What is MPEG 1 and MPEG 2?
MPEG is an acronym for Moving Pictures Experts Group, which developed a standard compression scheme used for compressing data for CD-ROM and for DVD replication. MPEG1 is used to compress digital video to the CD Audio data rate and is used most commonly with CD media. It squeezes 167 Mbits per second into about 1.4 Mbits per second, a reduction of over 99%. This compression method reduces the picture size, halves the horizontal resolution to 352 pixels, and discards one of the fields (halves the vertical resolution) and segments the frame for encoding. Lastly, the frames are analyzed and any parts that do not change from frame to frame are not stored, and any segment that has moved to another place but not changed is encoded with significant data savings. MPEG 1 can be played back on a computer screen at full screen 30 frames per second. MPEG2 is used with DVD media, and employs some of the same methods as MPEG1 but without the resolution and size reduction. MPEG2 varies the data it us
