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Dolby Digital

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Dolby Digital

A digital audio encoding system from Dolby used in movie and home theaters. First used in 1995, Dolby Digital employs Dolby's AC-3 (Audio Coding-3) coding and compression technology and is the standard for DVD-Video and HDTV.

5.1 Channels
Dolby Digital provides five discrete channels of audio plus a subwoofer channel for low frequency effects (the "1" in the 5.1). The five channels are front left, right and center and surround left and right.

6.1 Channels - Dolby Digital Surround EX
Co-developed with Lucasfilm THX, Dolby Digital Surround EX adds a rear center speaker. The first film to use this enhanced version of Dolby Digital was "Star Wars: Episode I - The Phantom Menace," in 1999.

6.1 & 7.1 Channels - Dolby Digital Plus
Part of the Blu-ray disc specification, Dolby Digital Plus supports 6.1 and 7.1 speaker configurations at significantly higher bit rates. Also called "DD+" and "Enhanced AC-3" (E-AC-3), these formats cannot be played with standard AC-3 codecs. See Blu-ray.



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has been the name to beat in the multichannel home theater system market - its Dolby Digital AC-3, 5.
DTS MOVES THEATER SOUND TO HOUSEHOLDS by Daily News (Los Angeles, CA)
With Dolby Digital Plus now included in the DVB specifications, telecom operators can deliver the full Dolby surround sound experience at a data rate that's practical for IPTV.
Industry Group DVB Adds Dolby Digital Plus to IPTV Specifications by Business Wire
Nominees for Achievement in Sound Editing include: Apocalypto (Buena Vista) Sean McCormack and Kami Asgar Dolby Digital Blood Diamond (Warner Bros.
Dolby Employees to Receive Academy Award in Scientific and Technical ... by Business Wire
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