IM501 voice module is a professional voice processor designed by Fu Di technology for low power wakeup.

The iM501 voice module universal speech processing module has completed the processing of the 1 channel ~4 digital voice signal.

The functions of keyword wake-up, noise reduction and echo cancellation are realized.

The product includes three parts: hardware circuit, speech processing software and parameter matching setup.

advantage

Improve the understanding of voice calls and enhance speech recognition in noisy environments.

Natural, zero distortion sound

Echo cancellation (Acoustic Echo Cancellation) provides natural full duplex dialogue.

It can work at the 16KHz sampling rate in the energy saving mode.

Hardware assisted automatic buffer for microphone, /txs and RXs data to reduce system resource consumption;

In low power wake-up mode, IM501 can use ordinary digital microphone in application environment without low power wake-up.

1. microphone input:

2., 2 or 1 smart microphones (iM205) can be connected to digital microphones instead of 1.

3. analog microphone, digital microphone can not be mixed.

4. can be connected to 5V or 3.3V or 1.8V, with LDO inside.

5. clock:

6. internally, 32.768KHz active crystal oscillator requires external 512KHz BCLK clock.

7. control port: I2C and SPI provide interface with any platform.

8. audio input / output:

9. input can be differential signal or 16K or 48K digital signal.

10. the output can be 8K or 16K digital signal, or analog signal (D/A on module).

11. cache memory: 128 Kbytes IRAM, 250 Kbytes DRAM, 96 Kbytes SRAM

12. supports multiple sampling rates: 8K/16K/24K/32K/44.1K/48KHz

It is necessary to pay attention to the reliable fixing and connection of the module board, lead wire and microphone board in order to avoid the instability or decline of the overall performance.