Macintosh Audio Compression/Expansion: Difference between revisions
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Visitors are encouraged not to use this codec, for several reasons: | Visitors are encouraged not to use this codec, for several reasons: | ||
* There are better alternatives quality-wise (ADPCM, WavPack lossy, psychoacoustic codecs) | * There are better alternatives quality-wise (ADPCM, WavPack lossy, psychoacoustic codecs) | ||
* Proprietary codec - E.G, on Windows platform, it can only be played in QuickTime | * Proprietary codec - E.G, on Windows platform, it can only be ancoded and played in QuickTime | ||
* Won't work on bit depths other than 8bit. | * Won't work on bit depths other than 8bit. | ||
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* [http://www.quicktime.com QuickTime] plays and encodes MACE streams. | * [http://www.quicktime.com QuickTime] plays and encodes MACE streams. | ||
* [http://www.mplayerhq.hu/~michael/ffmpeg-doxy/mace_8c-source.html Reverse engineered MACE decoder] by Laszlo Torok | * [http://www.mplayerhq.hu/~michael/ffmpeg-doxy/mace_8c-source.html Reverse engineered MACE decoder sources] by Laszlo Torok | ||
Revision as of 23:37, 29 July 2005
MACE (Macintosh Audio Compression/Expansion) is a lossy, proprietary compression scheme developed by Apple Computer for their Macintosh line of computers.
Technically, it's very similar to how ADPCM works.
It offers two compression modes: 6:1 (1/6th of the original file size, 235kbps) and 3:1 (1/3rd of the original file size, 470kbps). Quality is relatively poor. It only works on 8bit streams.
Visitors are encouraged not to use this codec, for several reasons:
- There are better alternatives quality-wise (ADPCM, WavPack lossy, psychoacoustic codecs)
- Proprietary codec - E.G, on Windows platform, it can only be ancoded and played in QuickTime
- Won't work on bit depths other than 8bit.
External Links
- QuickTime plays and encodes MACE streams.
- Reverse engineered MACE decoder sources by Laszlo Torok