Desarrollo de filtros digitales de procesamiento de voz para el laboratorio de TPS utilizando Raspberry PI y Matlab-Simulink

Abstract

This project aims to develop a digital filter system for voice signals using MATLAB- Simulink together with a Rasberry Pi, in order to improve the TPS Signal Processing laboratory of the university, through this integration will be carried out the processing of audio files or captures in real time via a USB microphone, which is vital for the practical study of the behavior of signals in the range of 0 to 4kHz, which corresponds to the human voice. This will be very useful for students as it allows a more dynamic and real learning in the design of filters such as low-pass, high-pass and notch. The signal is processed through blocks in Simulink, which are loaded into the Raspberry Pi for direct execution, and the signal can be visualized through graphical blocks such as Scope and analyze its spectrum. The filters are programmed by means of functional diagrams which makes the work more intuitive, additionally you can listen to the system output in real time using the alsa playback block connected to the board. The control and modification of the filter parameters is within the reach of users with basic knowledge of MATLAB, which makes this system flexible, educational and low cost for learning in the area of voice signal processing.