MPEG founders had originally intended to develop the four versions: MPEG1-MPEG4, so as to apply to different bandwidth and quality requirements of digital imaging. Abandoned as a result of MPEG3 after, so there are only three versions of the existing MPEG: MPEG-1, MPEG-2, MPEG-4. Generally speaking, MPEG in three better than the other compression / decompression program. First of all, it is at the beginning as an international standard to study the development, so, MPEG has good compatibility. Secondly, MPEG algorithm can provide better than any other of the compression ratio up to 200:1. More importantly, MPEG in the provision of high compression ratio at the same time, a small loss of data.
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