Dolby Digital er markedsnavnet for en serie av lydkompresjon (audio compression) teknologier av Dolby Laboratories.


Dolby Technologies in Packaged Media Formats

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HD DVD Blu-ray DVD DVD-Audio
Codec Player support Channels (max) Max Bit Rate Player support Channels (max) Max Bit Rate Player support Channels (max) Max Bit Rate Player support Channels (max) Max Bit Rate
Dolby Digital Mandatory 5.1 448 kbit/s Mandatory 5.1 640 kbit/s Mandatory 5.1 448 kbit/s Optional in video zone for playback compatibility on DVD-Video players 5.1 448 kbit/s
Dolby Digital Plus 7.1 3 Mbit/s Optional 7.1 1.7 Mbit/s N/A
Dolby TrueHD 8 18 Mbit/s 8 18 Mbit/s

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