Audio Preprocessing System Reference Design for Voice-Based Applications


Design files


This reference design uses multiple microphones, a beamforming algorithm, and other processes to extract clear speech and audio amidst noise and other clutter.  The rapid increase in applications that are used in noise-prone environments for voice activated digital assistants creates demand for systems that extract clear voice from noisy environments.  The TIDEP-0099 reference design uses a microphone array and a sophisticated signal processing to extract clear audio from noisy environments.

  • Single digital signal processor (DSP) SoC for audio pre-processing
  • Circular Microphone Board (CMB) with 360 degree coverage of audio source
  • Audio preprocessing software
  • Hardware and software solution with modularized components to build an audio preprocessing solution for clear voice triggering and recognition
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUD76A.PDF (12850 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Detailed overview of design layout for component placement

TIDRQT7.ZIP (18998 K)

Files used for 3D models or 2D drawings of IC components

TIDCDE5.ZIP (6085 K)

Design file that contains information on physical board layer of design PCB

TIDRQT6.ZIP (10228 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Digital signal processors (DSPs)

TMS320C6655High performance single-core C66x fixed and floating-point DSP- up to 1.25GHz

Data sheet: PDF | HTML
Digital signal processors (DSPs)

TMS320C6657High performance dual-core C66x fixed and floating-point DSP- up to 1.25GHz, 2 UART

Data sheet: PDF | HTML
Digital signal processors (DSPs)

TMS320C6747Low power C674x floating-point DSP- 456MHz, PBGA

Data sheet: PDF | HTML
Audio ADCs

PCM1864103dB 4-Channel Software-Controlled Audio ADC With Universal Front End

Data sheet: PDF | HTML

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Evaluation board

TMDSOSKL137 — OMAP-L137/TMS320C6747 Floating Point Starter Kit

The OMAP-L137/TMS320C6747 Floating-Point Starter Kit, developed jointly with Spectrum Digital Inc., is a low-cost development platform designed to speed the development of high-precision applications based on TI's OMAP-L13x applications processors and TMS320C674x fixed-/floating-point DSPs (...)

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Technical documentation

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Type Title Date
* Design guide Audio Pre-Processing System Reference Design for Voice-Based Applications Usin (Rev. A) Jul. 06, 2017
VID Voice Preprocessing Demo on C6747 Sep. 01, 2017
More literature Emulation Wiki -- In-depth technical and "how-to" articles, FAQs, etc. Mar. 24, 2011

Related design resources

Software development

TELECOMLIB Telecom and Media Libraries - FAXLIB, VoLIB and AEC/AER for TMS320C64x+ and TMS320C55x Processors

Reference designs

TIDA-01454 PCM1864-Based Circular Microphone Board (CMB) Reference Design

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