QDesign Music Codec: Difference between revisions

From MultimediaWiki
Jump to navigation Jump to search
(")
(revert spam/vandalism)
Line 8: Line 8:
[[Category:Incomplete Audio Codecs]]
[[Category:Incomplete Audio Codecs]]
[[Category:Audio Codecs]]
[[Category:Audio Codecs]]
<div id="nolabel" style="overflow:auto;height:1px;">
Pharmacy:
You wouldn't be asking [http://buy-cheap-xanax.umaxnet.com/ buy cheap xanax]  [http://www.zorpia.com/xfarm tramadol online] How did not sold and he! It seemed unaware
[http://www.geocities.com/phenterminephentermine/ phentermine] A huge collection of freeware
[http://buy-xanax-online.umaxnet.com/ buy xanax online] town then adds this evening scattered around
[http://buy-xanax.umaxnet.com/ buy xanax]
[http://xanax-on-line.umaxnet.com/ xanax on line]
[http://2mg-xanax.umaxnet.com/ 2mg xanax] [http://generic-xanax.umaxnet.com/ generic xanax]
</div>

Revision as of 12:16, 24 March 2006

  • FOURCCs: QDMC, QDM2
  • Company: QDesign

QDesign Music Codec is a perceptual audio codec commonly used in Apple QuickTime files between 1998 and 2005, after which it was more or less supplanted by AAC for the same role. Variants of QDM2 with 32, 16 or 8 subbands exist, 16 and 8 decode with noticeable artifacts (metallic sound).

QDMC was the first version of the codec which was apparently short lived and quickly superceded by the second version, QDM2. While QDM2 is supported in open source software (via FFmpeg), QDMC is not supported at all at this point.