Browsing by Person "Kraljevski, I."

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Analysis and Synthesis of Glottalization Phenomena in German-Accented English
(Springer Verlag, 2014) Kraljevski, I.; Bissiri, Maria Paola; Strecha, G.; Hoffmann, R_diger; Potapova, R.; Ronzhin, A.; Vlado, D.
The present paper investigates the analysis and synthesis of glottalization phenomena in German-accented English. Word-initial glottalization was manually annotated in a subset of a German-accented English speech corpus. For each glottalized segment, time-normalized F0 and log-energy contours were produced and principal component analysis was performed on the contour sets in order to reduce their dimensionality. Centroid contours of the PC clusters were used for contour reconstruction in the resynthesis experiments. The prototype intonation and intensity contours were superimposed over non-glottalized word-initial vowels in order to resynthesize creaky voice. This procedure allows the automatic creation of speech stimuli which could be used in perceptual experiments for basic research on glottalizations.
Comparison of forced-alignment speech recognition and humans for generating reference VAD
(International Speech and Communication Association, 2015) Kraljevski, I.; Tan, Z-H; Bissiri, Maria Paola
This present paper aims to answer the question whether forced-alignment speech recognition can be used as an alternative to humans in generating reference Voice Activity Detection (VAD) transcriptions. An investigation of the level of agreement between automatic/manual VAD transcriptions and the reference ones produced by a human expert was carried out. Thereafter, statistical analysis was employed on the automatically produced and the collected manual transcriptions. Experimental results confirmed that forced-alignment speech recognition can provide accurate and consistent VAD labels.