• 말소리와 음성과학
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• 제8권4호
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• pp.89-95
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• 2016

The purpose of this work is to analyze and synthesize the pseudo-periodicity of voice using a source model. A speech signal has periodic characteristics; however, it is not completely periodic. While periodicity contributes significantly to the production of prosody, emotional status, etc., pseudo-periodicity contributes to the distinctions between normal and abnormal status, the naturalness of normal speech, etc. Measurement of pseudo-periodicity is typically performed through parameters such as jitter and shimmer. For studying the pseudo-periodic nature of voice in a controlled environment, through collected natural voice, we can only observe the distributions of the parameters, which are limited by the size of collected data. If we can generate voice samples in a controlled manner, experiments that are more diverse can be conducted. In this study, the probability distributions of vowel pitch variation are obtained from the speech signal. Based on the probability distribution of vocal folds, pulses with a designated jitter value are synthesized. Then, the target and re-analyzed jitter values are compared to check the validity of the method. It was found that the jitter synthesis method is useful for normal voice synthesis.

• Journal of the Korean Data and Information Science Society
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• 제9권2호
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• pp.237-246
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• 1998

지금까지 알려진 의사난수 생성기에서는 혼합 합동 생성기, 승산 합동 생성기, 유니버셜 난수 생성기, 역함수 합동 생성기, 양의 역함수 난수 생성기 등 여러 가지가 있다. 이러한 의사난수 생성기에 대하여 각각 20, 40, 60, 80, 100개의 자료를 생성하여 유의수준(${\alpha}$) 0.1, 0.05, 0.01 기준으로 10,000번의 시행 과정을 통하여 난수의 특성인 일양성과 독립성을 만족하는지를 검정하였다.