- Extension
- .aac
- .sph
- Format
- Binary
- Binary
- Category
- Audio
- Audio
- Developer
- Bell Labs, Fraunhofer Institute, Dolby Labs, Sony and Nokia
- NIST
- Description
- Compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.
- Waveform audio file created in the NIST SPHERE format, which is often used in speech recognition research; often contains a recording of a person speaking; can be provided as input to speech recognition systems.
- MIME Type
- audio/x-aac
- audio/x-nist-sph
