5707 3 Speech Rec

5707 3 Speech Rec
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  Ch3: Speech Recognition An example of a speech recognition system Audio signal processing Ch3. , v.3a 1  Audio signal processing Ch3. , v.3a 2 Overview  (A) Recognition procedure  (B) Dynamic programming  Audio signal processing Ch3. , v.3a 3 (A) Recognition Procedures  Preprocessing for recognition  endpoint detection  Pre-emphasis  windowing  distortion measure methods  Comparison methods  Vector quantization  Dynamic programming  Hidden Markov Model  Audio signal processing Ch3. , v.3a 4 LPC processor for a 10-word isolated speech recognition system Steps 1. End-point detection 2. Pre-emphasis -- high pass filtering 3. (3a) Frame blocking and (3b) Windowing 4. Auto-correlation analysis 5. LPC analysis, 6. Find Cepstral coefficients, 7. Distortion measure calculations
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