Artificial Bandwidth Extension (ABWE)
Artificial Bandwidth Extension (ABWE)
Voice Communication via Phone is Limited
- Only frequencies form 300 to 3400 Hz are transmitted (narrowband speech)
- HD-voice (50...7000 Hz) arising, but limited distribution in many use cases
Artificial Bandwidth Extension (ABWE)
- Receiver-side technique if communication link limited to narrowband
- Estimates HD-voice from narrowband speech
- Uses statistical estimation methods based on the source-filter model of speech production
- Improved quality and intelligibility
For Headphones, Hearing Aids, Hearables, Conference Bridges
Audio Examples
Our offer
Algorithms
- State-of-art artificial bandwidth extension implementation on request
Services
- Suitability analysis of integration possibilities
- Adaptation of estimation models
Literature
[jax03a]
Peter Jax and Peter Vary
On Artificial Bandwidth Extension of Telephone Speech
Signal Processing, August 2003
[geiser08a]
Bernd Geiser and Peter Vary
High Rate Data Hiding in ACELP Speech Codecs
Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), March 2008
[heese12]
Florian Heese, Bernd Geiser, and Peter Vary
Intelligibility Assessment of a System for Artifical Bandwidth Extension of Telephone Speech
Proceedings of German Annual Conference on Acoustics (DAGA), March 2012
[schlien16]
Thomas Schlien and Peter Vary
Künstliche akustische Bandbreitenerweiterung: Spektrale und temporale Einhüllende
Proceedings of German Annual Conference on Acoustics (DAGA), March 2016