MPEG 
A set of standards (pronounced "EM-peg") for compressing multimedia files. MPEG-1 is used in CD-ROMs. MPEG-2 is used for a broad range of formats, including DVD, high-definition TV, and surround sound. MPEG-4 is a standard for low-bandwidth video telephony and multimedia on the World Wide Web. (MPEG-3 was merged into MPEG-2.) The acronym MPEG stands for Moving Picture Experts Group, a working group of the International Standards Organization.