Media Resource Control Protocol: Difference between revisions

Revision as of 10:03, 23 December 2009

Revision as of 22:40, 20 April 2010

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'''Media Resource Control Protocol''' (MRCP) is a communication protocol used by speech servers to provide various speech services (such as [[speech recognition]] and [[speech synthesis]]) to its clients. Clients send MRCP messages to the server over a network usually by means of another protocol, such as [[Real Time Streaming Protocol]] (RTSP) or [[Session Initiation Protocol]] ([[Session_Initiation_ProtocolSession Initiation Protocol|SIP]]).

{{Orphan|date=February 2009}}

'''Media Resource Control Protocol''' (MRCP) is a communication protocol used by speech servers to provide various speech services (such as [[speech recognition]] and [[speech synthesis]]) to its clients. Clients send MRCP messages to the server over a network usually by means of another protocol, such as [[Real Time Streaming Protocol]] (RTSP) or [[Session Initiation Protocol]] ([[Session_Initiation_Protocol|SIP]]).

MRCP uses a similar style of clear-text signaling as [[HTTP]] and many other Internet protocols, in which each message contains 3 sections: a first-line, a header and a body. The first line indicates the type of message as well as information such as response codes. The header contains a number of lines, each in the format '''<header>: <data>'''. The body, whose length is specified by the header, contains the details of the message.

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Like HTTP, MRCP uses a request (usually issued by the client) and response model. Responses may simply acknowledge receipt of the request or give other information regarding its processing. For example, an MRCP client may request to send some audio [[data]] for processing (say, for speech recognition), to which the server could respond with a message containing a suitable [[port number]] to send the data, since MRCP does not have support for audio data specifically as this would have to be handled by some other protocol, such as [[Real-time Transport Protocol]] (RTP).

There are two versions of the MRCP protocol. Version 2 uses [[Session_Initiation_ProtocolSession Initiation Protocol|SIP]] as the control protocol, whereas version 1 uses RTSP.

==External links==

* RFC 4463, A Media Resource Control Protocol (MRCP)

* [http://www.unimrcp.org UniMRCP], An open source cross-platform MRCP implementation

[[Category: Internet protocols]]

[[Category:Application layer protocols]]

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[[de:Media Resource Control Protocol]]

[[fr:MRCP]]