Magnitude Modelling of HRTF Using Principal Component Analysis Applied to Complex Values

• Autorzy: Ramos O. A. , Tommasini F. C.

Identyfikatory

DOI

10.2478/aoa-2014-0051

• Języki publikacji: EN

Abstrakty

EN

Principal components analysis (PCA) is frequently used for modelling the magnitude of the head- related transfer functions (HRTFs). Assuming that the HRTFs are minimum phase systems, the phase is obtained from the Hilbert transform of the log-magnitude. In recent years, the PCA applied to HRTFs is also used to model individual HRTFs relating the PCA weights with anthropometric measurements of the head, torso and pinnae. The HRTF log-magnitude is the most used format of input data to the PCA, but it has been shown that if the input data is HRTF linear magnitude, the cumulative variance converges faster, and the mean square error (MSE) is smaller. This study demonstrates that PCA applied directly on HRTF complex values is even better than the two formats mentioned above, that is, the MSE is the smallest and the cumulative variance converges faster after the 8th principal component. Different objective experiments around all the median plane put in evidence the differences which, although small, seem to be perceptually detectable. To elucidate this point, psychoacoustic discrimination tests are done between measured and reconstructed HRTFs from the three types of input data mentioned, in the median plane between −45◦ and +90◦.

Słowa kluczowe

EN

head related transfer function; HRTF; principal components analysis; PCA; binaural audition; auditory perception

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2014
• Tom: Vol. 39, No. 4
• Strony: 477--482
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Ramos O. A.

• Centro de Investigación y Transferencia en Ac´ustica (CINTRA), Universidad Tecnológica Nacional, Facultad Regional Córdoba, UA del CONICET Mtro. López esq. Cruz Roja Argentina, Córdoba, Argentina
• Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas (CONICET) Rivadavia 1917. C.A.B.A, Argentina

autor

Tommasini F. C.

• Centro de Investigación y Transferencia en Ac´ustica (CINTRA), Universidad Tecnológica Nacional, Facultad Regional Córdoba, UA del CONICET Mtro. López esq. Cruz Roja Argentina, Córdoba, Argentina
• Facultad de Matem´atica, Astronom´ıa y F´ısica, Universidad Nacional de Córdoba Av. Medina Allende s/n, Ciudad Universitaria, Córdoba, Argentina
• Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas (CONICET) Rivadavia 1917. C.A.B.A, Argentina

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