A number of DVDs have Dolby Digital Surround EX audio option.ĭolby Digital Live (DDL) is a real-time encoding technology for interactive media such as video games. Dolby Digital Surround EX has since been used for the Star Wars prequels on the DVD versions and also the remastered original Star Wars trilogy. The result can be played without loss of information on standard 5.1 systems, or played in 6.1 or 7.1 on systems with Surround EX decoding and added speakers. 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 Pro Logic encoded stereo soundtracks. 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. It was co-developed by Dolby and Lucasfilm THX in time for the release in May 1999 of Star Wars Episode I: The Phantom Menace. The cinema version of Dolby Digital EX is called Dolby Digital Surround EX and works similarly. 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. )ĭolby Digital EX is similar in practice to Dolby's earlier Pro-Logic format, which utilized matrix technology to add a center surround channel and single rear surround channel to stereo soundtracks.

AC-3 (Audio Codec 3, Advanced Codec 3, Acoustic Coder 3.

DD (an abbreviation for Dolby Digital, often combined with channel count for instance, DD 2.0, DD 5.1).

The LaserDisc version of Clear and Present Danger featured the first home theater Dolby Digital mix in 1995. AC-3 supports audio sample-rates up to 48 kHz. Mono and stereo modes are also supported.

The most elaborate mode in common use involves five channels for normal-range speakers (20 Hz – 20,000 Hz) (right, center, left, right surround, left surround) and one channel (20 Hz – 120 Hz allotted audio) for the subwoofer driven low-frequency effects. Dolby Digital is the common version containing up to six discrete channels of sound.

Dolby digital live and dts connect pack