<s>
Progressive	B-Device
scanning	I-Device
(	O
alternatively	O
referred	O
to	O
as	O
noninterlaced	O
scanning	O
)	O
is	O
a	O
format	O
of	O
displaying	O
,	O
storing	O
,	O
or	O
transmitting	O
moving	O
images	O
in	O
which	O
all	O
the	O
lines	O
of	O
each	O
frame	O
are	O
drawn	O
in	O
sequence	O
.	O
</s>
<s>
Progressive	B-Device
scanning	I-Device
became	O
universally	O
used	O
in	O
computer	B-Device
screens	I-Device
beginning	O
in	O
the	O
early	O
21st	O
century	O
.	O
</s>
<s>
This	O
rough	O
animation	O
compares	O
progressive	B-Device
scan	I-Device
with	O
interlace	O
scan	O
,	O
also	O
demonstrating	O
the	O
interline	O
twitter	O
effect	O
associated	O
with	O
interlacing	O
.	O
</s>
<s>
On	O
the	O
left	O
there	O
are	O
two	O
progressive	B-Device
scan	I-Device
images	O
.	O
</s>
<s>
The	O
original	O
resolutions	O
are	O
above	O
and	O
the	O
ones	O
with	O
spatial	B-Algorithm
anti-aliasing	I-Algorithm
are	O
below	O
.	O
</s>
<s>
Also	O
,	O
the	O
images	O
above	O
are	O
based	O
on	O
what	O
it	O
would	O
look	O
like	O
on	O
a	O
monitor	O
that	O
does	O
not	O
support	O
interlaced	O
scan	O
,	O
such	O
as	O
a	O
PC	B-Device
monitor	I-Device
or	O
an	O
LCD	O
or	O
plasma-based	O
television	O
set	O
,	O
with	O
the	O
interlaced	O
images	O
displayed	O
using	O
the	O
same	O
mode	O
as	O
the	O
progressive	O
images	O
.	O
</s>
<s>
Progressive	B-Device
scan	I-Device
is	O
used	O
for	O
scanning	O
and	O
storing	O
film-based	O
material	O
on	O
DVDs	O
,	O
for	O
example	O
,	O
as	O
480p24	O
or	O
576p25	O
formats	O
.	O
</s>
<s>
Progressive	B-Device
scan	I-Device
was	O
included	O
in	O
the	O
Grand	B-Device
Alliance	I-Device
's	O
technical	O
standard	O
for	O
HDTV	B-Device
in	O
the	O
early	O
1990s	O
.	O
</s>
<s>
It	O
was	O
agreed	O
that	O
all	O
film	O
transmission	O
by	O
HDTV	B-Device
would	O
be	O
broadcast	O
with	O
progressive	B-Device
scan	I-Device
in	O
the	O
US	O
.	O
</s>
<s>
Even	O
if	O
a	O
signal	O
is	O
sent	O
interlaced	O
,	O
an	O
HDTV	B-Device
will	O
convert	O
it	O
to	O
progressive	B-Device
scan	I-Device
.	O
</s>
<s>
Progressive	B-Device
scan	I-Device
is	O
used	O
for	O
most	O
cathode	B-Device
ray	I-Device
tube	I-Device
(	O
CRT	B-Device
)	O
computer	B-Device
monitors	I-Device
,	O
all	O
LCD	O
computer	B-Device
monitors	I-Device
,	O
and	O
most	O
HDTVs	B-Device
as	O
the	O
display	B-General_Concept
resolutions	I-General_Concept
are	O
progressive	O
by	O
nature	O
.	O
</s>
<s>
Other	O
CRT-type	O
displays	O
,	O
such	O
as	O
SDTVs	B-Device
,	O
needed	O
to	O
use	O
interlace	O
to	O
achieve	O
full	O
vertical	O
resolution	O
,	O
but	O
could	O
display	O
progressive	B-Device
video	I-Device
at	O
the	O
cost	O
of	O
halving	O
the	O
vertical	O
resolution	O
.	O
</s>
<s>
Before	O
HDTV	B-Device
became	O
common	O
,	O
some	O
TVs	O
and	O
video	O
projectors	O
were	O
produced	O
with	O
one	O
or	O
more	O
full-resolution	O
progressive-scan	B-Device
inputs	O
,	O
allowing	O
these	O
displays	O
to	O
take	O
advantage	O
of	O
formats	O
like	O
PALPlus	O
,	O
progressive	B-Device
scan	I-Device
DVD	O
players	O
,	O
and	O
certain	O
video	O
game	O
consoles	O
.	O
</s>
<s>
HDTVs	B-Device
support	O
the	O
progressively-scanned	O
resolutions	O
of	O
480p	O
and	O
720p	O
.	O
</s>
<s>
The	O
1080p	O
displays	O
are	O
usually	O
more	O
expensive	O
than	O
the	O
comparable	O
lower	O
resolution	O
HDTV	B-Device
models	O
.	O
</s>
<s>
At	O
the	O
debut	O
of	O
the	O
2010s	O
UHD	B-Device
TVs	I-Device
had	O
emerged	O
on	O
the	O
consumer	O
market	O
,	O
also	O
using	O
progressive	O
resolutions	O
,	O
but	O
usually	O
sold	O
with	O
prohibitive	O
prices	O
(	O
4k	B-Architecture
HDTVs	I-Architecture
)	O
or	O
were	O
still	O
in	O
prototype	O
stage	O
(	O
8k	B-Architecture
HDTVs	I-Architecture
)	O
.	O
</s>
<s>
Prices	O
for	O
consumer-grade	O
4k	B-Architecture
HDTVs	I-Architecture
have	O
since	O
lowered	O
and	O
become	O
more	O
affordable	O
,	O
which	O
has	O
increased	O
their	O
prevalence	O
amongst	O
consumers	O
.	O
</s>
<s>
Computer	B-Device
monitors	I-Device
can	O
use	O
even	O
greater	O
display	B-General_Concept
resolutions	I-General_Concept
.	O
</s>
<s>
The	O
disadvantage	O
of	O
progressive	B-Device
scan	I-Device
is	O
that	O
it	O
requires	O
higher	O
bandwidth	O
than	O
interlaced	O
video	O
that	O
has	O
the	O
same	O
frame	O
size	O
and	O
vertical	O
refresh	O
rate	O
.	O
</s>
<s>
The	O
main	O
advantage	O
with	O
progressive	B-Device
scan	I-Device
is	O
that	O
motion	O
appears	O
smoother	O
and	O
more	O
realistic	O
.	O
</s>
<s>
With	O
progressive	B-Device
scan	I-Device
there	O
is	O
no	O
need	O
to	O
introduce	O
intentional	O
blurring	O
(	O
sometimes	O
referred	O
to	O
as	O
anti-aliasing	O
)	O
to	O
reduce	O
interline	O
twitter	O
and	O
eye	O
strain	O
.	O
</s>
<s>
This	O
allows	O
the	O
viewer	O
to	O
achieve	O
the	O
desired	O
image	O
sharpness	O
with	O
both	O
interlaced	O
and	O
progressive	B-Device
displays	I-Device
.	O
</s>
<s>
Ideally	O
,	O
it	O
would	O
be	O
turned	O
on	O
when	O
played	O
on	O
an	O
interlaced	O
display	O
to	O
reduce	O
interline	O
twitter	O
,	O
and	O
off	O
when	O
played	O
on	O
a	O
progressive	B-Device
display	I-Device
for	O
maximum	O
image	O
clarity	O
.	O
</s>
<s>
Progressive	B-Device
scan	I-Device
also	O
offers	O
clearer	O
and	O
faster	O
results	O
for	O
scaling	O
to	O
higher	O
resolutions	O
than	O
its	O
equivalent	O
interlaced	O
video	O
,	O
such	O
as	O
upconverting	O
480p	O
to	O
display	O
on	O
a	O
1080p	O
HDTV	B-Device
.	O
</s>
<s>
HDTVs	B-Device
not	O
based	O
on	O
CRT	B-Device
technology	O
cannot	O
natively	O
display	O
interlaced	O
video	O
,	O
therefore	O
interlaced	O
video	O
must	O
be	O
deinterlaced	O
before	O
it	O
is	O
scaled	O
and	O
displayed	O
.	O
</s>
<s>
Deinterlacing	O
can	O
result	O
in	O
noticeable	O
visual	O
artifacts	O
and/or	O
input	B-Application
lag	I-Application
between	O
the	O
video	O
source	O
and	O
the	O
display	O
device	O
.	O
</s>
