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speaker, room acoustics, noise, microphone

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word string

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speaker, room acoustics, noise, microphone

speaker, room acoustics, noise, microphone

Automatic Speech Recognition

word string

language model can include semantics hypotheses

time align, pattern match utterance

local match probability estimation

front end signal processing and feature extraction noise

global decoder

x n x n x n

3 2

p(q | q )

2 1

p(q | q )

q 2

q 1 q 3

p(q | q )

1 1 p(q | q ) p(q | q )

2 2 3 3

1

p(x | q )

2 p(x | q )

p(x | q ) n n n 3

P(phone | acoustic vectors)

Acoustic Vectors

g = p g

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<F > = p(1-g)

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dV

x _n x _n x _n

q 1 q ₃

p(x | q ) _n n n 3

<F > = (1-p)g ₂