Mpeg 2
MPEG-2 is the second standard in a set of specifications created by the Motion Pictures Experts Group. The standard was created in 1995 and maintains the capabilities of MPEG-1 with some additional features. MPEG-2, the preferred format in the compression of DVDs, digital TV, and video files, provides a track that transports audio for 5.1 surround sound, not just stereo. It also handles signals that communicate at a higher bitrate- which means that the quality is better, but requires a bigger sized file. The most beneficial addition to the MPEG standard, present in MPEG-2, is the aspect of support for interlaced video. Interlaced video alternates even and odd numbered lines of pixels as a screen refreshes, causing only half of the pixels to update. Despite the quality being altered, the human eye can not detect the change, and the signal is significantly more effectual.
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