An HMM-based speech recognition IC.

Han Wei.Thesis (M.Phil.)--Chinese University of Hong Kong, 2003.Includes bibliographical references (leaves 60-61).Abstracts in English and Chinese.Abstract --- p.i摘要 --- p.iiAcknowledgements --- p.iiiContents --- p.ivList of Figures --- p.viList of Tables --- p.viiChapter Chapter 1 --- Introduction --- p.1Chapter 1.1. --- Speech Recognition --- p.1Chapter 1.2. --- ASIC Design with HDLs --- p.3Chapter Chapter 2 --- Theory of HMM-Based Speech Recognition --- p.6Chapter 2.1. --- Speaker-Dependent and Speaker-Independent --- p.6Chapter 2.2. --- Frame and Feature Vector --- p.6Chapter 2.3. --- Hidden Markov Model --- p.7Chapter 2.3.1. --- Markov Model --- p.8Chapter 2.3.2. --- Hidden Markov Model --- p.9Chapter 2.3.3. --- Elements of an HMM --- p.10Chapter 2.3.4. --- Types of HMMs --- p.11Chapter 2.3.5. --- Continuous Observation Densities in HMMs --- p.13Chapter 2.3.6. --- Three Basic Problems for HMMs --- p.15Chapter 2.4. --- Probability Evaluation --- p.16Chapter 2.4.1. --- The Viterbi Algorithm --- p.17Chapter 2.4.2. --- Alternative Viterbi Implementation --- p.19Chapter Chapter 3 --- HMM-based Isolated Word Recognizer Design Methodology …… --- p.20Chapter 3.1. --- Speech Recognition Based On Single Mixture --- p.23Chapter 3.2. --- Speech Recognition Based On Double Mixtures --- p.25Chapter Chapter 4 --- VLSI Implementation of the Speech Recognizer --- p.29Chapter 4.1. --- The System Requirements --- p.29Chapter 4.2. --- Implementation of a Speech Recognizer with a Single-Mixture HMM --- p.30Chapter 4.3. --- Implementation of a Speech Recognizer with a Double-Mixture HMM --- p.39Chapter 4.4. --- Extend Usage in High Order Mixtures HMM --- p.46Chapter 4.5. --- Pipelining and the System Timing --- p.50Chapter Chapter 5 --- Simulation and IC Testing --- p.53Chapter 5.1. --- Simulation Result --- p.53Chapter 5.2. --- Testing --- p.55Chapter Chapter 6 --- Discussion and Conclusion --- p.58Reference --- p.60Appendix I Verilog Code of the Double-Mixture HMM Based Speech Recognition IC (RTL Level) --- p.62Subtracter --- p.62Multiplier --- p.63Core_Adder --- p.65Register for X --- p.66Subtractor and Comparator --- p.67Shifter --- p.68Look-Up Table --- p.71Register for Constants --- p.79Register for Scores --- p.80Final Score Register --- p.84Controller --- p.86Top --- p.97Appendix II Chip Microphotograph --- p.103Appendix III Pin Assignment of the Speech Recognition IC --- p.104Appendix IV The Testing Board of the IC --- p.10