Hi, In a quick check I recognized that spandsp_start_dtmf and start_dtmf use same function pointer dtmf_session_function. Seems I didn’t dig deep enough, just found out that spandsp_start_dtmf uses different algorithm. Thanks for the hint Brian! I’ll try out spandsp_start_dtmf and report back if issues are gone. Kind Regards, Roman
Am 30.01.2018 um 13:08 schrieb Brian West <brian@freeswitch.com>:
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@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 - 10 F: +43 1 3530349 - 99 roman.dissauer@rdi.at www.rdi.at
Am 30.01.2018 um 00:06 schrieb Alexey Sibyakin <alex@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@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 - 10 F: +43 1 3530349 - 99 roman.dissauer@rdi.at www.rdi.at
____________________________________________________________ _____________ Professional FreeSWITCH Consulting Services:
consulting@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@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@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@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 Email: alex@freeswitch.com Website: https://www.FreeSWITCH.com Need commercial support? Contact sales@freeswitch.com for details. _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@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@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@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@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@freeswitch.com FreeSWITCH Solutions | 17345 Civic Drive #2531 Brookfield, WI 53045 Email: brian@freeswitch.com Mobile: 918-424-9378 Website: https://www.FreeSWITCH.com
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@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@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org