MP3 is the name (and frequently the file extension) for files containing data formatted in a commonly used format. It is used to digitally represent audio files compressed using the MPEG audio layer 3 compression technology.

Note that MP3 is a lossy compression format.

See MP3 ( for additional information on the subject.

Reassembling and Decoding MPEG-1 Video Packets ( is a student project from the National University of Singapore, features C++ code for decoding and encoding MPEG video packets, with Tcl bindings via OTcl