<s>
Full	B-Algorithm
Rate	I-Algorithm
(	O
FR	O
or	O
GSM-FR	B-Algorithm
or	O
GSM	B-Algorithm
06.10	I-Algorithm
or	O
sometimes	O
simply	O
GSM	O
)	O
was	O
the	O
first	O
digital	O
speech	B-Application
coding	I-Application
standard	O
used	O
in	O
the	O
GSM	O
digital	O
mobile	O
phone	O
system	O
.	O
</s>
<s>
It	O
uses	O
linear	B-Algorithm
predictive	I-Algorithm
coding	I-Algorithm
(	O
LPC	O
)	O
.	O
</s>
<s>
Gradually	O
FR	O
will	O
be	O
replaced	O
by	O
Enhanced	B-Algorithm
Full	I-Algorithm
Rate	I-Algorithm
(	O
EFR	O
)	O
and	O
Adaptive	B-Algorithm
Multi-Rate	I-Algorithm
(	O
AMR	O
)	O
standards	O
,	O
which	O
provide	O
much	O
higher	O
speech	O
quality	O
with	O
lower	O
bit	O
rate	O
.	O
</s>
<s>
GSM-FR	B-Algorithm
is	O
specified	O
in	O
ETSI	O
06.10	O
(	O
ETS	O
300	O
961	O
)	O
and	O
is	O
based	O
on	O
RPE-LTP	O
(	O
Regular	O
Pulse	O
Excitation	O
-	O
Long	O
Term	O
Prediction	O
)	O
speech	B-Application
coding	I-Application
paradigm	O
.	O
</s>
<s>
Like	O
many	O
other	O
linear	B-Algorithm
predictive	I-Algorithm
coding	I-Algorithm
(	O
LPC	O
)	O
speech	B-Application
codecs	I-Application
,	O
linear	O
prediction	O
is	O
used	O
in	O
the	O
synthesis	O
filter	O
.	O
</s>
<s>
However	O
,	O
unlike	O
most	O
modern	O
speech	B-Application
codecs	I-Application
,	O
the	O
order	O
of	O
the	O
linear	O
prediction	O
is	O
only	O
8	O
.	O
</s>
<s>
In	O
modern	O
narrowband	O
speech	B-Application
codecs	I-Application
the	O
order	O
is	O
usually	O
10	O
and	O
in	O
wideband	O
speech	B-Application
codecs	I-Application
the	O
order	O
is	O
usually	O
16	O
.	O
</s>
<s>
The	O
speech	O
encoder	O
accepts	O
13	O
bit	O
linear	B-Algorithm
PCM	I-Algorithm
at	O
an	O
8kHz	O
sample	O
rate	O
.	O
</s>
<s>
This	O
can	O
be	O
direct	O
from	O
an	O
analog-to-digital	O
converter	O
in	O
a	O
phone	O
or	O
computer	O
,	O
or	O
converted	O
from	O
G.711	B-Algorithm
8-bit	O
nonlinear	O
A-law	B-Algorithm
or	O
μ-law	B-Algorithm
PCM	B-Algorithm
from	O
the	O
PSTN	O
with	O
a	O
lookup	O
table	O
.	O
</s>
<s>
The	O
free	O
libgsm	O
codec	O
can	O
encode	O
and	O
decode	O
GSM	B-Algorithm
Full	I-Algorithm
Rate	I-Algorithm
audio	O
.	O
</s>
<s>
This	O
codec	O
can	O
also	O
be	O
compiled	O
into	O
Wine	B-Application
to	O
provide	O
GSM	O
audio	O
support	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
Winamp	B-Application
plugin	O
for	O
raw	O
GSM	B-Algorithm
06.10	I-Algorithm
based	O
on	O
the	O
libgsm	O
.	O
</s>
<s>
The	O
GSM	B-Algorithm
06.10	I-Algorithm
is	O
also	O
used	O
in	O
VoIP	B-Application
software	O
,	O
for	O
example	O
in	O
Ekiga	B-Language
,	O
QuteCom	B-Protocol
,	O
Linphone	B-Protocol
,	O
Asterisk	B-Language
(	O
PBX	O
)	O
,	O
Ventrilo	B-Operating_System
and	O
others	O
.	O
</s>
