Industry Standard Solutions for Speech, IVR and Telephony

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Industry Standards


Products Products Overview IntepreXer™ vXML Server Oktopous™ ccXML Browser Related Products Solutions Solutions Overview Voice Blaster Email by Phone Prescription Refill Customer Survey Auto Attendant Professional Services Services Offered Managed Center Platform Integration Oktopous™ Support Asterisk Support Voice Applications Engagement Models Industry Standards Overview VoiceXML 2.1 ccXML 1.0 SIP (VoIP) MRCPv2 Open Source Initiative The Initiative Oktopous™ PIK Asterisk Integration Alliances Our Offering About Us Company Overview Management Careers Contact Us Site Map Home	MRCPv2 for Speech MRCP is a protocol for PBX, IVR, Media Servers, etc. to communicate with ASR and TTS engines. Typically, this means the server software (ASR and TTS Engines) will be running on one server / computer and clients (PBX, IVR, Media Servers, etc) can send MRCP messages to the server over a network, usually on top of another protocol, such as SIP and SDP. MRCPv2 is more vendor-neutral, and is more transparently standards-based. In version 2 of the MRCP spec, SIP (Session Initiaition Protocol) and SDP (Session Description Protocol) are used to set up a session between the client requiring speech processing resources. Once the session as been set up, two separate channels are opened: a media channel for audio data streams, which uses RTP (Real-time Transport Protocol); and a control channel, running on TCP, in which messages in MRCP format are exchanged. MRCP v2 adds support for speaker verification and simple speech recording. Phonologies InterpreXer™ v4.0 readily supports MRCPv2.