Dynamic Time Warping (DTW) for Single Word and Sentence ...

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DTW for Single Word and Sentence Recognizers Approaches to Alignment of Vector Sequences • Linear alignment can handle the problem of different speaking rates • But: it can not handle the problem of varying speaking rates during the same utterance. 28
DTW for Single Word and Sentence Recognizers Alignment of Speech Vectors May Be Non-Bijective Given: two sequences x 1 ,x 2 ,...,x n and y 1 ,y 2 ,...,y m Wanted: alignment relation R (not function), where (i,j) is in R iff x i is aligned with y j . y x 1 2 3 4 5 6 7 8 9 ... 1 2 3 4 5 6 7 8 9 ... It is possible that … … more than one x is aligned to the same y (e.g. x 3, x 4) … more than one y is aligned to the same x (e.g. y 8, y 9) … more than an x or a y has no alignment partner at all (e.g. y 6) 29
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Dynamic Time Warping (DTW) for Single Word and Sentence ...

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