AAC
From Just Solve the File Format Problem
AAC (Advanced Audio Coding) is a compressed audio format defined in MPEG-2 Part 7 (ISO/IEC 13818-7), and in an updated form in MPEG-4 Part 3 (ISO/IEC 14496-3). It was designed to be the successor to MP3.
An AAC file may contain only the raw AAC format, or it may use a multimedia container format such MP4 or QuickTime. AAC is often used for the audio component of a video file.
Contents |
Identifiers
Raw AAC files typically use the file extension .aac. In formats based on ISO Base Media File Format, the brand "M4A " is used.
| Format | LoCFDD |
|---|---|
| AAC (MPEG-2) | fdd000036 |
| AAC (MPEG-2), ADIF | fdd000112 |
| AAC (MPEG-4) | fdd000114 |
| AAC (MPEG-4) Low Complexity Object | fdd000233 |
| MPEG-4 File Format, V.2, with AAC | fdd000234 |
| QuickTime Audio, AAC Codec | fdd000110 |
Specifications
- ISO/IEC 13818-7:2006 (MPEG-2 Part 7) (not free to download)
- ISO/IEC 14496-3:2009 (MPEG-4 Part 3) (not free to download)
Software
Sample files
- http://download.wavetlan.com/SVV/Media/HTTP/http-aac.htm
- http://samples.libav.org/A-codecs/AAC/
- http://samples.libav.org/A-codecs/suite/MP4A
