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480p is the shorthand name for a family of videodisplay resolutions. The p stands forprogressive scan, i.e. non-interlaced. The480 denotes a vertical resolution of 480pixels, usually with ahorizontal resolution of 640pixels and4:3aspect ratio (480 × 4⁄3 = 640) or a horizontal resolution of 854 (848 should be used for mod16 compatibility)[1] pixels for an approximate16:9 aspect ratio (480 × 16⁄9 = 853.3). Since a pixel count must be a whole number, inWide VGA displays it is generally rounded up to 854 to ensure inclusion of the entire image. Theframes are displayed progressively as opposed tointerlaced. 480p was used for many earlyplasma televisions.[2][3]Standard definition has always been a 4:3 aspect ratio with a pixel resolution of720 × 480 at 60 Hz forNTSC regions, and 720 or768 × 576 forPAL regions (1024 wide forwidescreen 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.
TheATSCdigital 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 of480p24, it is processed using the3:2 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.
| Standard | Resolution | Aspect ratio | Notes |
|---|---|---|---|
| 480p (1:1) | 480 × 480p | 1:1 | Typically used forVine 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 usedanamorphically onNTSC-regionDVD video. |
| 480p (16:10) | 768 × 480p | 16:10 | - |
| 480p (5:3) | 800 × 480p | 5:3 | This resolution is used on theSamsung 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 widescreenYouTube video.[citation needed] |
| 480p (18:10) | 864 × 480p | 18:10 | - |
| 480p (1.85:1) | 888 × 480p | 1.85:1 | The unscaledAcademy format. |
| 480p (2:1) | 960 × 480p | 2:1 | The double-squared 480p. |
