망각소자를 갖는 t-분포 강인 연속 추정을 이용한 음성 신호 추정에 관한 연구

Robust Sequential Estimation based on t-distribution with forgetting factor for time-varying speech

In this paper, to estimate the time-varying parameters of speech signal, we use the robust sequential estimator based on t-distribution and, for time-varying signal, introduce the forgetting factor. By using the RSE based on t-distribution with small degree of freedom, we can alleviate efficiently the effects of outliers to obtain the better performance of parameter estimation. Moreover, by the forgetting factor, the proposed algorithm can estimate the accurate parameters under the rapid variation of speech signal.