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A Study on TSIUVC Approximate-Synthesis Method using Least Mean Square

최소 자승법을 이용한 TSIUVC 근사합성법에 관한 연구

  • Lee, See-Woo (Dept.of Computer Information Communication Engineering, Sangmyung University)
  • 이시우 (상명대학교 컴퓨터정보통신공학부)
  • Published : 2002.04.01

Abstract

In a speech coding system using excitation source of voiced and unvoiced, it would be involves a distortion of speech waveform in case coexist with a voiced and an unvoiced consonants in a frame. This paper present a new method of TSIUVC (Transition Segment Including Unvoiced Consonant) approximate-synthesis by using Least Mean Square. The TSIUVC extraction is based on a zero crossing rate and IPP (Individual Pitch Pulses) extraction algorithm using residual signal of FIR-STREAK Digital Filter. As a result, This method obtain a high Quality approximation-synthesis waveform by using Least Mean Square. The important thing is that the frequency signals in a maximum error signal can be made with low distortion approximation-synthesis waveform. This method has the capability of being applied to a new speech coding of Voiced/Silence/TSIUVC, speech analysis and speech synthesis.

유성음원과 무성음원을 사용하는 음성부호화 방식에 있어서, 같은 프레임 안에 모음과 무성자음이 있는 경우에 음성 파형에 일그러짐이 나타난다. 본 논문에서는 최소 자승법을 적용한 새로운 TSIVUC 근사합성법을 제시하였다. 이 방법에서 TSlUVC의 추출에는 zero crossing rate과 FIR-STREAK 필터의 잔차신호를 이용한 개별피치 추출 알고리즘을 사용하였다. 실험결과, 최소 자승법을 적용하여 양호한 TSIUVC 근사합성 파형을 얻을 수 있었다. 또한 최대 오타신호에 있어서의 주파수 신호가 일그러짐이 적은 근사합성 파형에 중요한 역할을 한다는 것이다. 이 방법은 음성합성, 음성분석, 새로운 Voiced/Silence/TSIUVC의 음성부호화 방식에 활용할 수 있을 것으로 기대된다.

Keywords

References

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