<s>
G.723.1	B-Algorithm
is	O
an	O
audio	O
codec	B-General_Concept
for	O
voice	O
that	O
compresses	O
voice	O
audio	O
in	O
frames	O
.	O
</s>
<s>
It	O
is	O
sometimes	O
associated	O
with	O
a	O
Truespeech	B-Algorithm
trademark	O
in	O
coprocessors	O
produced	O
by	O
DSP	O
Group	O
.	O
</s>
<s>
This	O
is	O
a	O
completely	O
different	O
codec	B-General_Concept
from	O
G.723	B-Algorithm
.	O
</s>
<s>
There	O
are	O
two	O
bit	O
rates	O
at	O
which	O
G.723.1	B-Algorithm
can	O
operate	O
:	O
</s>
<s>
G.723.1	B-Algorithm
is	O
mostly	O
used	O
in	O
Voice	B-Application
over	I-Application
IP	I-Application
(	O
VoIP	B-Application
)	O
applications	O
due	O
to	O
its	O
low	O
bandwidth	O
requirement	O
.	O
</s>
<s>
Music	O
or	O
tones	O
such	O
as	O
DTMF	O
or	O
fax	O
tones	O
cannot	O
be	O
transported	O
reliably	O
with	O
this	O
codec	B-General_Concept
,	O
and	O
thus	O
some	O
other	O
method	O
such	O
as	O
G.711	B-Algorithm
or	O
out-of-band	O
methods	O
should	O
be	O
used	O
to	O
transport	O
these	O
signals	O
.	O
</s>
<s>
G.723.1	B-Algorithm
is	O
a	O
required	O
audio	O
codec	B-General_Concept
in	O
the	O
H.324	O
ITU-T	O
recommendation	O
for	O
H.324	O
terminals	O
offering	O
audio	O
communication	O
.	O
</s>
<s>
In	O
3GPP	O
3G-324M	B-Application
specification	O
support	O
for	O
G.723.1	B-Algorithm
is	O
not	O
mandatory	O
,	O
but	O
recommended	O
.	O
</s>
<s>
The	O
complexity	O
of	O
the	O
algorithm	O
is	O
rated	O
at	O
25	O
,	O
using	O
a	O
relative	O
scale	O
where	O
G.711	B-Algorithm
is	O
1	O
and	O
G.729a	B-Algorithm
is	O
15	O
.	O
</s>
<s>
As	O
of	O
January	O
1	O
,	O
2017	O
,	O
the	O
patent	O
terms	O
of	O
most	O
patents	O
applying	O
to	O
G.723.1	B-Algorithm
have	O
expired	O
.	O
</s>
<s>
With	O
regard	O
to	O
the	O
unexpired	O
licensed	O
patents	O
of	O
their	O
G.723.1	B-Algorithm
patent	O
license	O
agreement	O
,	O
the	O
licensors	O
of	O
G.723.1	B-Algorithm
patents	O
,	O
namely	O
AudioCodes	O
,	O
Orange	O
SA	O
,	O
and	O
Université	O
de	O
Sherbrooke	O
have	O
agreed	O
to	O
license	O
their	O
patents	O
under	O
the	O
existing	O
terms	O
on	O
a	O
royalty-free	O
basis	O
starting	O
January	O
1	O
,	O
2017	O
.	O
</s>
<s>
The	O
authorized	O
intellectual	O
property	O
rights	O
licensing	O
administrator	O
for	O
G.723.1	B-Algorithm
technology	O
is	O
Sipro	O
Lab	O
Telecom	O
.	O
</s>
<s>
Members	O
of	O
the	O
G.723.1	B-Algorithm
patent	O
pool	O
are	O
AudioCodes	O
,	O
France	O
Telecom	O
,	O
Université	O
de	O
Sherbrooke	O
,	O
Nippon	O
Telegraph	O
and	O
Telephone	O
Corporation	O
and	O
Nokia	O
.	O
</s>
