<s>
Adaptive	B-Algorithm
Multi-Rate	I-Algorithm
Wideband	B-Algorithm
(	O
AMR-WB	O
)	O
is	O
a	O
patented	O
wideband	B-Algorithm
speech	B-Application
audio	O
coding	O
standard	O
developed	O
based	O
on	O
Adaptive	B-Algorithm
Multi-Rate	I-Algorithm
encoding	O
,	O
using	O
a	O
similar	O
methodology	O
to	O
algebraic	B-Algorithm
code-excited	I-Algorithm
linear	I-Algorithm
prediction	I-Algorithm
(	O
ACELP	B-Algorithm
)	O
.	O
</s>
<s>
AMR-WB	O
provides	O
improved	O
speech	B-Application
quality	O
due	O
to	O
a	O
wider	O
speech	B-Application
bandwidth	O
of	O
50	O
–	O
7000Hz	O
compared	O
to	O
narrowband	O
speech	B-Application
coders	I-Application
which	O
in	O
general	O
are	O
optimized	O
for	O
POTS	O
wireline	O
quality	O
of	O
300	O
–	O
3400Hz	O
.	O
</s>
<s>
AMR-WB	O
was	O
developed	O
by	O
Nokia	O
and	O
VoiceAge	O
and	O
it	O
was	O
first	O
specified	O
by	O
3GPP	O
.	O
</s>
<s>
AMR-WB	O
is	O
codified	O
as	O
G.722.2	B-Algorithm
,	O
an	O
ITU-T	O
standard	O
speech	B-Application
codec	I-Application
,	O
formally	O
known	O
as	O
Wideband	B-Algorithm
coding	O
of	O
speech	B-Application
at	O
around	O
16	O
kbit/s	O
using	O
Adaptive	B-Algorithm
Multi-Rate	I-Algorithm
Wideband	B-Algorithm
(	O
AMR-WB	O
)	O
.	O
</s>
<s>
G.722.2	B-Algorithm
AMR-WB	O
is	O
the	O
same	O
codec	O
as	O
the	O
3GPP	O
AMR-WB	O
.	O
</s>
<s>
The	O
corresponding	O
3GPP	O
specifications	O
are	O
TS	O
26.190	O
for	O
the	O
speech	B-Application
codec	I-Application
and	O
TS	O
26.194	O
for	O
the	O
Voice	O
Activity	O
Detector	O
.	O
</s>
<s>
The	O
AMR-WB	O
format	O
has	O
the	O
following	O
parameters	O
:	O
</s>
<s>
A	O
common	O
file	O
extension	O
for	O
the	O
AMR-WB	O
file	O
format	O
is	O
.awb	O
.	O
</s>
<s>
There	O
also	O
exists	O
another	O
storage	O
format	O
for	O
AMR-WB	O
that	O
is	O
suitable	O
for	O
applications	O
with	O
more	O
advanced	O
demands	O
on	O
the	O
storage	O
format	O
,	O
like	O
random	O
access	O
or	O
synchronization	O
with	O
video	O
.	O
</s>
<s>
3GP	O
also	O
allows	O
use	O
of	O
AMR-WB	O
bit	O
streams	O
for	O
stereo	O
sound	O
.	O
</s>
<s>
AMR-WB	O
operates	O
,	O
like	O
AMR	B-Algorithm
,	O
with	O
nine	O
different	O
bit	O
rates	O
.	O
</s>
<s>
The	O
lowest	O
bit	O
rate	O
providing	O
excellent	O
speech	B-Application
quality	O
in	O
a	O
clean	O
environment	O
is	O
12.65kbit/s	O
.	O
</s>
<s>
Higher	O
bitrates	O
for	O
speech	B-Application
in	O
adverse	O
background	O
noise	O
environments	O
,	O
combined	O
speech	B-Application
and	O
music	O
,	O
and	O
multi-party	O
conferencing	O
.	O
</s>
<s>
Notes	O
:	O
"	O
The	O
codec	O
mode	O
can	O
be	O
changed	O
every	O
20	O
ms	O
in	O
3G	B-Architecture
WCDMA	O
channels	O
and	O
every	O
40	O
ms	O
in	O
GSM/GERAN	O
channels	O
.	O
</s>
<s>
AMR-WB	O
has	O
been	O
standardized	O
by	O
a	O
mobile	O
phone	O
manufacturer	O
consortium	O
for	O
future	O
usage	O
in	O
networks	O
such	O
as	O
UMTS	B-Protocol
.	O
</s>
<s>
Its	O
speech	B-Application
quality	O
is	O
high	O
,	O
but	O
older	O
networks	O
will	O
have	O
to	O
be	O
upgraded	O
to	O
support	O
a	O
wideband	B-Algorithm
codec	O
.	O
</s>
<s>
In	O
October	O
2006	O
,	O
the	O
first	O
AMR-WB	O
tests	O
were	O
conducted	O
in	O
a	O
deployed	O
network	O
by	O
T-Mobile	O
in	O
Germany	O
,	O
in	O
cooperation	O
with	O
Ericsson	O
.	O
</s>
<s>
In	O
2007	O
an	O
end-to-end	O
AMR-WB	O
TrFO	O
capable	O
3G	B-Architecture
&	O
VoIP	O
product	O
line	O
was	O
commercially	O
released	O
by	O
NSN	O
(	O
M13.6	O
MSS	O
,	O
U3C	O
MGW	O
)	O
.	O
</s>
<s>
AMR-WB	O
TFO	O
support	O
was	O
commercially	O
released	O
in	O
2008	O
(	O
M14.2	O
,	O
U4.0	O
)	O
.	O
</s>
<s>
on	O
handover	B-Protocol
,	O
CF	O
or	O
CT	O
events	O
)	O
was	O
released	O
in	O
2009	O
(	O
M14.3	O
,	O
U4.1	O
)	O
.	O
</s>
<s>
In	O
late	O
2009	O
,	O
Orange	O
UK	O
announced	O
that	O
it	O
would	O
be	O
introducing	O
AMR-WB	O
on	O
its	O
network	O
in	O
2010	O
.	O
</s>
<s>
In	O
France	O
Orange	O
S.A.	O
and	O
SFR	O
are	O
using	O
AMR-WB	O
format	O
on	O
their	O
3G+	O
networks	O
since	O
the	O
end	O
of	O
summer	O
2010	O
.	O
</s>
<s>
WIND	O
Mobile	O
in	O
Canada	O
launched	O
HD	B-Algorithm
Voice	I-Algorithm
(	O
AMR-WB	O
)	O
on	O
its	O
3G+	O
network	O
in	O
February	O
,	O
2011	O
.	O
</s>
<s>
WIND	O
Mobile	O
also	O
announced	O
that	O
several	O
handsets	O
will	O
support	O
HD	B-Algorithm
Voice	I-Algorithm
(	O
AMR-WB	O
)	O
in	O
the	O
first	O
half	O
of	O
2011	O
,	O
with	O
the	O
first	O
one	O
being	O
Alcatel	O
Tribe	O
.	O
</s>
<s>
In	O
January	O
2013	O
,	O
T-Mobile	O
became	O
the	O
first	O
GSM/UMTS	O
based	O
network	O
in	O
the	O
US	O
to	O
enable	O
AMR-WB	O
.	O
</s>
<s>
In	O
Feb	O
2013	O
,	O
Chunghwa	O
Telecom	O
became	O
the	O
first	O
GSM/UMTS	O
based	O
network	O
in	O
Taiwan	O
to	O
enable	O
AMR-WB	O
.	O
</s>
<s>
In	O
August	O
2013	O
the	O
AMR-WB	O
standard	O
was	O
introduced	O
in	O
Ukraine	O
by	O
Kyivstar	O
.	O
</s>
<s>
Nokia	O
developed	O
the	O
VMR-WB	B-Algorithm
format	O
for	O
CDMA2000	O
networks	O
,	O
which	O
is	O
fully	O
interoperable	O
with	O
3GPP	O
AMR-WB	O
.	O
</s>
<s>
AMR-WB	O
is	O
also	O
a	O
widely	O
adapted	O
format	O
in	O
mobile	O
handsets	O
for	O
ringtones	O
.	O
</s>
<s>
The	O
AMR	B-Algorithm
wideband	B-Algorithm
speech	B-Application
format	O
shall	O
be	O
supported	O
in	O
3G	B-Architecture
multimedia	O
services	O
when	O
wideband	B-Algorithm
speech	B-Application
working	O
at	O
16kHz	O
sampling	O
frequency	O
is	O
supported	O
.	O
</s>
<s>
This	O
requirement	O
is	O
defined	O
in	O
3GPP	O
technical	O
specifications	O
for	O
IP	B-Protocol
Multimedia	I-Protocol
Subsystem	I-Protocol
(	O
IMS	O
)	O
,	O
Multimedia	O
Messaging	O
Service	O
(	O
MMS	O
)	O
and	O
Transparent	O
end-to-end	O
Packet-switched	O
Streaming	O
Service	O
(	O
PSS	O
)	O
.	O
</s>
<s>
In	O
3GPP	O
specifications	O
is	O
AMR-WB	O
format	O
also	O
used	O
in	O
3GP	O
container	O
format	O
.	O
</s>
<s>
G.722.2	B-Algorithm
is	O
licensed	O
by	O
VoiceAge	O
Corporation	O
.	O
</s>
<s>
For	O
encoding	O
and	O
decoding	O
AMR-WB	O
,	O
an	O
open-source	O
library	O
named	O
OpenCORE	O
exists	O
.	O
</s>
<s>
The	O
OpenCORE	O
codec	O
can	O
be	O
used	O
in	O
ffmpeg	B-Library
.	O
</s>
<s>
It	O
is	O
included	O
in	O
the	O
Android	B-Application
mobile	I-Application
operating	O
system	O
.	O
</s>
