Vocoder - Speex

Table of Contents

Software & Plugins for Speex

BitWise IM
Linphone

Software & Plugins for Speex

http://speex.org/projects.html a list of projects with Speex support

BitWise IM

BitWise Chat is a cross-platform instant messenger that integrates voice chat and uses Speex for the audio compression.

Features

http://www.bitwiseim.com/features.php

BitWise IM is…

an instant messenger with many advanced features,
encrypted using proven, industry-standard methods,
available for Windows, Mac OS X and Linux,
direct connect, sending messages, etc. without a server,
its own network that does not rely on another system,
committed to privacy with no ads or spyware.

Packages

BitWise Personal: is for personal/home use and is free. Personal may not be used for any business or organization.
BitWise Plus: is also for personal/home use, but offers additional encryption and security features for a small, one-time fee.
BitWise Professional: is business-class instant messaging, providing administration, user rights, technical support, and more.

Linphone

Linphone is a web phone.

Features

Works as simply as a cellular phone. Two buttons, and one more to chat. Linphones includes a large variety of codecs (G711-ulaw, G711-alaw, LPC10-15, GSM, SPEEX and iLBC ). Thanks to the Speex codec it is able to provide high quality talks even with slow internet connections, like 28k modems. Understands the SIP protocol. SIP is a standardised protocol from the IETF (http://www.ietf.org), that is the organisation that made most of the protocols used in the internet. This guaranties compatibility with most SIP - compatible web phones. You just require a soundcard to use linphone. Other technical functionnalities include DTMF (dial tones) support though RFC2833 and ENUM support (to use SIP numbers instead of SIP addresses). Linphone is free software, released under the General Public Licence. Linphone is documented: there is a complete user manual readable from the application that explains you all you need to know. Linphone includes a sip test server called "sipomatic" that automatically answers to calls by playing a pre-recorded message.

Compatibility

Linphone is mostly sip compliant. It works successfully with these implementations:

eStara softphone (commercial software for windows)
Pingtel phones (with DNS enabled and VLAN QOS support disabled).
Hotsip, a free of charge phone for Windows.
Vocal, an open source SIP stack from Vovida that includes a SIP proxy that works with linphone since version 0.7.1.
Siproxd is a free sip proxy being developped by Thomas Ries because he would like to have linphone working behind his firewall. Siproxd is simple to setup and works perfectly with linphone.
Partysip aims at being a generic and fully functionnal SIP proxy. Visit the web page for more details on its functionalities.

Linphone may work also with other sip phones, but this has not been tested yet.

Linphone uses the SIP protocol to establish calls, for that reason it cannot work with H323 phones, because SIP and H323 are different and opposite protocols. H323 phones are Netmeeting (for windows), Gnome-meeting (Unix), OpenPhone…