Dolby Digital Dolby Digital



dolby digital logo shown @ start of broadcasts, feature films, , video games



the former dolby digital logo


dolby digital common version containing 6 discrete channels of sound. elaborate mode in common use involves 5 channels normal-range speakers (20 hz – 20,000 hz) (right, center, left, right surround, left surround) , 1 channel (20 hz – 120 hz allotted audio) subwoofer driven low-frequency effects. mono , stereo modes supported. ac-3 supports audio sample-rates 48 khz.


this format has different names:



dolby digital
dd (an abbreviation dolby digital, combined channel count; instance, dd 2.0, dd 5.1)
ac-3 (audio codec 3, advanced codec 3, acoustic coder 3. [these backronyms. adaptive transform acoustic coding 3 separate format developed sony.])
atsc a/52 (name of standard)
before 1996, marketed dolby surround ac-3, dolby stereo digital, , dolby srd.

in 1991, limited experimental release of star trek 6 in dolby digital played in 3 theatres. in 1992, batman returns first movie released in dolby digital. in 1995, laserdisc version of clear , present danger featured first home theater dolby digital mix, followed true lies, stargate, forest gump, , interview vampire among others.








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