Program Overview

The solution is an offline voice control smart home solution, using four Infineon digital silicon microphones to form a linear microphone matrix to collect voice data; using XMOS XVF3000 series chips for echo cancellation, noise suppression, dereverberation, automatic gain control, 4Mic Processing of voice algorithms such as adaptive beamforming, with a pickup range of up to 180 degrees and a distance of up to 5 meters, which ultimately generates audio data suitable for voice recognition; the main control uses the MPU platform high-performance processor equipped with Linux system to process voice Identify and communicate and control sub-g nodes in the intranet to realize voice control of smart home nodes.

The main parameters

    •   Working voltage: 5V DC 2A

    •   Pickup range 180 degrees

    •   Pickup distance 5 meters

    • Offline speech recognition, offline speech synthesis

Hardware block diagram

main feature

    • XVF3XXX series using XMOS

✔ Full duplex echo cancellation

✔ 4MIC adaptive beamformer

✔ Noise suppression, reverberation, AGC

✔ Directly support PDM digital microphone connection

✔ Support USB / I2S interface

✔ 180 ° voice pickup range

✔ Pick up distance up to 5 meters

✔ Rich resources: 2MByte flash, 512KByte SRAM, 20 timers, 16 cores, computing power up to 2000MIPS

    • Use Infineon digital silicon wheat

✔ Sound pressure level of 128dB, can achieve far-field and ear voice pickup performance

✔ The signal-to-noise ratio reaches 69dB, and the extremely low distortion rate is within 1%

    •   Use high-performance MPU platform equipped with Linux system for voice algorithm processing

✔High  -performance MPU processor platform

    • Use Sub-G to interact with subnet nodes

✔ Subnet nodes include motor nodes, LED nodes and sensor nodes

Supported offline commands 

Offline commands can be customized and modified according to actual needs.

    • "Red light off", "Red light first gear", "Red light second gear", "Red light third gear", "Red light on",

    • "Green light off", "Green light first gear", "Green light second gear", "Green light third gear", "Green light on",

    • "Blue light off", "Blue light first gear", "Blue light second gear", "Blue light third gear", "Blue light on",

    • "Motor off", "Motor first gear", "Motor second gear", "Motor third gear", "Motor on",

    • "Current temperature", "Current humidity", "Air quality", "Proximity sensor"

Target application

    • Industrial control, smart home gateway, conference system voice control occasions, etc.