Desenvolvimento de um IP core de pré-processamento digital de sinais de voz para aplicação em sistemas embutidos.

Abstract

Speech is the most common way of communication used by human beings, which distinguishes it from other living beings, allowing the exchange of ideas, expression of opinions or revelation of thought. In face technology advance and consequently appearance of electronics equipments more and more sophisticated, the possibility to allow the man-machine interaction through speech have been object of interesting as to academic environment as to electronic equipment developers. Research in the area of Speech Processing has been allowing the development of Speech Synthesis Systems, Speech Recognition Systems and Speaker Recognition Systems. However, processing requirements still difficult the implementation of those systems in devices with low computational power, as mobile phone, palmtops and home equipments. This work consists of the study and adaptation of digital processing speech signals techniques, resulting in an optimized library of preprocessing including preemphasis, division into frames and windowing, allowing this use in development of speech or speaker recognition embedded applications. It was made adaptations in the models, implementation in a hardware description language, library functional verification and finally the prototyping in a hardware device.