Dolby is the name given to an audio compression technology. It has several versions with differing features.
 Dolby Digital
Dolby Digital is the name for what has now become a family of audio compression technologies developed by Dolby Laboratories. A favorite is Dolby AC-3 which used to be synonymous with Dolby Digital. Another version is Dolby Digital Plus (E-AC-3).
 Dolby Atmos
This technique adds a feature of feeling like you are immerced in with the sound.
 Dolby Vision Cinema
- Deeper connection - Step into the scene of your favorite shows and the best movies. Connect more deeply with the characters and story when you experience your entertainment in Dolby.
- Premium, immersive entertainment - Take the best shows and movies to the next level with the immersive sound of Dolby Atmos® and ultravivid picture of Dolby Vision® for a premium entertainment experience.