i think that's what mod_vmd does On Mon, Mar 2, 2009 at 11:16 AM, Andy Spitzer <w...@nortel.com> wrote:
> Woof! > > On Sun, 01 Mar 2009 21:28:18 -0500, Brian West <br...@freeswitch.org> > wrote: > > > NO. You want something that people THINK exists and works well... > > Reliable human/voice detection doesn't exist in ANY form. > > I beg to differ. See http://www.freepatentsonline.com/5521967.html for > one way to do it. It works rather well and can quickly descriminate between > voice and tone. I've no idea who owns that patent now (not me, for sure). > > There is a simpler, less reliable way of differentiating voice from tone, > that as far as I know isn't patented. If you compare the RMS power levels > of sequential 40 mS periods, call progress tones will have very consistent > power levels from sample to sample. So if 5 or more 40 mS periods have > about the same power measurement (within say, 2%), it's a tone. Voice will > have dramatic power level differences over that same period. This works > very well in today's telephony environment, where tones are computer > generated. In the old days when ringback tone was generated off the audio > hum from the 20 Hz ring voltage generator...not so well. > > --Woof! > > _______________________________________________ > 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/ AIM: anthm MSN:anthony_miness...@hotmail.com <msn%3aanthony_miness...@hotmail.com> GTALK/JABBER/PAYPAL:anthony.miness...@gmail.com<paypal%3aanthony.miness...@gmail.com> IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:8...@conference.freeswitch.org <sip%3a...@conference.freeswitch.org> iax:gu...@conference.freeswitch.org/888 googletalk:conf+...@conference.freeswitch.org<googletalk%3aconf%2b...@conference.freeswitch.org> pstn:213-799-1400
_______________________________________________ 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
