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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국음성학회 음성과학 음성과학 제12권 4호
발행연도
2005.12
수록면
7 - 16 (10page)

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We investigate the effect of membership concentration on the performance of the speaker-independent recognition system by FVQ/HMM. For the membership function, we adopt the result obtained from the objective function approach by Bezdek. Membership concentration is done by varying the exponent in the membership function. The number of selected clusters is constrained to two for the sake of cheap computational cost. Experimental results showed that the recognition rate has its maximum value when the membership function was taken to be inversely proportional to the distance of the input vector from the cluster centroid. When the membership concentration was two weak or too strong, the performance was found to be relatively poor as expected. Except these extreme cases, the membership concentration was not shown to affect the recognition rate significantly. This is in accordance with the general observation that the fuzzy system is not much sensitive to the detailed shape of the membership function as long as it is overlapped over multiple classes.

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ABSTRACT

Ⅰ. Introduction

Ⅱ. Theory of FVQ / HMM

Ⅲ. Experimental Setup

Ⅳ. Results

Ⅴ. Conclusion

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