3GPP TSG SA WG3-LI								S3LI02_050
29-31 January 2002
Amsterdam, Netherlands

From: 	Owen, Brad V (Brad)[SMTP:bvowen@LUCENT.COM]
Reply To: 	Owen, Brad V (Brad)
Sent: 	09 January 2002 17:04
To: 	3GPP_TSG_SA_WG3_LI@LIST.ETSI.FR
Subject: 	FW: NP-010710: AMR-WB TSs from SA4

Something for the next meeting.

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From:  kari.ju.jarvinen@nokia.com <mailto:kari.ju.jarvinen@nokia.com>
[SMTP:kari.ju.jarvinen@nokia.com] <mailto:[SMTP:kari.ju.jarvinen@nokia.com]>

Sent:  23 December 2001 14:18
To:  bvowen@lucent.com <mailto:bvowen@lucent.com>
Cc:  ian.park@vf.vodafone.co.uk; <mailto:ian.park@vf.vodafone.co.uk;>
Rolf.Schitzler@d2vodafone.de <mailto:Rolf.Schitzler@d2vodafone.de>
Subject:  NP-010710: AMR-WB TSs from SA4

Dear Mr Owen,

The SA3 LI meeting on October 30th - November 1st, 2001 (Aspen, USA) had
sent a LS on "AMR-WB Speech Service - Core Network Aspects" (S3LI01_156,
NP-010710) to CN4 and CN plenary. I am sending this mail to you as you are
indicated as the contact person in the LS.
In the LS, SA3 LI requests quidance of "the latest WB-AMR specification" and
expresses the intention to "carry out a full review of this specification
for the next meeting". It is very good that SA3 has started work to study
the potential lawful interception impacts pertaining to the new CN4 WI.
Even though the LS was not sent to SA4 (the "Codec WG") and the LS is on the
new CN4 WI on AMR-WB Core Network Aspects (which is not SA4 area), I would
like to bring to your attention - as SA4 Chairman - that in a related SA4 WI
"Codec for Wideband Telephony Service" the AMR-WB speech codec itself has
been specified already earlier. A full set of 26-series TSs of the
fixed-point AMR-WB speech codec have been produced and have been approved by
TSG-SA. The TSs are listed in the below for your convenience:
TS 26.171       AMR Wideband Speech Codec; General description
TS 26.173       AMR Wideband Speech Codec; C-source code
TS 26.174       AMR Wideband Speech codec; Test sequences
TS 26.190       AMR Wideband Speech Codec; Transcoding Functions
TS 26.191       AMR Wideband Speech Codec; Error concealment of erroneous or
lost frames
TS 26.192       AMR Wideband Speech Codec; CN for AMR Speech Traffic
Channels
TS 26.193       AMR Wideband Speech Codec; Source Controlled Rate operation

TS 26.194       AMR Wideband Speech Codec; VAD for AMR Speech Traffic
Channels
TS 26.201       AMR Wideband Speech Codec; Speech Codec Frame Structure
TS 26.202       AMR Wideband Speech codec; Interface to Iu and Uu

These TSs define the transcoding functions of AMR-WB speech codec (including
Voice Activity Detection, Source Controlled Rate operation, Speech Codec
Frame Structure and Interface to Iu and Uu). All these TSs were approved for
Rel-5 at TSG-SA#11 in March 2001 (where it was also decided that the SA4
AMR-WB Codec WI is functionally frozen and only corrections would be allowed
to these specifications). These TSs are available in the 3GPP FTP-site. Some
of these TSs might be of interest for your review in SA3 LI and therefore I
wanted to bring these SA4 TSs into your attention in this mail.
SA4 is currently working on inclusion of AMR-WB codec into TS on "In-band
Tandem Free Operation of Speech Codecs" (TS 28.062). This work to include
AMR-WB for TFO operation is progressing well and is expected to be completed
by TSG-SA#15.

If you have any questions on the above mentioned SA4 AMR-WB codec TSs (or
the coding aspects of AMR-WB in general), do not hesitate to contact me. SA4
is also glad to give SA3 LI any guidance for the codec aspects of AMR-WB, if
needed. (The next SA4 meeting will be on February 18-22, 2002.)
                                Best regards,

                                Kari Jarvinen
                                3GPP TSG-SA WG4 (SA4) Chairman