A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Audio/Video Transport Working Group of the IETF.
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-ietf-avt-rtp-vmr-wb-04.txt
Pages : 33
Date : 2004-10-1
This document specifies a real-time transport protocol (RTP)
payload format to be used for the 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 formats
VMR-WB is a variable-rate multimode wideband speech codec
that has a number of operating modes, one of which is
interoperable with AMR-WB (i.e., RFC 3267) audio codec at
certain rates. Therefore, provisions have been made in
this draft to facilitate and simplify data packet exchange
between VMR-WB and AMR-WB in the interoperable mode with no
transcoding function involved.
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