The Age of the Voice UI

Blending a neural network (NN) with digital signal processing, the Cadence® Tensilica® HiFi 5 DSP easily executes the two complementary aspects of speech recognition: audio pre-processing and speech recognition/keyword detection. Voice-controlled appliances, whether in the home or in automobiles, can achieve rich voice interactions with the HiFi 5 DSP's leading-edge performance.

Key Benefits

Highest Neural Network Performance

4X performance of HiFi 4 DSP

Highest DSP performance

2X performance of HiFi 4 DSP

Highest codec performance

Complex object-based codecs

ISO 26262 Compliant

Certified as ASIL-compliant and equipped with both hardware and software safety mechanisms

Target Applications

  • Digital assistant​
  • Complex DSP and NN-based audio and speech processing​​
  • Well suited to TVs, soundbars, automotive, and smart speaker​ applications


  • Two 128-bit loads per cycle 
  • 2X MAC capability versus HiFi 4 DSP for pre- and post-processing
  • 4X MAC capability versus HiFi 4 DSP for NN processing, includes 32 16x8 or 16x4 MACs per cycle
  • Optional eight single-precision floating-point MACs per cycle". Update as: "8 single-precision floating-point MACs per cycle (optional)
  • Optional 16 half-precision floating-point MACs per cycle". Update as: "16 half-precision floating-point MACs per cycle (optional)
  • HiFi NN library offers a highly optimized set of library functions commonly used in NN processing (especially speech), which can easily be integrated into popular machine learning frameworks
  • Software compatibility with the complete HiFi DSP product line, totaling over 300 HiFi-optimized audio and voice codecs and audio enhancement software packages


VLIW Slots 5


Fixed-Point MACs per Cycle

32x32 8
24x24 8
32x16 16
16x16 16
Accumulator 64/ 72-bit
FPU (Optional) 2 Integrated 2-way SIMD Vector FPU
ITU Intrinsic Support Yes
Circular Buffer Support 3
Bitstream VLE/VLD Yes
User-Defined Instructions Yes
Additional Features
32 MACS/ cycle NN MACs (optional)
Half precision FPU


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