Released on: October 1, 2007, 4:09 am

Press Release Author: Nataly Protopopova / GritTec laboratory

Industry: Telecommunications

Press Release Summary: GritTec\'s Dual microphone array solution of speech
enhancement is used for the suppression of external hindrances and surrounding
noises in chosen direction source of the speech. The sources of external hindrances
can be an external noise of car, speech of collocutor, music and any other sounds,
coming from directions, different from direction of the chosen source of the speech.


Press Release Body: Dual microphone array solution of speech enhancement is used for
the suppression of external hindrances and surrounding noises in chosen direction
source of the speech. The sources of external hindrances can be an external noise of
car, speech of collocutor, music and any other sounds, coming from directions,
different from direction of the chosen source of the speech. Suppression of external
hindrances is descended by mean of the acoustical beam-forming - directed diagrams
of directivity of microphone array. Acoustical beam-forming is defined by the
configuration of microphone array and methods of adaptive filtration.

Dual microphone array solution can be effectively used for audio-video conference
systems, for car audio garniture (Car Kits) or plane audio garniture.

Main advantages:
- high quality of articulation (minimum speech distortion);
- suppression of non-stationary noise;
- fast adaptation;
- using of the cheap electret microphones.

Technology was tested in real condition with using of electret microphones with
uni-direction diagram, distance between microphones is 0.05 - 0.07 meter, distance
to source of the speech is 0.7 meter.
Demonstration version of dual microphone array solution of speech enhancement is
available for test drive on GritTec laboratory website.

About GritTec
GritTec Laboratory specializes on research and development of algorithms and
technologies in the field of speech and audio processing. GritTec\'s research is
focused on speech enhancement, speech concealment, voice biometric, speech
recognition, speech synthesis and other speech and audio technologies.
URL: http://www.grittec.com

Web Site: http://www.grittec.com

Contact Details: GritTec Ltd.
Svobody str, 91 B 2
125481 Moscow, Russia Federation
Tel: +7 495 796 24 18
Email: info@grittec.com
Url: http://www.grittec.com