Lumenvox ASR
About
LumenVox LLC
3615 Kearny Villa Road #202
San Diego, CA 92123
USA
Website: http://www.lumenvox.com
Definition
The LumenVox Speech Engine is the only speech software that is directly programmed to work with the connector bridge and will allow your Asterisk applications to accept input via a caller's voice. LumenVox supports US, UK and Australian English, Mexican and South American Spanish, and Canadian French.
Languages
English (UK, US) · French (FR, Canadian) · Spanish (North America)
Installation
Before configuring speech recognition for the VoiceXML browser, install the LumenVox Speech Engine. Complete instructions for downloading and installing LumenVox on Asterisk can be found here: http://www.lumenvox.com/help/speechEngineAsterisk/index.htm.
Following are the main steps for a Debian distribution installation:
Add in /etc/apt/sources.list
deb http://www.lumenvox.com/packages/Debian binary/
Install the following packages:
apt-get install lumenvoxcore apt-get install lumenvoxclient apt-get install lumenvoxsre apt-get install lumenvoxlicenseserver
Start LumenVox deamons.
/etc/init.d/lvlicensed start /etc/init.d/lvsred start
Generate the Server ID File.
/usr/bin/lv_license_manager -g /root/Info.bts
Upload it in the LumenVox server with your account, and download the license.
Install the license.
/usr/bin/lv_license_manager –m /root/Licensexxxx_xx.bts
Download and install the Asterisk 1.4 connector bridge (tar.gz).
cp res_speech_lumenvox.so /usr/lib/asterisk/modules/ cp lumenvox.conf /etc/asterisk/
Lastly, restart Asterisk.
Configuration
To enable speech recognition, change the main speech parameter.
The “speech” parameter can get three values, “yes”, “automatic”, “no” or “emulation” (don’t generate errors if you enable speech grammars).
[general] … speech=automatic speechprovider=lumenvox …
You can specify the path directory where the built in grammars are stored with the “speechdirectory” parameter. The default value is “/opt/lumenvox/engine/vxi/%s/%s.gram.”
With the %s markers you can specify two parameters:
//* // Language parameters (examples: “es-ES” or “en-UK”) //* // Grammar name type, from the field attribute, “type” (examples: “digits”, “number”) [general] … speechdirectory=/opt/lumenvox/engine/vxi/%s/%s.gram …
In the VoiceXML browser configuration file :
############################ # ASR server configuration # ############################ client.rec.resource.0.cacheDir VXIString /tmp/cacheContent client.rec.resource.0.format VXIString grxml
You should create the grammar files or create symbolic links to the default grammars installed with the LumenVox package.
cd /opt/lumenvox/engine mkdir vxi cd vxi mkdir en-UK ln -s ../../Lang/BuiltinGrammars/ABNFNumber.gram number.gram ln -s ../../Lang/BuiltinGrammars/ABNFDigits.gram digits.gram ln -s ../../Lang/BuiltinGrammars/ABNFPhone.gram phone.gram
The following VoiceXML example uses the speech recognition, with the built in grammar, ‘digits.’
<?xml version="1.0" encoding="iso-8859-1"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml" xml:lang="en-UK">
<form>
<property name="inputmodes" value="voice"/>
<property name="timeout" value="30s"/>
<field name="text" type="digits">
<catch event="noinput nomatch">
<reprompt/>
</catch>
<prompt>
Speak to me:
</prompt>
</field>
<filled>
<prompt>
You say me:
<value expr="text" />
</prompt>
<clear namelist="text" />
</filled>
</form>
</vxml>
Release Notes
To enable dynamic grammars you need to configure the Vxi VoiceXML browser to generate temporary grammar files (look at our Vxi Developer Guide).