VoIP Calls Double In Quality 116
anthm writes "From Newsforge and
LinuxPR
FreeSWITCH, an open source soft-switch and IVR platform, have announced that they can support 16khz audio calls thus doubling the potential voice quality. They have had successful tests with a conference bridge, a pass-through SIP call and an IVR that reads RSS news feeds with the Cepstral Text-To-Speech Engine."
FreeSWITCH, an open source soft-switch and IVR platform, have announced that they can support 16khz audio calls thus doubling the potential voice quality. They have had successful tests with a conference bridge, a pass-through SIP call and an IVR that reads RSS news feeds with the Cepstral Text-To-Speech Engine."
Voip-Info.org has a good list of business VoIP providers.
Please get the rest of the telcomms to follow. (Score:4, Informative)
Still, its a good piece of news, onward and upwards.
*crosses fingers* Please nobody mention video phones. *crosses fingers*
Define: IVR (Score:4, Informative)
So I knew what one was, I just didn't know there was a TLA for them. This inane personal revelation brought to you by the captcha "accuse".
-theGreater.
Re:Please get the rest of the telcomms to follow. (Score:2, Informative)
Re:Doubling? hardly (Score:5, Informative)
Only a slight improvement (Score:5, Informative)
In theory a SIP server doesn't need to know all of the codecs a client supports - the clients themselves negotiate any compatible protocol.
Of course, if the sip server puts itself in the path (such as when it needs to pass through to PSTN or firewalled clients), then 8KHz is the (till now) maximum supported rate.
Nothing special here... (Score:1, Informative)
The phone people (probabably AT&T) chose that standard since it gave pretty good voice quality given the limitations of current technology.
People are generally happy with the voice quality of the phone system - which is different from the voice quality of the last mile - the analog copper loop to your house, or CDMA/GSM/TDMA to your cell phone.
It's highly unlikely this new codec will catch on - the installed base of G.711 phone systems out there is enormous.
Re:Marketing BS (Score:2, Informative)
Because it covers almost all of the human voice (Score:3, Informative)
The reason for chosing 16kHz is probably simply that it's twice what you have before. Thus if you are interfacing with an old system that doesn't support it, just discard every other sample, no sample rate conversion needed (which is CPU intensive).