Our audio processing technologies are the result of over 26 person-years of research into the most effective approaches for extracting clean speech signals in complex acoustic environments. Our flexible software only solutions can enable assistive listening capabilities on multi-microphone devices including smartphones. They are also ideal for real-time applications such as video recording and calling on smartphones, VoIP calling, conference systems and automotive infotainment.
Our proprietary blind source separation technology is the foundation of our aiso™ solutions. Our blind source separation leverages Bayesian statistical models to process multi-microphone audio signals and separates each source of sound with a consistent spatial location into its own distinct channel of audio.
Acoustic Echo Cancellation or AEC cancels loudspeaker signals from the audio captured by a device’s microphones, allowing you to communicate without being tripped up by echoes.
Our AEC technology:
Our AEC technology can be configured in a variety of ways to optimise it for specific applications, including standard configuration, no reference signal or asynchronised signal.
Modular, multi-device conferencing products have their microphones and speakers integrated into separate physical devices that use separate sampling clocks, for example:
This results in the reference signal being created on one device, while the microphone signal is created separately on another device. This results in asynchronous signals.
While such asynchronous signals would pose a problem to standard AEC technologies, our AEC can be configured to be resilient to this, making it the ideal solution for modular, multidevice conferencing systems.
Noise suppression technology reduces stationary and transient noise in speech signals, enabling it to increase the signal-to-noise ratio and reduce listening fatigue.
One of the most popular configurations of our noise suppression technology functions with a very low latency of just 1 millisecond, meeting the strict latency demands of face-to-face communications for hearing assistance applications.
The low latency configuration of our noise suppression is optimised to work in harmony with our audio source separation technology, enabling it to suppress not only ambient noise but also the residual noise from interfering sound sources.
Once our blind source separation has separated out the sound sources, our source selection technology enables just the desired sound sources to be kept, while interfering sound sources are discarded.
Desired or ‘target’ sound sources can be selected in a number of ways: