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3GP (3GPP file format) is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for 3G UMTS multimedia services.

It is used on 3G mobile phones but can also be played on some 2G and 4G phones.

TV standards through 1080p.

The red-tinted image shows 576i or 576p resolution.

The blue-tinted image shows 720p resolution, an HDTV level of resolution.

The full-color image shows 1080 resolution.

This chart shows the most common display resolutions, 720p being one of the 16:9 formats shown in blue.

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 aspect ratio (480 × = 640) or a horizontal resolution of 854 or less (848 should be used for mod16 compatibility) pixels for an approximate (480 × = 853).

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.

Standard definition has always been a 4:3 aspect ratio with a pixel resolution of 720 × 480 at 60Hz for NTSC regions, and 720 or 768 × 576 for PAL regions (1024 wide for widescreen displays).

However, standard definition defines a 15.7Khz 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.

MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere.

Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended — defining additional bit-rates and support for more audio channels — as the third audio format of the subsequent MPEG-2 standard.

A third version, known as MPEG 2.5 — extended to better support lower bit rates — is commonly implemented, but is not a recognized standard.