Grazyna Demenko

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Segmental duration was investigated in a database of Polish read speech (from one male speaker). The material was labeled automatically and then manually verified. The dependence of phone duration on a set of features was verified with the CART algorithm. The duration phenomena were analyzed in relation to syllable, foot and phrase structure. The results(More)
The paper provides an overview of the Polish Speech Database for taking dictation of legal texts, created for the purpose of LVCSR system for Polish. It presents background information about the design of the database and the requirements coming from its future uses. The applied method of the text corpora construction is presented as well as the database(More)
The paper concerns prosody annotation especially for application in a corpus based speech synthesis. In order to establish the rules of automatic intonation modelling, phonetically labeled speech database of 4 hours has been perceptually and acoustically analyzed. The speech material included different text types and prosodically rich phrases. The(More)
This paper describes results of the investigation of Polish segmental duration for the purpose of speech synthesis. The experiment is a continuation of the previous work of the same authors [1] aiming at improving the outcome of the duration prediction mechanism to enhance the overall quality of synthesized speech. Duration prediction models for speech(More)
This paper presents the results of a set of experiments assessing the perceived quality of the Polish version of the BOSS unit selection synthesis system. The experiments aimed to evaluate the potential improvement of synthesis quality by three factors pertaining to corpus structure and coverage as well as levels of corpus annotation. The three factors(More)
This study investigates cross-language differences in pitch range and variation in four languages from two language groups: English and German (Germanic) and Bulgarian and Polish (Slavic). The analysis is based on large multi-speaker corpora (48 speakers for Polish, 60 for each of the other three languages). Linear mixed models were computed that include(More)
This paper gives a detailed information on the design of the speech corpus for the purpose of developing an ASR-based pronunciation tutoring system. In the first place, assumptions on the structure of the corpus are presented. Then collection of text material, recordings and procedure of annotation of the resulting speech corpus are described. In the end,(More)
The Bonn Open Synthesis System (BOSS) is open-source software for unit selection speech synthesis that has been used for the generation of high-quality German and Dutch speech. This article presents ongoing research and development aimed at adapting BOSS to the Polish language. In the first section, the origins and workings of the unit selection method for(More)