NXP i.MX 8M Mini Pico-Pi AVS and ACM

Full-duplex, distortion-free voice on speaker phones and voice activated smart speakers, sound bars and smart home appliances. Using DSP Concepts' ACM qualified front end, the NXP i.MX 8M Mini Pico-Pi ACM and AVS reference design eliminates transmit and receive echo with low latency to provide natural voice experience. Combined with our high performance, AVS FFRS v2.1 qualified TalkTo Voice UI, this NXP design reduces tuning and certification costs with product-ready algorithms

Benefits

  • High quality, full duplex voice communication 
    • Robust to double talk, acoustic echo and distortions
    • 50+ dB echo cancellation together with AEC and Residual echo suppressor
  • Flexible Tuning Options
    • 1 mic Voice calling with advanced tuning options to trade-off between AEC and speech quality
  • Integrated Alexa voice service with 6 mic TalkTo
    • Seamlessly add Alexa to your product to activate by voice from 6m+ range
  • Reduce tuning and certification risks and costs
    • Optimized production ready algorithms 
    • Expedited hardware validation using Real-time Analysis and System Check (RTASC)
  • Rapid prototyping and accelerated product development
    • Embedded Audio Weaver Core and Audio Weaver Designer interface with drag & drop programming environment

Audio Front-end Features

  • DSP Concepts’ Voice Communication for full duplex voice calls
    • Acoustic Echo Canceller together with Residual Echo Suppression for full duplex voice quality
    • Single Channel Noise Reduction (SCNR) to eliminate stationary noises such as fan noise
    • Automatic Gain Control (AGC) for optimal hearing at the far-end
    • Receive Equalization and volume control for improved speech quality in receive direction
  • DSP Concepts’ TalkTo for excellent far-field performance in noisy environments
    • 6-mic adaptive beamformer with Single Channel Noise Reduction (SCNR)
    • State-of-the-art noise cancellation with Adaptive Interference Canceller (AIC) 
      • No reference signal needed
      • Eliminates 30dB of external noise sources such as background music or a booming movie
    • 30+ dB Acoustic Echo Cancellation (AEC) for excellent barge-in performance
  • Stereo Audio Playback processing

Software Integrations

  • Audio Weaver Designer: Drag-and-drop graphical tool to customize and tune audio processing models in real-time with 500+ modules
  • Audio Weaver Core - Embedded audio-processing engine for Cortex-A53
  • DSP Concepts’ Voice Communication front-end for full duplex voice calls
  • TalkTo Voice UI: Noise reduction, echo cancellation and advanced beam-forming signal processing for far-field voice activation
  • Stereo audio playback processing
  • Sensory TrulyHandsfree ‘Alexa’ wake word engine

Hardware Specifications

  • Processor
    • i.MX 8M Mini Quad core application processor
    • 4x Arm® Cortex®-A53 Core @ 1.8 GHz
    • 1x Arm® Cortex®-M4 @ 400 MHz
  • Memory
    • 32-bit LPDDR4 w/2 GB
    • eMMC 5.0/5.1 w/16 GB
    • SD/MMC connector
    • QSPI w/32 MB
  • Audio I/O
    • Audio DAC 24-bit 192 kHz stereo
    • HP Jack 3.5 mm audio connector
    • Board expansion connector for audio interfaces
  • Connectivity
    • 10/100/1000 Ethernet
    • USB 3.0 Type C connector
    • PCIe M.2 interface

Included with the demo kit:

  • NXP i.MX 8M Mini Evaluation kit with i.MX 8M Mini Quad applications processor
  • DSP Concepts 6-mic Circular array board
  • Microphone interposer board
  • Micro SIP VOIP client for windows PC
  • USB connectors

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