<s>
A	O
voice	B-Protocol
engine	I-Protocol
is	O
a	O
software	O
subsystem	O
for	O
bidirectional	O
audio	O
communication	O
,	O
typically	O
used	O
as	O
part	O
of	O
a	O
telecommunications	O
system	O
to	O
simulate	O
a	O
telephone	O
.	O
</s>
<s>
The	O
voice	B-Protocol
engine	I-Protocol
is	O
typically	O
used	O
in	O
an	O
embedded	B-Architecture
system	I-Architecture
.	O
</s>
<s>
The	O
term	O
became	O
popularized	O
after	O
2000	O
with	O
the	O
proliferation	O
of	O
voice	B-Application
over	I-Application
internet	I-Application
protocol	I-Application
technology	O
in	O
software	O
DSP	B-General_Concept
systems	O
.	O
</s>
<s>
Voice	B-Protocol
engines	I-Protocol
handle	O
the	O
voice	O
processing	O
for	O
an	O
IP	B-Device
Phone	I-Device
system	O
on	O
a	O
standard	O
processor	O
,	O
compared	O
to	O
prior	O
generations	O
of	O
systems	O
which	O
required	O
dedicated	O
,	O
math-optimized	O
digital	B-Architecture
signal	I-Architecture
processor	I-Architecture
chips	O
.	O
</s>
<s>
Voice	B-Protocol
engines	I-Protocol
are	O
highly	O
optimized	O
software	O
subsystems	O
due	O
to	O
the	O
mathematically	O
complex	O
signal	O
processing	O
required	O
for	O
voice	O
filtering	O
and	O
speech	B-Application
coding	I-Application
.	O
</s>
<s>
The	O
filter	O
stages	O
and	O
coding	O
elements	O
within	O
a	O
voice	B-Protocol
engine	I-Protocol
are	O
designed	O
to	O
work	O
in	O
conjunction	O
with	O
a	O
larger	O
telecommunications	O
system	O
,	O
including	O
only	O
a	O
specific	O
and	O
limited	O
range	O
of	O
processing	O
to	O
minimize	O
the	O
voice	B-Protocol
engine	I-Protocol
's	O
memory	O
size	O
and	O
processor	O
usage	O
.	O
</s>
<s>
Compared	O
to	O
software	O
desktop	O
applications	O
which	O
might	O
employ	O
plugins	B-Application
to	O
continually	O
add	O
flexibility	O
or	O
extensibility	O
,	O
a	O
voice	B-Protocol
engine	I-Protocol
is	O
designed	O
to	O
meet	O
specific	O
industry	O
standards	O
for	O
interoperability	O
.	O
</s>
