Implementation of a Speech Recognition System in a DSC

A. ALVAREZ; D. EVIN; S. VERRASTRO

Córdoba

Workshop; XVI Reunión de Trabajo en Procesamiento de la Información y Control; 2015

Facultad de Ciencias Exactas, Físicas y Naturales de la Universidad Nacional de Córdoba y la Universidad Tecnológica Nacional, Facultad Regional Córdoba

This paper describes the development and validation of an Embedded Isolated Word Recognition System (IWR) for the Argentinian Spanish language, implemented on the STM32F4-Discovery platform. Its front-end extracts Mel Frequency Cepstral Coefficients (MFCC), while its classification step is based on the Dynamic Time Warping (DTW) algorithm. Since the system was conceived as a base platform for the research and development of speech based command and control applications, it was designed to be modular and to meet real-time performance. The system includes a Real Time Operating System (RTOS) to manage various processing and control tasks, which can be easily reconfigured with different acquisition, processing and recognition parameters using a single file. The validation was done using a scenario of robotic control, achieving performance rates which demonstrates the practical usefulness of the system.