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. Introduced in 2006, Dolby TrueHD competes with DTS-HD for high-definition Blu-ray audio formats. HDMI 1.3 cables are required. See Blu-ray, DTS and HDMI.

Dolby Atmos (Object Based)
Introduced in 2012, Atmos allows audio "objects" to be positioned in 3D space. For details, see Dolby Atmos.
References in periodicals archive ?
SurCode was the first Dolby Digital Encoder for Adobe Premiere Pro, released over 10 years ago," said John Schur, President of Telos Alliance TV Solutions Group.
Widespread availability of Dolby Digital Plus on Windows 8 will enable more people to enjoy cinematic sound anytime, anywhere, and on any device," he added.
Dolby Digital AC-3 sound is encoded into laserdiscs, but not on the more popular videotapes, which utilize the four-channel Dolby Surround sound.
Free high-definition Dolby Digital Plus content is available for download at www.
The licensing fee for a major feature is $40,000, compared to $10,000 for Dolby Digital and, as of 1996, under $9,000 for SDDS, which previously was available free of charge to filmmakers.
Using Dolby Digital Plus as the audio format for its infrastructure, Tata Sky can efficiently deliver a premium surround sound audio experience by satellite to its customers--a perfect complement to their HD video service.
More surround channels: Dolby Digital Plus delivers up to 7.
We support Dolby Digital Plus and Dolby Digital in our Vega family of offline Analyzers and Dolby E in our Baton content readiness offering.
As Windows 7 amplifies the entertainment experience on the PC, it makes sense that Dolby Digital Plus is selected as the audio format for delivering high-quality surround sound," said Ramzi Haidamus, Executive Vice President Sales and Marketing, Dolby Laboratories.
Dolby Digital Plus and Dolby Digital audio will allow viewers to enjoy broadcasts in 5.
In next-generation high-definition video disc players and media, Dolby Digital Plus delivers up to 7.
Dolby Volume complements Dolby Digital (AC-3), the de facto standard for surround sound in DVB-based broadcasting, as well as the audio standard for DVD-Video and for DTV broadcasting in North America.