DVD-A vs DAD

Mike Broadman

Senior HTF Member
Joined
Aug 24, 2001
Messages
4,951
Folks, I was curious as to what the technical difference is between DVD-A and DAD. Correct me if I'm wrong, but are they not both PCM 24/96? What does DVD-A do that regular DVD sound does not? Thanks.

NP: King Crimson, Moles Club, Bath, CD
 

Kevin P

Screenwriter
Joined
Jan 18, 1999
Messages
1,439
DVD-A uses Meridian Lossless Packing (MLP) encoding to provide up to 192kb/24bit PCM quality multi-channel audio.

DAD provides up to 96/24 PCM, I believe 2 channel only.

DVD-A provides higher quality multi-channel audio but only plays on DVD-A compatible players (although many discs sport PCM, Dolby Digital or DTS tracks for compatibility with standard DVD-Video players), where DAD discs should play in most/all DVD players since they just use a standard PCM track.

KJP
 

Craig F

Second Unit
Joined
Jul 5, 2001
Messages
276
Real Name
Craig
I don’t have a link handy that describes DAD, but here is some more elaboration.
DAD is not really a format. The DVD-Video spec allows for 2 channel PCM at 96kHz/24-bit. DAD is just a DVD-Video that utilizes this.
On the other hand DVD-Audio IS a format and has a different spec. DVD-Audio allows the following sample rates (kHz) 44.1, 48, 88.2, 96, 176.4, 192 at bit depths of 16, 20, 24. The 2 highest sample rates are limited to 2 channel stereo. The lower sample rates allow up to 6 full range channels. As previously noted, DVD-Audio can use MLP compression which is a lossless compression unlike DD and DTS.
For more info on DVD-Audio:
http://www.hometheaterhifi.com/volum...o-11-2001.html
 

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