NCT Rolls Out ClearSpeech Technology for BlueCore3 Bluetooth Devices

10/4/2005 - Voice technology specialist, NCT, has announced the release of its ClearSpeech technology for Cambridge Silicon Radio's BlueCore3. This development will enable Bluetooth developers worldwide to benefit from NCT's noise and echo reduction technology, helping manufacturers meet consumer expectations for high quality voice-based Bluetooth devices.

With the uptake of Bluetooth for telephony headsets and hands-free car kits, the demand for technologies that can improve the communication quality of these devices is increasing dramatically. NCT's porting of its powerful ClearSpeech echo and noise reduction technology to CSR's BlueCore3-Multimedia silicon represents an important stage in their efforts to make ClearSpeech available to this emerging market.

"We are very excited about this development," said Dr Gillian Davis, Managing Director of NCT. "Our ClearSpeech echo and noise reduction for the BlueCore3 provides up to 50dB of echo cancellation and 18dB of noise reduction and can handle echo path lengths of between 8 and 32ms, offering optimum performance for both headset and hands-free applications."

The BlueCore3 is a single-chip device that integrates Bluetooth technology with a 32 MIP open platform DSP co-processor and 16-bit stereo audio codec, providing a convenient and economic means of delivering advanced signal processing solutions for Bluetooth applications.

ClearSpeech is a suite of complex, highly refined software algorithms that provide noise cancellation for human listeners, noise cancellation for voice recognition, echo cancellation and signal conditioning. By removing background noise and voice echo, ClearSpeech is able to vastly improve voice quality in a diverse range of communication systems.

Both the Bluecore3 and ClearSpeech are readily available for evaluation. Contact for further information on this evaluation platform.

NCT will be presenting their technology at 'Building The Perfect Beast', an event focused on automotive electronics to be held near Cambridge on the 15th November - visit

About NCT
Trading since 1990, Noise Cancellation Technologies (Europe) Ltd, NCT, is a world leader in the development of technologies for the removal of noise and echo from communication systems such as mobile phones, radio systems, intercoms, hands-free kits and voice recognition systems. By developing advanced software algorithms that run on DSP's (digital signal processors) and CPU's, NCT has enabled some of the world's top manufacturers to deliver high quality voice-based communication systems. NCT now has sales offices in the UK, the US and Japan.

Noise Cancellation Technologies (Europe) Ltd, is a wholly owned subsidiary of NCT Group, Inc. NCT Group, Inc. (NCTI) is a publicly-traded, high-tech company with a strong technology base. NCTI is rich in intellectual property with 578 patents and related rights.

ClearSpeech® is registered trademark owned by NCT Group, Inc.

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