MPEG-2
MPEG-2 (Motion Picture Experts Group standard 2) reduces a digital signal from 166 Mbits to 5 Mbits, allowing broadcasters to transmit digital signals using existing cable, satellite, and terrestrial systems. MPEG-2 uses the lossy compression method, which means that the digital signal sent to the television is compressed and some data is lost, but this lost data does not affect how the human eye views the picture. Both the ATSC and DVB standards selected MPEG-2 for video compression and transport.