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Software Improves How Voice-Activated Devices Listen To You

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As voice-enabled devices continue to grow in number these days, CEVA is helping to enhance speech intelligibility and voice clarity for these devices with its new software suite ‘ClearVox’. Containing advanced voice input processing algorithms to drive the firm’s TeakLite-4 and CEVA-X2 audio/voice DSPs, the software copes with different acoustic scenarios and microphone configurations and is intended for applications like headsets and wearables, smart speaker, infotainment and other advanced voice-enabled applications.

ClearVox incorporates advanced algorithms that deal with different acoustic scenarios and microphone configurations, including optimized software for speaker direction of arrival, multi-mic beamforming, noise suppression and acoustic echo cancellation, as well as the related firmware and driver software

“As voice becomes the primary user interface for cloud-based assistant services, a clean voice signal in any given environment is mandatory to ensure accuracy and intelligibility by conversational assistants such as Alexa, Baidu’s DuerOS, Bixby, Cortana, Google Assistant and Siri”, CEVA noted.

“Headsets, smart speakers, mobile phones, wearables, automotive infotainment and home security systems are just some of the sizeable markets that vendors and chipmakers are targeting with voice-enabled services. However, they face significant technology barriers to incorporate and configure complicated algorithms such as multi-mic beamforming, multi-channel acoustic echo cancellation and noise suppression in their products”, the firm further said.

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Clearvox is offered in two pre-packaged software form factors: one for near-field applications including headsets and wearables, and the other for far-field applications targeting the emerging smart speaker, infotainment and other advanced voice-enabled applications.

The accompanying SDK is available for customers to configure and adopt ClearVox to their unique product specifications, such as the number and geometry of microphones, echo tail length and more.

Erez Bar-Niv, Chief Technology Officer at CEVA, commented: “Voice input technologies are some of the most complicated and diverse algorithms to design, yet have become a ‘must-have’ for every voice-enabled device. Our ClearVox technology takes advantage of the latest academic research in algorithms for beamforming and signal direction of arrival to achieve a truly robust and exceptionally clear voice signal, regardless of background noise, acoustics, environment or product design. Our customers can now benefit from a single-source offering for the complete voice input solution, both the DSP and the software reducing design complexity and their time-to-market.”

ClearVox is available for licensing by select customers today and for general licensing in Q2.

For more information on the ClearVox smart voice software package, visit

Click here for Press release.


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