Dolby Surround was the earliest consumer version of Dolby's multichannel analog film sound format Dolby Analog SR (Spectral Recording). Image File history File links Download high resolution version (1000x1000, 29 KB) File links The following pages link to this file: Dolby Surround ... Image File history File links Download high resolution version (1000x1000, 29 KB) File links The following pages link to this file: Dolby Surround ... The Dolby logo Dolby Laboratories, Incorporated (Dolby Labs) is a company specializing in audio compression and reproduction. ... Dolby Analog SR, originally simply Dolby Analog was Dolby Labratories first multichannel film sound format, developed in 1976. ...
When a Dolby Surround soundtrack is produced, four channels of audio information—Left, Center, Right, and Mono surround—are matrix-encoded onto two audio tracks. The stereo information is then carried on stereo sources such as videotapes, laserdiscs and TV Broadcasts from which the surround information can be decoded by a processor to recreate the original four-channel surround sound. Without the decoder, the information plays in standard Stereo. The Dolby Surround decoding technology was updated during the 1980s and re-named Dolby Pro Logic. The term Dolby Surround is still used, however, to describe sountracks that are matrix-encoded using this technique. Soundtrack refers to the recorded sound accompanying a visual medium such as a motion picture, television show, or video game. ... Videotape is a means of recording television pictures and accompanying sound onto magnetic tape as opposed to movie film. ... Pioneers LaserDisc Logo The Laserdisc (LD) was the first commercial optical disc storage medium, and was used primarily for the presentation of movies. ... // Events and trends The 1980s marked an abrupt shift towards more conservative lifestyles after the momentous cultural revolutions which took place in the 1960s and 1970s and the definition of the AIDS virus in 1981. ... Dolby Pro Logic is a surround sound processing technology designed to decode soundtracks encoded with Dolby Surround. ...
Dolby Digital EX is very similar in practice to Dolby's earlier Pro-Logic format, which utilized Matrix technology to add a center and single rear surround channel to stereo soundtracks.
Dolby Digital SR-D cinema soundtracks are optically recorded on a 35mm release print using sequential data blocks placed between every perforation hole on the sound track side of the film.
Dolby is part of a group of organizations involved in the development of AAC (Advanced Audio Coding), part of MPEG specifications, and also considered the successor to MP3.
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