-96.png]
<https://twitter.com/freeswitch?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Eauthor>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20180130/168875d7/attachment.html>