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DSP IP is optimized for AI speech, audio processing

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By Rich Pell


The Cadence Tensilica HiFi 5 DSP for audio and voice offers 2X audio processing and 4X neural network (NN) processing improvements compared to the HiFi 4 DSP, says the company, making it ideal for voice-controlled user interfaces in digital home assistants and automotive infotainment.

“The dramatic rise in popularity of digital home assistants that feature compelling voice UI experiences has sparked a new wave of innovation in far-field processing algorithms and in neural network-based speech recognition,” says Larry Przywara, group director of marketing, Tensilica audio/voice IP at Cadence.

“The HiFi 5 DSP addresses both of these high-performance compute concerns with improved floating- and fixed-point DSP capabilities and native support for new data types, saving memory and power.” says Przywara. “The HiFi 5 DSP maintains code compatibility with the existing HiFi DSP product line, which means a large ecosystem of audio software is already available.”

Key features of the HiFi 5 DSP include:

  • Five very long instruction word (VLIW)-slot architecture capable of issuing two 128-bit loads per cycle
  • 2X MAC capability versus HiFi 4 DSP for pre- and post-processing, includes support for eight 32×32-bit or 16 16×16-bit MACs per cycle and optional eight single-precision floating-point MACs per cycle
  • 4X MAC capability versus HiFi 4 DSP for NN processing, includes 32 16×8 or 16×4 MACs per cycle and optional 16 half-precision floating-point MACs per cycle
  • The new HiFi NN library offers a highly optimized set of library functions commonly used in NN processing (especially speech). These library functions can easily be integrated into popular machine learning frameworks.
  • Software compatibility with the complete HiFi product line totaling over 300 HiFi-optimized audio and voice codecs and audio enhancement software packages.

For more on the HiFi 5 see Tensilica HiFi DSPs for Audio, Voice, and Speech.

Cadence Design Systems


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