Dolby Digital is the name for audio compression technologies developed by
Dolby Laboratories. It was originally named
Dolby Stereo Digital until
1994. Except for Dolby TrueHD, the audio compression is
lossy. The first use of Dolby Digital was to provide digital sound in cinemas from 35mm film prints. It is now also used for other applications such as HDTV broadcast,
DVDs,
Blu-ray Discs and game consoles.