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A project of speech input and output in an e-commerce application
Freitas, D.; Moura, António; Braga, Daniela; Ferreira, Helder; Teixeira, João Paulo; Barros, Maria João; Gouveia, Paulo D.F.; Latsch, VagnerThe present paper describes the work done during the last year in the development of European Portuguese (EP) speech recognition and synthesis channels for an Internet e-commerce application. The objective of this work was to develop the appropriate speech input and output, to enable the user to more comfortably use an e-commerce web site issuing commands and options under guidance of a menu system. The speech ...
Phonetic events from the labeling the european Portuguese database for speech s...
Teixeira, João Paulo; Freitas, D.; Braga, Daniela; Barros, Maria João; Latsch, VagnerIn this paper a labeled new speech signal database (FEUP/IPB-DB) in Standard European Portuguese (hereafter SEP) is presented. The objective of this work is, on one hand, to provide phonetic material for Text-to-Speech (TTS) systems construction, either from the start or to improve the quality of existing ones, and, on the other hand, to place at service of the SEP scientific community a phonetically and prosod...
Correlation between phonetic factors and linguistic events regarding a prosodic...
Freitas, D.; Braga, Daniela; Barros, Maria João; Latsch, Vagner; Teixeira, João PauloIn this article a prosodic model for European Portuguese (henceforth EP) based on a linguistic approach is described. It was developed in the scope of the Antigona Project, an electronic-commerce system using a speech interface (Speech to Text plus Text To Speech, the latter based on a time concatenation technique) for EP language. The purpose of our work is to contribute with practical strategies in order to i...
Back close non-syllabic vowel [U] behaviour in European Portuguese: reduction o...
Barros, Maria João; Braga, Daniela; Freitas, D.; Teixeira, João Paulo; Latsch, VagnerIn this paper we analyse and describe the phonetic behavior of the non-tonic back closed vowel [u] in European Portuguese (EP) in what respects its quality and relative duration. Slow and faster speech was used. The objective of this work is to contribute with experimental results in order to obtain a more accurate comprehension of this vowel’s profile, which can be integrated and extended to other non-tonic vo...
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