Difference between revisions of "Macintosh Audio Compression/Expansion"
From Hydrogenaudio Knowledgebase
m |
m (Oops! Bitrate values were calculated on a 16bit base...) |
||
| Line 3: | Line 3: | ||
Technically, it's very similar to how [[ADPCM]] works. | Technically, it's very similar to how [[ADPCM]] works. | ||
| − | It offers two compression modes: 6:1 (1/6th of the original file size, | + | It only works on 8bit streams. It offers two compression modes: 6:1 (1/6th of the original file size, 117kbps) and 3:1 (1/3rd of the original file size, 235kbps). Quality is relatively poor. |
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 | + | * Proprietary codec - E.G, on Windows platform, it can only be encoded and played in QuickTime |
* Won't work on bit depths other than 8bit. | * Won't work on bit depths other than 8bit. | ||
Revision as of 19:14, 23 September 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 only works on 8bit streams. It offers two compression modes: 6:1 (1/6th of the original file size, 117kbps) and 3:1 (1/3rd of the original file size, 235kbps). Quality is relatively poor.
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 encoded 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
