<s>
SVOPC	B-Protocol
(	O
Sinusoidal	O
Voice	O
Over	O
Packet	O
Coder	O
)	O
is	O
a	O
compression	O
method	O
for	O
audio	O
which	O
is	O
used	O
by	O
VOIP	B-Application
applications	O
.	O
</s>
<s>
It	O
is	O
a	O
lossy	B-Algorithm
speech	B-Application
compression	I-Application
codec	B-General_Concept
designed	O
specifically	O
towards	O
communication	O
channels	O
suffering	O
from	O
packet	B-Protocol
loss	I-Protocol
.	O
</s>
<s>
It	O
uses	O
more	O
bandwidth	B-Algorithm
than	O
best	O
bandwidth-optimised	O
codecs	B-General_Concept
,	O
but	O
it	O
is	O
packet	B-Protocol
loss	I-Protocol
resistant	O
instead	O
.	O
</s>
<s>
Skype	O
Limited	O
developed	O
a	O
codec	B-General_Concept
called	O
'	O
SVOPC	B-Protocol
 '	O
for	O
Skype	O
.	O
</s>
<s>
Starting	O
with	O
Skype	O
4.0	O
,	O
SVOPC	B-Protocol
is	O
replaced	O
by	O
SILK	O
.	O
</s>
<s>
The	O
codec	B-General_Concept
uses	O
a	O
16kHz	O
sample	O
rate	O
and	O
allows	O
for	O
8kHz	O
of	O
audio	O
bandwidth	B-Algorithm
.	O
</s>
<s>
SVOPC	B-Protocol
provides	O
synthesized	O
speech	O
of	O
good	O
subjective	O
quality	O
at	O
around	O
20	O
kbit/s	O
.	O
</s>
<s>
Because	O
the	O
compression	O
relies	O
on	O
floating	B-Algorithm
point	I-Algorithm
mathematics	O
it	O
can	O
be	O
inefficient	O
when	O
it	O
's	O
running	O
in	O
an	O
embedded	B-Architecture
system	I-Architecture
as	O
this	O
will	O
likely	O
not	O
offer	O
the	O
same	O
kind	O
of	O
floating	B-Algorithm
point	I-Algorithm
capabilities	O
as	O
,	O
say	O
,	O
a	O
PC	O
.	O
</s>
<s>
The	O
new	O
codec	B-General_Concept
SILK	O
has	O
been	O
designed	O
with	O
this	O
in	O
mind	O
.	O
</s>
