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Dolby Digital |
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Dolby Digital A family of digital audio encoding technologies from Dolby used in movie theaters, home theaters and video games. Introduced in the movie "Batman Returns" in 1992, Dolby Digital has been the most widely used surround sound system in the world. Following are the major formats. See Dolby Surround and surround sound.Dolby Digital - 5.1 Channels Five discrete channels of audio plus subwoofer (see surround sound). Dolby Digital employs Dolby's AC-3 coding and compression technology (see AC-3). Dolby Digital EX - 6.1 and 7.1 Channels Co-developed with Lucasfilm THX, Dolby Digital EX adds one or two matrixed rear center channels. Formerly "Dolby Digital Surround EX," the first film to use this enhanced version of Dolby Digital was "Star Wars: Episode I - The Phantom Menace," in 1999. Dolby Digital Plus - 6.1 and 7.1 Channels Part of the Blu-ray specification, Dolby Digital Plus supports higher bit rates than EX. Also called "DD+" and "Enhanced AC-3" (E-AC-3). Dolby TrueHD - 7.1 on Blu-ray Providing up to 14 discrete sound channels in the complete specification, TrueHD used in Blu-ray movies delivers stereo at 192 kHz and up to eight channels (7.1) at 96 kHz. Dolby TrueHD and DTS-HD are the two high-definition Blu-ray audio formats. HDMI 1.3 cables are required. See Blu-ray, DTS and HDMI. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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