计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
24期
214-218
,共5页
同态解卷%基音检测%语音%频率不变线性滤波器
同態解捲%基音檢測%語音%頻率不變線性濾波器
동태해권%기음검측%어음%빈솔불변선성려파기
homomorphism deconvolution%pitch detection%speech%frequency invariant linear filter
语音处理中基音检测是极为重要的环节之一，然而浊音中的基音往往会受到声道特性和噪声的影响而导致检测结果的误差。利用同态解卷处理，将浊音中的激励信号和声道特性进行分离，然后再在激励信号中利用自相关检测基音，可以减小声道特性和噪声对基音检测的影响，从而提高基音检测的精度。通过理论模型验证了该方法的可行性，而且实际语音信号处理结果表明，该方法在基音检测时可以基本不受声道特性和噪声的影响。
語音處理中基音檢測是極為重要的環節之一，然而濁音中的基音往往會受到聲道特性和譟聲的影響而導緻檢測結果的誤差。利用同態解捲處理，將濁音中的激勵信號和聲道特性進行分離，然後再在激勵信號中利用自相關檢測基音，可以減小聲道特性和譟聲對基音檢測的影響，從而提高基音檢測的精度。通過理論模型驗證瞭該方法的可行性，而且實際語音信號處理結果錶明，該方法在基音檢測時可以基本不受聲道特性和譟聲的影響。
어음처리중기음검측시겁위중요적배절지일，연이탁음중적기음왕왕회수도성도특성화조성적영향이도치검측결과적오차。이용동태해권처리，장탁음중적격려신호화성도특성진행분리，연후재재격려신호중이용자상관검측기음，가이감소성도특성화조성대기음검측적영향，종이제고기음검측적정도。통과이론모형험증료해방법적가행성，이차실제어음신호처리결과표명，해방법재기음검측시가이기본불수성도특성화조성적영향。
Pitch detection is one of the extremely important steps in speech signal processing, but the detection result usually has errors because pitch is influenced by vocal tract characteristics and noise. The excitation signal and vocal tract characteristics in voiced speech are separated by using homomorphism deconvolution, so as to reduce the influence of vocal tract characteristics and improve the pitch detection accuracy. Then autocorrelation is used to detect pitch in excitation signal. The feasibility is veri-fied by theoretical model. The experiment results of real speech signal indicate that the vocal tract characteristics and noise have rarely influence on pitch detection using this method.
