Low power DSP IP core for always-listening voice trigger and voice recognition

January 04, 2013 // By Julien Happich
Tensilica introduced the HiFi Mini DSP (digital signal processor) core, claimed to be the smallest, lowest power DSP IP core supporting always listening voice trigger and speech command modes.

Optimized specifically for the smallest area and lowest power in smartphones, tablets, appliances, and automotive applications, the HiFi Mini DSP IP core enables a hands-free experience. Tensilica is working with Sensory and other software partners that will provide the voice-activation, speech command recognition, voice pre-processing and noise reduction products optimized on the HiFi Mini DSP. The HiFi Mini DSP core to be as small and power efficient as possible for voice trigger and voice recognition in two major ways. First, the core uses compact 40-bit encoding, which significantly improves code size. Second, Tensilica added efficient16-bit instructions that are optimized for voice and audio codecs. The result is a post-route core that's only 0.039 mm 2 in 28 nm HPL. Using Sensory's Truly Handsfree voice control technology, HiFi Mini is able to achieve less than 88 uW of power for the core in 28 nm HPL.

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