A standard for digital surround sound, originally used in movie theaters, which features six channels of audio to simulate a real-life audio experience. The 5.1 refers to the number of speakers: One in the front center, two speakers to the right (front and back), two speakers to the left (front and back), and a low-frequency subwoofer (the ".1" speaker). Using this system, sounds from a source on the left side of a TV screen are heard louder (or only) through the left speakers, and so forth.
Also known as AC-3, it provides 6 channels of sound: left, center, right, left rear, right rear, and sub-woofer. It is also called "5.1 channels" since the 6th channel has reduced bandwidth. Dolby Digital 5.1 is the audio standard for all U.S. digital TV stations, most DVDs, some DBS programs, and many theaters.
A sound compression routine that compresses the 6 channel soundtrack from movies into a a single digital stream that occupies less space. The 6 channels are : front left, center, front right, rear right, rear left and a LFE channel for deep bass effects. The LFE channel is given the .1 rating, thus giving 5.1 channels of discrete CD-Quality audio.
Formerly known as AC-3, Dolby Digital® provides efficient encoding and noise reduction for high-quality surround sound(tm) applications including home entertainment, theatre and broadcasting, including DBS and DVD source material. Dolby Digital requires appreciable bandwidth, 448 Kbps being typical, a reason why it is not available for all material provided by direct broadcast satellite.
The most common sound output for DVDs. DD 5.1 sends unique signals to six different speakers: front left, front center, front right, rear left, rear right and subwoofer. To experience DD 5.1 you need a DVD player and/or a receiver than can decode the signal, or you need a DVD player with a built-in decoder and a DD-ready receiver.
A compressed 6-channel surround sound system, developed by Dolby Laboratories and originally known as AC-3. The audio is separated into front left, center, front right, rear left, rear right, and low frequency effects (deep bass only, not full frequency, hence the ".1").
Dolby Digital is the standard 5.1 channel digital audio format for DVD, HDTV, some Laserdiscs, and Direct TV broadcasts. It has six discrete digital audio channels, five full-bandwidth channels and one subwoofer or low frequency effects (LFE) channel.
This refers to on-board Dolby Digital decoding. In order to enjoy Dolby Digital tracks there must be a decoder in the audio system - be it as part of the amplifier, as a separates unit or as part of the DVD player. Those with Dolby Pro-Logic systems that are upgradeable can use these players to take advantage of Dolby Digital soundtracks.
Dolby Digital provides five full-bandwidth channels, front left, front right, centre, surround left, and surround right, for true surround sound quality. A low frequency effect (LFE) channel is included that provides the sound needed for special effects and action sequences in movies. The LFE channel is one-tenth of the bandwidth of the other channels and is sometimes erroneously called the subwoofer channel. This multichannel scheme is known as 5.1 channel.
This program features a discrete 5.1 (5 speakers + subwoofer) channel soundtrack encoded to an AC-3 bitstream. When played through Dolby Digital equipment, discrete sound will be heard from all five system speakers and the subwoofer.
The disc features a discrete 5.1 channel soundtrack encoded to an AC-3 Bitstream. When played through an AC-3 amplifier audio will be heard from all five speakers and a subwoofer, the (.1 channel).