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lecture28 - Articial Intelligence Speech Recognition(short...

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Speech Recognition; page 1 of 8 Artificial Intelligence Speech Recognition Russell and Norvig, Chapter 15.6 (short overview only)
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Speech Recognition; page 2 of 8 Analog acoustic signal: Sampled, quantized digital signal: Frames with features: 10 15 38 52 47 82 22 63 24 89 94 11 10 12 73 Frames with vector quantization values: C82 C44 C63 C25 C39 phones words (problems: segmentation, homophones) meaning 8-16 kHz 8-12 bits 10 msecs features: amount of energy in frequency ranges etc. c1 c2 c3
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Speech Recognition; page 3 of 8 Vowels Consonants B-N Consonants P-Z Phone Example Phone Example Phone Example [iy] b ea t [b] b et [p] p et [ih] b i t [ch] Ch et [r] r at [ey] b e t [d] d ebt [s] s et [æ] b a t [f] f at [sh] sh oe [ah] b u t [g] g et [t] t en [ao] b ough t [hh] h at [th] th ick [ow] b oa t [hv] h igh [dh] th at [uh] b oo k [jh] j et [dx] bu tt er [ux] b eau ty [k] k ick [v] v et [er] B er t [l] l et [w] w et [ay] b uy [el] bott le [wh] wh ich [oy] b oy [m] m et [y] y et [axr] din er [em] bott om [z] z oo [aw] d ow n [n] n et [zh] mea s ure [ax] a bout [en] butt on [ix] ros e s [ng] si ng [aa] c o t [eng] Wash ing ton
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