Pavel Machac

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Within the speech sciences, consistency in speech segmentation is an issue, for example in corpora development and for reproducibility across studies. The objective of Principles of Phonetic Segmentation is to provide wellgrounded and consistent segmentation conventions. The book is targeted as a user-friendly reference for psycholinguists, phoneticians and(More)
This paper presents initial experiments with the identification and automatic detection of parasitic sounds in speech signals. The main goal of this study is to identify such sounds in the source recordings for unit-selection-based speech synthesis systems and thus to avoid their unintended usage in synthesised speech. The first part of the paper describes(More)
Czech represents a language with a high correlation between phonological and phonetic voicing, but the perception of the voicing contrast is supported by other phonetic correlates. We employed electropalatography (EPG) to investigate the articulatory correlates of the voicing contrast in phonated and whispered speech. Eight subjects read short sentences and(More)
This paper presents a study on coarticulatory labialization and the significance of its respecting/violation during selection and concatenation of speech units in the unit selection speech synthesis. The aim of this study is to improve the overall speech quality, especially to increase the perceptual inconspicuousness between concatenated units. The(More)
This paper represents another step towards the linguistic naturalness of synthetic Czech. Its main goal is to eliminate undesirable occurrences of the so-called parasitic speechsounds, specifically preglottalization, from synthesized speech. After explaining the nature of parasitic speechsounds in Czech, we present procedures for both automatic detection(More)
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