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Title : Real-Time Transport Protocol (RTP) Payload and File
Storage Formats for the Variable-Rate Multimode
Wideband (VMR-WB) Audio Codec
Author(s) : S. Ahmadi
Filename : draft-ahmadi-avt-rtp-vmr-wb-00.txt
Pages : 40
Date : 2003-10-20
This document specifies a real-time transport protocol (RTP)
payload format to be used for Variable-Rate Multimode Wideband (VMR-WB)
speech codec. The payload format is designed to be able to
interoperate with existing VMR-WB transport formats on non-IP
networks. In addition, a file format is specified for transport of
VMR-WB speech data in storage mode applications such as
email. A MIME type registration is included, for VMR-WB, specifying use of both the RTP payload and the storage format.
VMR-WB is a variable-rate multimode wideband speech codec that has a
number of operating modes, one of which is fully interoperable with AMR-WB (G.722.2) audio codec. Therefore, provisions have been made in
this draft to facilitate and simplify data packet exchange between VMR-WB and AMR-WB (i.e., RFC 3267) in the interoperable mode with minimal logic interworking function in the transport layer (i.e., a RTP translator).
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