<s>
Transrating	B-General_Concept
is	O
the	O
process	O
by	O
which	O
video	B-General_Concept
files	I-General_Concept
and	O
audio	O
files	O
are	O
converted	O
to	O
a	O
reduced	O
bit	O
rate	O
while	O
still	O
maintaining	O
the	O
original	O
media	O
format	O
.	O
</s>
<s>
The	O
increased	O
popularity	O
of	O
mobile	O
video	O
viewing	O
,	O
on	O
sites	O
such	O
as	O
YouTube	B-General_Concept
,	O
has	O
led	O
to	O
an	O
increased	O
demand	O
for	O
transrating	B-General_Concept
.	O
</s>
<s>
The	O
widespread	O
availability	O
of	O
high	O
definition	O
screens	O
on	O
smartphones	O
like	O
iPhone	B-Device
and	O
Android	B-Application
devices	O
,	O
combined	O
with	O
high-speed	O
4G	O
networks	O
have	O
brought	O
high-resolution	O
mobile	O
video	O
into	O
the	O
mainstream	O
,	O
leading	O
to	O
an	O
explosion	O
of	O
video	O
traffic	O
.	O
</s>
