<s>
Rasta	B-Algorithm
filtering	I-Algorithm
then	O
removes	O
slow	O
channel	O
variations	O
.	O
</s>
<s>
It	O
has	O
also	O
been	O
applied	O
to	O
cepstrum	B-Algorithm
feature-based	O
preprocessing	O
with	O
both	O
log	O
spectral	O
and	O
cepstral	B-Algorithm
domain	O
filtering	O
.	O
</s>
<s>
Filtering	O
is	O
normally	O
performed	O
in	O
the	O
cepstral	B-Algorithm
domain	O
.	O
</s>
<s>
The	O
mean	O
becomes	O
the	O
long	O
term	O
cepstrum	B-Algorithm
and	O
is	O
typically	O
computed	O
on	O
the	O
speech	O
part	O
for	O
each	O
separate	O
utterance	O
.	O
</s>
