The references for AMR are:
26.071 AMR speech Codec; General description
26.073 AMR speech Codec; C-source code
26.074 AMR speech Codec; Test sequences
All three can be found at:
ftp://ftp.3gpp.org/Specs/latest/R1999/26_series/
Regards
Clark
R. Clark Misul
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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_Characterizatio
n_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