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Product type | Sound format Surround sound Trademark |
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Owner | Dolby Laboratories |
Country | United States |
Introduced | 1976 |
Related brands | Dolby Digital |
Markets | Worldwide |
Website | Official website |
Dolby Stereo is a sound format made by Dolby Laboratories. It is a unified brand for two completely different basic systems: the Dolby SVA (stereo variable-area) 1976 system used with optical sound tracks on 35mm film,[1] and Dolby Stereo 70mm noise reduction on 6-channel magnetic soundtracks on 70mm prints.[2]
Dolby SVA significantly improves the development of sound effects in films and theorization of sound design by Walter Murch.[1] In 1982, it was adapted for home use as Dolby Surround when hi-fi capable consumer VCRs were introduced, and further improved in 1987 with the Dolby Pro Logic home decoding system.
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