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NXP adopts ultra-low power ASR, takes on 'always on' tech

Posted: 26 Feb 2014  Print Version  Bookmark and Share

Keywords:NXP  Rubidium  DSP  ASR 

NXP, together with Rubidium, has leveraged its CoolFlux DSP ultra-low power licensable core with the Israeli vendor's multilingual Automatic Speech Recognition (ASR) and always-listening Voice Trigger engine.

This move to integrate Rubidium's technology is said to challenge the low power audio technology previously championed by UK chip and audio software developer Wolfson Microelectronics through a deal with Sensory this time last year. Accordingly, NXP licensees are given access to hands free voice trigger as well as speech recognition capability with beam forming, barge-in capability and other voice user interface functionalities.

NXP CoolFlux Licensing director Johan Van Ginderdeuren said, "As an example, with only 0.5MIPs in the quiet listening mode and 4MIPs in the active trigger word recognition mode, we expect Rubidiums Voice Trigger to typically consume only 28µW on the CoolFlux DSP sub-system using an ULP 90nm library. This frees up resources for other activities on the DSP and minimises power consumption while being always on. In addition, the small memory footprint provides for extended Rubidium functionalities such as biometric speaker verification."

Rubidium has been working on embedded speech processing technology for mobile devices, domestic appliances and consumer applications since 1995 and has over 50 million products in the market. The small-footprint multilingual voice user interface solutions include TTS, ASR, Voice Trigger, speech compression and playback as well as biometric speaker verification.

"Rubidium's ULP micro-embedded voice trigger and speech recognition draws considerably less power than other embedded product offerings, hence is a perfect fit for the NXP's ULP CoolFlux DSP combining best of both low power worlds. One of the immediate benefits to CoolFlux DSP's developer base is the availability of a truly hands free voice user interface combined with low power consumption and very small memory profile," added Rubidium CEO and founder Shlomo Peller.

- Nick Flaherty
  EE Times Europe





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