Dolby Digital is a system capable of multi channel digital audio, coded using technology previously known as AC-3, often abbreviated as DD.

Dolby technologies put you in the center of your movie-going experience. You will hear five full-range discreet channels, plus a subwoofer channel that coves the bottom one-tenth of the audible range - these are the technologies that create the experience. The dynamic range (the ratio of the loudest sounds to the softest) is significant and the full-range surround channels make lifelike special effects possible-think helicopters flying overhead.

Dolby® Digital technology is an advanced form of digital audio coding that makes it possible to store and transmit high-quality digital sound far more efficiently than was previously possible. First used in movie theaters in 1992, Dolby Digital technology is the result of decades spent by Dolby Laboratories developing signal-processing systems that exploit the characteristics of human hearing.

Dolby Digital programs can deliver surround sound with up to five discrete full-range channels: Left, Center, Right, Left Surround, Right Surround-plus a sixth channel for powerful low-frequency effects. As it needs only about one-tenth the bandwidth of the others, the LFE channel is referred to as a ".1" channel (and sometimes erroneously as the "subwoofer" channel).

Discs in countries such as the US that use the NTSC broadcast TV standard must provide at least one soundtrack in either of two formats: Dolby Digital or PCM (the format used on CDs). In countries using the PAL TV standard, including much of Europe, the discs must include at least one soundtrack in any one of three formats: Dolby Digital, PCM, or MPEG. Due to these requirements and the options they permit, not all discs may have Dolby Digital soundtracks.

Dolby digital is a sound format featuring six-channel sound with separate left and right sounds and a low frequency-effects channel. Dolby digital is a standard when it comes to sound formats for DVDs, set-top boxes, etc.

Yes. We support the latest Dolby Digital technology. Customers will need a Dolby Digital receiver with a coaxial digital input.

The technology behind 5.1-channel Dolby Digital provides two surround channels, instead of the one from Dolby Surround, for more precise localization of sounds and a more convincing, realistic ambience. Also, Dolby Digital's surround channels cover the entire audible range (20 Hz-20,000 Hz), whereas the range of Dolby Surround's single surround channel is limited (100 Hz-7,000 Hz). The increased range of Dolby Digital further heightens realism and gives sound mixers more creative freedom.

The series is being mixed to Dolby Digital 5.1 for future DVD release, but the BBC1 and BBC3 broadcasts are only in stereo surround sound as the BBC can't transmit in Dolby Digital 5.1 yet.

Make sure you are using an S/PDIF connection, and that, in the Settings category, you select Dolby Digital under Audio Output

Consumer grade DVD recorders all have the ability to play back all Dolby Digital and DTS source material, when used with an AV receiver. However, DVD recorders only have analog stereo audio inputs for recording audio, which is then encoded into two-channel Dolby Digital. The output of the recorded audio can be accessed either through the analog stereo outputs or the digital audio outputs of the DVD recorder. Although, DVD recorders cannot record in 5.

is a generic description of a multi-channel sound system. All of these surround sound types use 5.1 channel decoding to provide surround sound....

Dolby Digital can be enjoyed via DVDs, DVD recordable and playback discs for computers, laser discs, digital cable systems, direct broadcast satellite (DBS) and direct-to-home (DTH) systems, and digital broadcast television (DTV/DVB). Sources are usually identified with the Dolby Digital logo.

No. Dolby Digital soundtracks can provide anything from mono to full 5.1-channel surround sound. DVDs of movies can even carry multiple versions of the soundtrack that differ in number of channels. A disc might contain a 5.1-channel sound mix with the dialogue in one language, a two-channel mix encoded in Dolby Surround in another language, and a mono track with the director's comments or other supplementary information.

Digital cable television systems can provide you with another source of programming for Dolby Digital playback. The number of channels with Dolby Digital cable transmissions varies as with DTV broadcasts and other Dolby Digital program sources.

Dolby Surround? is the earliest form of surround sound. It is a three-channel process meant to recreate a theatre experience. The Dolby stereo track is channelled into the front left and front right speakers. A mono signal is created electronically by comparing the differences between the left and right stereo signal. This is then fed to both rear speakers. Dolby Pro Logic? is an advanced version of Dolby Surround, adding a centre channel speaker for music and effects.

with Dolby Digital program material, "Dolby Digital" on a component such as a DVD player indicates that it incorporates Dolby Digital decoding, but not the number of channels. Many program sources, including all DVD players and digital cable set-top boxes, provide a built-in, two-channel Dolby Digital decoder with analog stereo outputs (see question 7). For 5.

This depends entirely on you sound card or decoder card. If either of these have SP/DIF digital out it should be possible in theory to output a digital signal to an appropriate amplifier. Sound card like the Sound Blaster Live (Full) and some versions of the Vortex 2 cards have suitable SP/DIF out's, as do most dedicated decoder cards such as the Real magic Hollywood + cards. You may need to look in the manuals for your kit for instructions on how to connect things together.

A numerical expression of the relationship of width to height of a TV picture. 4:3 refers to the aspect ratio of a conventional TV screen with the ratio of "4" unit width to "3" unit height regardless of the actual size of the screen. 16:9 refers to the aspect ratio of wide screen DTV formats - typically HD is 16:9.

Surround sound systems require a number of additional speakers arranged around the room. Discs are formatted so that different speakers play different sounds from a variety of sound “channels” resulting in a surround effect. Those without multiple speaker sound systems shouldn’t have a problem playing any encoded discs, although the benefits will not necessarily be apparent without the correct equipment.

No. You can get started with just a DVD player. DVD players have regular right and left stereo analog output jacks. Simply connect them to an A/V receiver with Dolby Pro Logic or Dolby Surround for surround sound. Also, many DVD players come with Virtual Surround, which creates surround sound with just your 2 speakers, and they don't even need Dolby Pro Logic or surround. The best part is, when you decide to go digital, you can easily upgrade to a Dolby Digital decoder and 6-speaker package.

Dolby Digital AC-3 is a technology developed by Dolby Laboratories that allows us to store much more CD-quality audio in much less space than traditional CD-audio. Dolby Digital also allows us to present soundtracks in the home that offer a complete surround sound experience, just like at the movie theatre, with left, centre, and right channels, stereo surround channels and a subwoofer.

To receive the 5.1-channel soundtrack on programs such as the Dolby Digital-encoded theatrical films broadcast by DIRECTV on its pay-per-view channels, you need a new satellite receiver that provides a Dolby Digital output (the "Digital" output on conventional satellite receivers does not handle Dolby Digital signals). As with other Dolby Digital components, you connect the Dolby Digital coaxial or optical output to a digital input on your Dolby Digital decoder unit.