DOLBY SURROUND

Dolby Surround was created by Dolby Laboratories in 1982 as a three channel home cinema format. It employed three channels of audio information for the front left and right stereo speakers and a mono third channel for a pair of rear surround speakers, with the rear channel interlaced with the main front stereo tracks. The Dolby Surround logo shown above is used on home software such as VHS Video to differentiate the home cinema format from the equivalent cinema format. Dolby Surround was originally replayed through a three channel Surround processor, which has since been replaced by Dolby Pro-Logic technology that adds a centre channel to the front.