The full name of Ogg should be OGG Vobis (ogg Vorbis), which is a new audio compression format, similar to existing music formats such as MP3. But one thing is different: it is completely free, open and patent-free. OGG Vobis has a very outstanding feature, that is, it supports multi-channel. With its popularity, it will not be a dream to use a Walkman to listen to DTS-encoded multi-channel works in the future. Vorbis is the name of this audio compression mechanism, and Ogg is the name of a project that intends to design a completely open multimedia system. Currently, only the OggVorbis part of the plan has been implemented. The extension for Ogg Vorbis files is .OGG. The design format of this file is very advanced. OGG files created now can be played on any player in the future, so the file format can continue to improve in size and sound quality without affecting older encoders or players.