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BOUNCE ietf(_at_)ietf(_dot_)org: Non-member submission from [James Salsman <james(_at_)bovik(_dot_)org>] (fwd)

2002-04-17 13:11:09
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Subject: Re: Audio/AMR
To: discuss(_at_)apps(_dot_)ietf(_dot_)org, 
vpim(_at_)lists(_dot_)neystadt(_dot_)org, jutta(_at_)pobox(_dot_)com,
        ietf(_at_)ietf(_dot_)org
Date: Wed, 17 Apr 2002 11:29:30 -0700 (PDT)
From: James Salsman <james(_at_)bovik(_dot_)org>
Organization: www.bovik.org
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I have almost convinced myself that Audio/AMR is not the same as GSM 6.10
-- can anyone please confirm or deny this?

Here is an Audio/AMR reference implementation for x86 PCs:

http://www.3gpp.org/ftp/tsg_sa/WG4_CODEC/AMR-Wideband/AMR-WB_Characterization_Phase/Executables/g7221%26amrnb400_exe.zip

Does anyone have source to an AMR codec?  I can't find it.

AMR is the mandatory format for voice message audio email attachments
according to the MMS (Multimedia Messaging System) ETSI cellular
telephone specification (ETSI 123 140), which incorporates the IETF MIME
and VPIM specifications in large part.

The MIME type registration for Audio/AMR is presently at:
  http://www.ietf.org/internet-drafts/draft-ietf-avt-rtp-amr-13.txt

The AMR specification is:  3GPP TS 26.101:
  http://www.3gpp.org/ftp/tsg_sa/tsg_sa/TSGS_06/Docs/PDF/SP-99562.pdf

Best wishes,
James



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