EPOCH EXTRACTION FROM LINEAR PREDICTION RESIDUAL FOR IDENTIFICATION OF CLOSED GLOTTIS INTERVAL

被引:166
作者
ANANTHAPADMANABHA, TV [1 ]
YEGNANARAYANA, B [1 ]
机构
[1] INDIAN INST SCI, DEPT ELECT COMMUN ENGN, BANGALORE 560012, INDIA
来源
IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING | 1979年 / 27卷 / 04期
关键词
D O I
10.1109/TASSP.1979.1163267
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In voiced speech analysis epochal information is useful in accurate estimation of pitch periods and the frequency response of the vocal tract system. Ideally, linear prediction (LP) residual should give impulses at epochs. However, there are often ambiguities in the direct use of LP residual since samples of either polarity- occur around epochs. Further, since the digital inverse filter does not compensate the phase response of the vocal tract system exactly, there is an uncertainty in the estimated epoch position. In this paper we present an interpretation of LP residual by considering the effect of the following factors: l)the shape of glottal pulses, 2) inaccurate estimation of formants and band-widths, 3) phase angles. of formants at the instants of excitation, and 4) zeros in the vocal tract system. A method for the unambiguous identification of epochs from LP residual is then presented. The accuracy of the method is tested by comparing the results with the epochs obtained from the estimated glottal pulse shapes for several vowel segments. The method is used to identify the closed glottis interval for the estimation of the true frequency response of the vocal tract system. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.
引用
收藏
页码:309 / 319
页数:11
相关论文
共 20 条
[1]  
ANANTHAPADMANAB.TV, 1977, THESIS INDIAN I SCI
[2]  
ANANTHAPADMANAB.TV, 1977, C REC IEEE INT C ACO, P336
[3]   EPOCH EXTRACTION OF VOICED SPEECH [J].
ANANTHAPADMANABHA, TV ;
YEGNANARAYANA, B .
IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING, 1975, 23 (06) :562-570
[4]   SPEECH ANALYSIS AND SYNTHESIS BY LINEAR PREDICTION OF SPEECH WAVE [J].
ATAL, BS ;
HANAUER, SL .
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1971, 50 (02) :637-+
[5]  
ATAL BS, 1974, SPEECH COMMUN SEMINA
[6]  
Fant G., 1970, ACOUSTIC THEORY SPEE, P15
[7]  
FLANAGAN JL, 1972, SPEECH ANAL SYNTHESI, P184
[8]   SPECTRAL-FLATNESS MEASURE FOR STUDYING AUTOCORRELATION METHOD OF LINEAR PREDICTION OF SPEECH ANALYSIS [J].
GRAY, AH ;
MARKEL, JD .
IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING, 1974, AS22 (03) :207-217
[9]  
HOLMES JN, 1975, C REC IEEE INT C ACO, P39
[10]   LINEAR PREDICTION - TUTORIAL REVIEW [J].
MAKHOUL, J .
PROCEEDINGS OF THE IEEE, 1975, 63 (04) :561-580