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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국음성학회 음성과학 음성과학 제11권 2호
발행연도
2004.6
수록면
193 - 210 (18page)

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초록· 키워드

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In this paper, we develop a real time lip-synch system that activates 2-D avatar's lip motion in synch with an incoming speech utterance. To realize the "real time" operation of the system, we contain the processing time by invoking merge and split procedures performing coarse-to-fine phoneme classification. At each stage of phoneme classification, we apply the support vector machine (SVM) to reduce the computational load while retraining the desired accuracy. The coarse-to-fine phoneme classification is accomplished via two stages of feature extraction: first, each speech frame is acoustically analyzed for 3 classes of lip opening using Mel Frequency Cepstral Coefficients (MFCC) as a feature; secondly, each frame is further refined in classification for detailed lip shape using formant information. We implemented the system with 2-D lip animation that shows the effectiveness of the proposed two-stage procedure in accomplishing a real-time lip-synch task. It was observed that the method of using phoneme merging and SVM achieved about twice faster speed in recognition than the method employing the Hidden Markov Model (HMM). A typical latency time per a single frame observed for our method was in the order of 18.22 milliseconds while an HMM method applied under identical conditions resulted about 30.67 milliseconds.

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ABSTRACT

1. Introduction

2. Modeling and extracting feature set for phoneme classification

3. Experiments

4. Conclusions

Acknowledgements

References

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UCI(KEPA) : I410-ECN-0101-2009-701-014434989