A mixed excitation vocoder with fuzzy logic classifier

The aim of this thesis work is to explore the use of fuzzy systems in a speech coding and classification application. A mixed excitation LPC based speech coder is developed. The excitation classifier for the speech coder is then implemented using a fuzzy system. The fuzzy logic based classifier determines the type of excitation to be used in constructing the synthetic speech. The results of various implementations of this speech coder are presented for comparison. This work demonstrates that a fuzzy system can be developed and implemented for a classification problem. http://archive.org/details/amixedexcitation1094523960 Lieutenant, United States Coast Guard Approved for public release; distribution is unlimited.