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DSP supports Bluetooth, sensing on a single core

02 May 2014

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CEVA Inc. announced that the CEVA-TeakLite-4 DSP is now handling the processing load of Bluetooth, in addition to audio, voice, and sensing technologies, thereby dramatically lowering the cost, complexity and power consumption of chip designs targeting smartphones, the Internet of Things (IoT), wearables, and wireless audio devices.

Leveraging new instructions and interfaces added to the recently introduced multi-functional CEVA-TeakLite-4 v2 architecture, the DSP now runs CEVA-Bluetooth connectivity (Classic or Low Energy) in addition to a broad range of audio and voice software packages, 'always-on' user interface (UI) functions such as voice triggering and face activation, and a full suite of sensor-fusion capabilities, all on a single core.

The Internet of Things comprises a multitude of devices, technologies, and form factors, with many use cases and requirements. The CEVA-TeakLite-4 specifically targets user-centric IoT devices, where natural user interface, audio playback, and voice communication represent key attributes of the device. This can include for example, voice activation, face triggering, and other 'always-on' functionality in a smartphone, smart watch, smart home controller, or wireless speakers.

 CEVA TeakLite4 target applications

CEVA TeakLite4 target applications

The ultra-low power nature of the CEVA-TeakLite-4 DSP ensures that these 'always-on' features consume minimal battery life. All of this functionality can run concurrently on the DSP without the need for a host CPU, reducing the die size and lowering power consumption of the overall device. Illustrating this, a real-life use case implementing Bluetooth Low Energy, always-on UI and sensor fusion on the CEVA-TeakLite-4 DSP requires less than 150K gates and consumes less than 150uW when implemented in a 28nm process.


The CEVA-TeakLite-4 is now capable of supporting the following on a single core:

* Bluetooth 4.1 (Classic and Low Energy)

* Always-on functionality e.g. voice trigger, face detection

* HD audio playback and post-processing

* Voice communication and noise-reduction

* Sensor fusion (context awareness)

* Android Multimedia Framework (AMF), supporting the offload of various processing elements from the CPU onto the DSP under an Android OS (including KitKat)

In addition, CEVA-TeakLite-4 also offers customers ample headroom to add functionality such as GNSS navigation and Wi-Fi connectivity, or add proprietary / third party software to further differentiate their solution.




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