MPEG-1 overview
Coding of moving pictures and digital audio
MPEG-1 video (ISO/IEC 11172-2)
lossy compression
average VHS quality
MPEG-1 audio (ISO/IEC 11172-3)
lossy compression
from radio to CD quality

System layer
MPEG-1 systems (ISO/IEC 11172-1)
multiplexing
data storage (CD-Rom)
data transmission (Network)