From Wikipedia, the free encyclopedia
Shorthand name for a family of video display resolutions
480p
is the shorthand name for a family of video
display resolutions
. The p stands for
progressive scan
, i.e. non-
interlaced
. The
480
denotes a vertical resolution of 480
pixels
, usually with a
horizontal resolution
of 640
pixels
and
4:3
aspect ratio
(
480?×?
4
⁄
3
=
640) or a horizontal resolution of 854 (848 should be used for mod16 compatibility)
[1]
pixels for an approximate
16:9 aspect ratio
(
480?×?
16
⁄
9
=
853.
3
). Since a pixel count must be a whole number, in
Wide VGA
displays it is generally rounded up to 854 to ensure inclusion of the entire image. The
frames
are displayed progressively as opposed to
interlaced
. 480p was used for many early
plasma televisions.
[2]
[3]
Standard definition
has always been a 4:3 aspect ratio with a pixel resolution of
720?×?480
at 60 Hz for
NTSC
regions, and 720 or
768?×?576
for
PAL
regions (1024 wide for
widescreen
displays). However, standard definition defines a 15.7k Hz horizontal scanrate, which means that interlacing has to be used for those resolution modes. The lowercase letter "p" in 480p stands for progressive, so the two must not be confused.
ATSC progressive mode standards
[
edit
]
The
ATSC
digital television
standards define 480p with 640×480p (4:3) pixel resolutions, at 24, 30, or 60 frames per second.
When 480p30 is broadcast on air, it is frame doubled then interlaced to 480i60. In case of
480p24
, it is processed using the
3:2 pulldown
technique to 480i60. In both cases the spatial resolution doesn't change, but the conversion to a interlaced format allows a direct digital to analog conversion for eventual broadcast on the analog television network.
Resolutions
[
edit
]
Standard
|
Resolution
|
Aspect ratio
|
Notes
|
480p (1:1)
|
480?×?480p
|
1:1
|
Typically used for
Vine
videos, or any other social media use.
|
480p (4:3)
|
640?×?480p
|
4:3
|
The most common 480p aspect ratio, typically used for cameras and video formats. (See also:
VGA
.)
|
480p (3:2)
|
720?×?480p
|
3:2
|
The same aspect ratio used on the iPod Touch 4 and is also used
anamorphically
on
NTSC-region
DVD video
.
|
480p (16:10)
|
768?×?480p
|
16:10
|
-
|
480p (5:3)
|
800?×?480p
|
5:3
|
This resolution is used on the
Samsung Galaxy S II
.
|
480p (16:9)
|
848?×?480p
|
~16:9
|
The mod16 compatible.
[1]
|
480p (16:9)
|
854?×?480p
|
~16:9
|
The resolution 854×480 is used when 480p is selected on a widescreen
YouTube
video.
[
citation needed
]
|
480p (18:10)
|
864?×?480p
|
18:10
|
-
|
480p (1.85:1)
|
888?×?480p
|
1.85:1
|
The unscaled
Academy format
.
|
480p (2:1)
|
960?×?480p
|
2:1
|
The double-squared 480p.
|
See also
[
edit
]
References
[
edit
]
|
---|
Television
|
---|
Analog
| 405 lines
| |
---|
525 lines
| |
---|
625 lines
|
- System B
,
C
,
D
,
G
,
H
,
I
,
K
,
L
,
N
- Color systems:
PAL
,
PAL-N
,
PALplus
,
SECAM
- MAC
|
---|
819 lines
| |
---|
1125 lines
| |
---|
1250 lines
| |
---|
Audio
| |
---|
Hidden signals
| |
---|
Historical
| |
---|
|
---|
Digital
| |
---|
|
|
|
|
---|
Designation
|
Usage examples
|
Definition (lines)
|
Rate (Hz)
|
Interlaced (fields)
|
Progressive (frames)
|
|
---|
Low,
MP@LL
| |
---|
Standard,
MP@ML
| |
---|
Enhanced,
HMP@HML
| |
---|
High,
MP@HL
|
HDTV
,
BD
,
HD DVD
,
HDV
|
720
|
|
24, 30, 60; 25, 50
|
1080, 1440
|
60; 50
|
24, 30, 60; 25, 50
|
|
---|
Ultra-high
| |
---|