Dolby Digital is an advanced form of digital audio coding technique that reduces the amount of data needed to produce high quality sound.
Dolby Digital delivers 6 channels in the 5.1 configuration: left, right, and center screen channels, separate left and right sounds, and a subwoofer channel. This is sometimes called surround sound or 3D sound.

Answered by Akhil K , an ibibo Advisor, at 12:44 PM on March 21, 2008

This is a method of coding digital signals developed by Dolby Laboratories, Inc. that gives movie theater ambience to a DVD video player's audio output when connected to a processor/decoder or amplifier with Dolby Digital 5.1ch or Optical (Toslink) input jacks. Using a special encoding and decoding process, Dolby Digital allows the movie producer to place full-range dialog, music, and effects anywhere in the listening environment. In order to enjoy Dolby Digital (also know as AC-3) a processor capable of decoding the digital signal must be used.

Answered by Nirmal C , an ibibo Advisor, at 12:28 PM on March 21, 2008

Dolby Digital logo that is sometimes shown at the beginning of broadcasts, feature films, and games
Dolby Digital, or AC-3, is the common version containing up to six discrete channels of sound, with five channels for normal-range speakers (20 Hz – 20,000 Hz) (right front, center, left front, right rear and left rear) and one channel (20 Hz – 120 Hz) for the subwoofer driven low-frequency effects. Mono and stereo modes are also supported. AC-3 supports audio sample-rates up to 48KHz. Batman Returns was the first film to use Dolby Digital technology when it premiered in theaters in Summer 1992. The LaserDisc version of Clear and Present Danger featured the very first Home theater Dolby Digital mix in 1995.
This codec has several aliases, which are different names for the same codec:
Dolby Digital (promotional name, not accepted by the ATSC)
DD (an abbreviation of above, often combined with channel count: DD 5.1)
Dolby Surround AC-3 Digital (second promotional name, as seen on early film releases and on home audio equipment until about 1995/1996)
Dolby Stereo Digital (first promotional name, as seen on early releases, also seen on True Lies LaserDisc)
Dolby SR-Digital (when the recording incorporates a Dolby SR-format recording for compatibility)
SR-D (an abbreviation of above)
Adaptive Transform Coder 3 (relates to the bitstream format of Dolby Digital)
AC-3 (an abbreviation of above)
Audio Codec 3, Advanced Codec 3, Acoustic Coder 3 (These are backronyms. However, Adaptive TRansform Acoustic Coding 3, or ATRAC3, is a separate format developed by Sony)
ATSC A/52 (name of the standard, current version is A/52 Rev. B)
Dolby Digital EX
Dolby Digital EX is 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. EX adds an extension to the standard 5.1 channel Dolby Digital codec in the form of matrixed rear channels, creating 6.1 or 7.1 channel output. However, the format is not considered a true 6.1 or 7.1 channel codec because it lacks the capability to support a discrete 6th channel unlike the competing DTS-ES codec.
Dolby Digital Live
Dolby Digital Live (DDL) is a real-time encoding technology for interactive media such as video games. It converts any audio signals on a PC or game console into the 5.1-channel Dolby Digital format and transports it via a single S/PDIF cable.[1] The SoundStorm, used for the Xbox game console and certain nForce2-based PCs, used an early form of this technology. Dolby Digital Live is currently available in sound cards from manufacturers such as Turtle Beach[2],HT OMEGA SYSTEM[3] and Auzentech[4] using C-Media chipsets, as well as on motherboards with codecs such as Realtek's ALC882D,[5] ALC888DD and ALC888H. A similar technology known as DTS Connect is available from competitor DTS.
An important benefit of this technology is that it enables the use of digital multichannel sound with consumer sound cards, which are otherwise limited to PCM stereo or multichannel analog.
Dolby Digital Surround EX
Dolby Digital Surround EX was co-developed by Dolby and Lucasfilm THX in time for the release in May 1999 of Star Wars Episode I: The Phantom Menace. It provides an economical and backwards-compatible means for 5.1 soundtracks to carry a sixth, center back surround channel for improved localization of effects. The extra surround channel is matrix encoded onto the discrete Left Surround and Right Surround channels of the 5.1 mix, much like the front center channel on Dolby Surround encoded stereo soundtracks. The result can be played without loss of information on standard 5.1 systems, or played in 6.1 or 7.1 on systems equipped with Surround EX decoding and additional speakers. Dolby Digital Surround EX has since been used for the Star Wars prequels on the DVD versions

Answered by Veena , an ibibo Advisor, at 12:10 PM on March 21, 2008

Dolby Digital is an advanced form of digital audio coding technique that reduces the amount of data needed to produce high quality sound.
Dolby Digital delivers 6 channels in the 5.1 configuration: left, right, and center screen channels, separate left and right sounds, and a subwoofer channel. This is sometimes called surround sound or 3D sound.

Answered by archana dhir , an ibibo Specialist, at 9:36 PM on March 12, 2008

This is a method of coding digital signals developed by Dolby Laboratories, Inc. that gives movie theater ambience to a DVD video player's audio output when connected to a processor/decoder or amplifier with Dolby Digital 5.1ch or Optical (Toslink) input jacks. Using a special encoding and decoding process, Dolby Digital allows the movie producer to place full-range dialog, music, and effects anywhere in the listening environment. In order to enjoy Dolby Digital (also know as AC-3) a processor capable of decoding the digital signal must be used.

Answered by anil kumar , an ibibo Citizen, at 12:51 AM on March 08, 2008

A standard for compressed digital audio from Dolby Laboratories. Dolby Digital encodes 5.1 channels of digital audio (Left, Right, Center, Left Surround, Right Surround, and a Base Channel).
A data compression method, otherwise known as AC-3, that uses psycho-acoustic principles to reduce the number of bits required to represent the signal. Bit rates for 5.1 channels range from 320 kbps for sound on film to 384 kbps for digital television and up to 448 kbps for audio use on DVD.

Answered by savesh singh , an ibibo Citizen, at 11:11 PM on March 07, 2008

An encoding system that digitally compresses up to 5.1 discrete channels of audio (left front, center, right front, left surround, right surround, and LFE) into a single bitstream, which can be recorded onto a DVD, HDTV broadcast, or other form of digital media.the most common surround sound format for DVD, which comes in various types featuring a number of discrete (independent) audio tracks: 1.0 is mono (ie, not surround), 2.0 is stereo but might also contain a two-channel Dolby Pro-Logic surround track, Dolby 4.0 and 5.0 (four and five channels .

Answered by yogesh , an ibibo Citizen, at 10:37 PM on March 07, 2008

Primarily under the name of AC-3,it is a digital audio coding technique that reduces the amount of data needed to produce high quality sound

Answered by Anil , an ibibo Advisor, at 6:30 PM on March 01, 2008

this is the marketing name given to company which provide support in compression technologies for audio system

Answered by Shreshtha , an ibibo Master, at 10:01 PM on February 29, 2008