http://www.rfc-editor.org/rfc/rfc3557.txt
RFC 3557: RTP Payload Format for European Telecommunications Standards Institute (ETSI) European Standard ES 201 108 Distributed Speech Recognition Encoding, Q. Xie2003-07-01T23:00:00-00:00This document specifies an RTP payload format for encapsulating European Telecommunications Standards Institute (ETSI) European Standard (ES) 201 108 front-end signal processing feature streams for distributed speech recognition (DSR) systems. [STANDARDS-TRACK]