BPI-AI-Voice (Microsemi) – Speech Recognition Module

Banana Pi BPI-AI-Voice (Microsemi) is a module for speech recognition. Now, you can use it on Raspberry Pi with Amazon AVS.

Designed for world-class voice front-end applications, Microsemis new ZL38063 audio processor features the company’s AcuEdge(TM) technology. This innovative technology is a set of highly-complex and integrated algorithms that significantly improves automatic speech recognition (ASR) for both embedded and cloud-based ASR solutions. The ZL38063 delivers audio enhancements that perform noise reduction and smart automatic gain control (AGC), enabling speech recognition at distance in noisy, real-world conditions.

Key Features:

• Supports 2 or 3 microphones linear or triangular array placement for enhanced audio pick up
• Noise reduction
• Smart automatic gain control (AGC)
• High-quality stereo acoustic echo canceller for barge-in and full duplex audio
• Fully configurable and scalable solution delivering a two microphone configuration for both 180° and 360° audio pick-up
• Enhanced beam forming technology to enhance audio pick-up in adverse conditions, in presence of noise and outside sound sources
• 2-way full duplex voice communication
• Turnkey designs available as well as all appropriate drivers and documentation, along with worldwide support

BPI-AI-Voice External Interfaces

• Raspberry Pi 3/Banana Pi HeaderP2: I2S port; SPI; 8 GPIO
• Audio Header: JMMA1: digital microphones; Analog out; 3 GPIO
• SPI Flash Devices: U2: optional SPI flash component used to store ZL38063 firmware
• USB J3: Optional USB power and debug port
• Debug Headers: JAIB2/2: auto tuning headers
• Digital Microphone Headers: JM1–4: optional header for off-board microphones

Audio Characteristics

• Digital Microphones: 4 on-board digital microphones (AKU441): supports a 2 microphone configuration for 180° and 360° audio pick-up
• Analog Output: J1: 2 x 2.65 Low cost class D audio amplifier (NCP2820)

Connectors

• Stereo 3.5 mm male-to-male audio cable: P1: audio output
• MicroUSB Cable: J3: optional USB power and debug port