The first MPEG format for compressed video, optimised for CD-ROM. MPEG-1 was designed for the transmission rates of about 1.5 Mbps achievable with Video-CD and CD-i.
Its compression algorithms allow better than VHS quality video and almost CD quality audio to be compressed onto and streamed off a single speed (1x) CD-ROM drive.
MPEG encoding can introduce blockiness, colour bleed and shimmering effects on video and lack of detail and quantization effects on audio. The official name of MPEG-1 is International Standard IS-11172.