Adaptive Transform Acoustic Coding
Sign in to saveAdaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony. MiniDisc was the first commercial product to incorporate ATRAC, in 1992. ATRAC allowed a relatively small disc like MiniDisc to have the same running time as a CD while storing audio information with minimal perceptible loss in quality. Improvements to the codec in the form of ATRAC3, ATRAC3plus, and ATRAC Advanced Lossless followed in 1999, 2002, and 2006 respectively.
Key facts
- File format.icon
- Atrac.svgclass=skin-invert
- File format.icon_size
- 200px
- File format.extension
- .aa3, .aea, .at3, .at9, .atp, .hmaOpenMG container .oma, .omg
- File format.owner
- Sony Corporation
- File format.genre
- Audio
- File format.open
- No
- File format.free
- No
via Wikipedia infobox
Article
12 sectionsContents
- History
- Bitrate quality
- Performance
- Formats
- ATRAC (1) (versions 1.0–4.5, Type R/S)
- ATRAC3 (LP2 and LP4 Modes)
- ATRAC3plus
- ATRAC Advanced Lossless
- ATRAC9
- See also
- References
- External links
Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony. MiniDisc was the first commercial product to incorporate ATRAC, in 1992. ATRAC allowed a relatively small disc like MiniDisc to have the same running time as a CD while storing audio information with minimal perceptible loss in quality. Improvements to the codec in the form of ATRAC3, ATRAC3plus, and ATRAC Advanced Lossless followed in 1999, 2002, and 2006 respectively.
Files in ATRAC3 format originally had the extension; however, in most cases, the files would be stored in an OpenMG Audio container using the extension . Previously, files that were encrypted with OpenMG had the extension, which was replaced by starting in SonicStage v2.1. Encryption is no longer compulsory as of v3.2.