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Glottal Source Parameterization: A Comparative Study Authors: Ixone Arroabarren, Alfonso Carlosena UNIVERSIDAD PÚBLICA DE NAVARRA Dpt. Electrical Engineering.

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Presentation on theme: "Glottal Source Parameterization: A Comparative Study Authors: Ixone Arroabarren, Alfonso Carlosena UNIVERSIDAD PÚBLICA DE NAVARRA Dpt. Electrical Engineering."— Presentation transcript:

1 Glottal Source Parameterization: A Comparative Study Authors: Ixone Arroabarren, Alfonso Carlosena UNIVERSIDAD PÚBLICA DE NAVARRA Dpt. Electrical Engineering and Electronic Campus de Arrosadía E-31006 Pamplona, Navarra, SPAIN carlosen@unavarra.es VOICE QUALITY: FUNCTIONS, ANALYSIS AND SYNTHESIS GENEVA - AUGUST 27-29, 2003 ISCA Tutorial and Research Workshop International Speech Communication Association

2 Glottal Source Parameterization: A Comparative Study SUMMARY 0. Introduction 1. New Glottal Source Parameters 2. NAQ and PSP in the LF model 3. Practical considerations 4. Natural Speech Analysis 5. Conclusions Universidad Pública de Navarra

3 0. INTRODUCTION The study of Voice Quality Speech, Singing Inverse Filtering Glottal Source Parameterization Glottal Source Vocal Tract Response Glottal Source Parameters Open Quotient Asymmetry Coefficient Spectral Tilt  Direct Estimation methods  Fit Estimation methods  New Glottal Source Parameters: NAQ and PSP - Time Domain: Measurement of Landmarks - A model fitting procedure - Time domain references are avoided - Amplitude and Fundamental frequency Normalized Parameters - Frequency Domain: Spectral Correlates (H1-H2) ~ Oq Universidad Pública de Navarra Glottal Source Parameterization: A Comparative Study

4 Universidad Pública de Navarra 1. NEW GLOTTAL SOURCE PARAMETERS (I) Normalized Amplitude Quotient (NAQ) Simplified Glottal Source Waveform Strongly correlated with the Closing Quotient Normalized in amplitude and frequency Closing Quotient Natural Speech Inverse Filtered Glottal Source Normalized Amplitude Quotient T Glottal Source Parameterization: A Comparative Study

5 Universidad Pública de Navarra 1. NEW GLOTTAL SOURCE PARAMETERS (II) Parabolic Spectral Parameter (PSP) Inverse Filtered Glottal Source Pitch Synchronous Glottal Source Spectrum Parabolic Curve: a depends on Fundamental Frequency F o = 100 HzF o = 200 Hz Normalized in amplitude and frequency Glottal Source Parameterization: A Comparative Study

6 The study of Voice Quality Speech, Singing Inverse Filtering Glottal Source Parameterization Glottal Source Vocal Tract Response Glottal Source Parameters Open Quotient Asymmetry Coefficient Spectral Tilt  Direct Estimation methods  Fit Estimation methods  New Glottal Source Parameters: NAQ and PSP - Time Domain: Measurement of Landmarks - A model fitting procedure - Time domain references are avoided - Amplitude and Fundamental frequency Normalized Parameters - Frequency Domain: Spectral Correlates (H1-H2) ~ Oq Universidad Pública de Navarra Glottal Source Parameterization: A Comparative Study

7 Universidad Pública de Navarra 2. NAQ AND PSP IN THE LF MODEL (I) LF model Glottal Source Derivative  Direct Synthesis Parameters  Timing Parameters  Glottal Source Parameters Open Quotient Asymmetry Coefficient Spectral Tilt Glottal Source Parameterization: A Comparative Study

8 Universidad Pública de Navarra 2. NAQ AND PSP IN THE LF MODEL (II) NAQ and PSP versus (O q, , f t ) Both parameters are correlated Glottal Source Parameterization: A Comparative Study

9 Universidad Pública de Navarra 3. PRACTICAL CONSIDERATIONS Sampling Frequency NAQ Calculation: One fundamental period extraction PSP Calculation: Right Period Extraction Wrong Period Extraction Maximum Error High Error  Loss of resolution Low Error  Wrong values Glottal Source Parameterization: A Comparative Study

10 Universidad Pública de Navarra 4. NATURAL SPEECH ANALYSIS (I) Voice Material Speech database 1 (American English)  1 male  Sentence : "She has left for a great party today."  EGG  Author : Christophe d'ALESSANDRO, ©2003, LIMSI-CNRS, France Modal VoiceModal Vocal TractSmallLong TensionRelaxTense PitchLowHigh VOCAL QUALITIES Glottal Source Parameterization: A Comparative Study

11 Universidad Pública de Navarra 4. NATURAL SPEECH ANALYSIS (II) Analysis Procedure Speech, Singing NAQ CalculationPSP Calculation Period Extraction Inverse Filtering Glottal Source DerivativeVocal Tract Response Glottal Source Parameterization: A Comparative Study

12 Universidad Pública de Navarra 4. NATURAL SPEECH ANALYSIS (III) Results Vowel [a:] Vowel [ e ] Glottal Source Parameterization: A Comparative Study

13 Universidad Pública de Navarra 4. NATURAL SPEECH ANALYSIS (IV) Results Vowel [I] Glottal Source Parameterization: A Comparative Study

14 Universidad Pública de Navarra 5. CONCLUSIONS  The NAQ and the PSP are two global parameters  f(O q, , f t )  Although their definition is different they parameterize the Glottal Source in the same way  The NAQ calculation is more robust than the PSP calculation  Although PSP is a spectral measurement it depends on how the glottal period is extracted Glottal Source Parameterization: A Comparative Study

15 Authors: Ixone Arroabarren, Alfonso Carlosena UNIVERSIDAD PÚBLICA DE NAVARRA Dpt. Electrical Engineering and Electronic Campus de Arrosadía E-31006 Pamplona, Navarra, SPAIN carlosen@unavarra.es VOICE QUALITY: FUNCTIONS, ANALYSIS AND SYNTHESIS GENEVA - AUGUST 27-29, 2003 ISCA Tutorial and Research Workshop International Speech Communication Association

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