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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 90
Přibil, Jiří , Přibilová, Anna , Matoušek, Jindřich
GMM classification of text-to-speech synthesis: identification of original speaker’s voice

This paper describes two experiments. The first one deals with evaluation of synthetic speech quality by reverse identification of original speakers whose voices had been used for several Czech text-to-speech (TTS) systems. The second experiment was aimed at evaluation of the influence ...

Campr, Pavel , Hrúz, Marek , Trojanová, Jana
Collection and preprocessing of czech sign language corpus for sign language recognition

This paper discusses the design, recording and preprocessing of a Czech sign language corpus. The corpus is intended for training and testing of sign language recognition (SLR) systems. The UWB-07-SLR-P corpus contains video data of 4 signers recorded from 3 different perspective...

Tihelka, Daniel , Hanzlíček, Zdeněk , Machač, Pavel , Skarnitzl, Radek , Matoušek, Jindřich
On the impact of labialization contexts on unit selection speech synthesis

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&...

Grůber, Martin , Tihelka, Daniel , Matoušek, Jindřich
Evaluation of various unit types in the unit selection approach for the Czech language using the Festival system

The present paper focuses on the utilization of concatenative speech synthesis, aiming to determine and compare the influence on the synthesized speech quality when various unit types are used in the unit selection approach. There are several unit types which can be used for t...

Grůber, Martin , Matoušek, Jindřich
Listening-test-based annotation of communicative functions for expressive speech synthesis

This paper is focused on the evaluation of listening test thatwas realized with a view to objectively annotate expressive speech recordingsand further develop a limited domain expressive speech synthesissystem. There are two main issues to face in this task. The first matterin issue...

Grůber, Martin , Matoušek, Jindřich
Improvements in czech expressive speech synthesis in limited domain

In our recent work, a method on how to enumerate differences between various expressive categories (communicative functions) has been proposed. To improve the overall impact of this approach to both the quality of synthetic expressive speech and expressivity perception by listeners, a f...

Hanzlíček, Zdeněk , Matoušek, Jindřich
F0 transformation within the voice conversion framework

In this paper, several experiments on f0 transformation within the voice conversion framework are presented. The conversion system is based on a probabilistic transformation of line spectral frequencies and residual prediction. Three probabilistic methods of instantaneous f0 transformation are describ...

Hanzlíček, Zdeně›k , Matoušek, Jindřich
Voice conversion based on probabilistic parameter transformation and extended inter-speaker residual prediction

Voice conversion is a process which modifies speech produced by one speaker so that it sounds as if it is uttered by another speaker. In this paper a new voice conversion system is presented. Speech is described with LSFs and the corresponding residua. LSFs are converted&...

Hrúz, Marek , Campr, Pavel , Dikici, Erinç , Kındıroğlu, Ahmet Alp , Krňoul, Zdeněk , Ronzhin, Alexander , Haşim, Sak , Schorno, Daniel , Yalçın, Hülya , Akarun, Lale , Aran, Oya , Karpov, Alexey , Saraçlar, Murat , Železný, Miloš
Automatic fingersign-to-speech translation system

The aim of this paper is to help the communication of two people, one hearing impaired and one visually impaired by converting speech to fingerspelling and fingerspelling to speech. Fingerspelling is a subset of sign language, and uses finger signs to spell letters of the ...

Hrúz, Marek , Campr, Pavel , Krňoul, Zdeněk , Železný, Miloš , Aran, Oya , Santemiz, Pinar
Multi-modal dialogue system with sign language capabilities

This paper presents the design of a multimodal sign-language-enabled dialogue system. Its functionality was tested on a prototype of an information kiosk for the deaf people providing information about train connections. We use an automatic computer-vision-based sign language recognition, automatic&#x...

Hrúz, Marek , Krňoul, Zdeněk , Campr, Pavel , Müller, Luděk
Towards automatic annotation of sign language dictionary corpora

This paper deals with novel automatic categorization of signs used in sign language dictionaries. The categorization provides additional information about lexical signs interpreted in the form of video files. We design a new method for automatic parameterization of these video files and ...

Romportl, Jan , Matoušek, Jindřich
Several aspects of machine-driven phrasing in text-to-speech systems

The article discusses differences between a priori and a posteriori phrasing and their importance in the task of automatic prosodic phrasing in text-to-speech systems. On several examples it illustrates shortcomings of common evaluation of a priori phrasing performance using a posteriori phr...

Vaněk, Jan , Trmal, Jan , Psutka, Josef V. , Psutka, Josef
Optimized acoustic likelihoods computation for NVIDIA and ATI/AMD graphics processors

In this paper, we describe an optimized version of a Gaussian-mixture-based acoustic model likelihood evaluation algorithm for graphical processing units (GPUs). The evaluation of these likelihoods is one of the most computationally intensive parts of automatic speech recognizers, but it can ...

Vaněk, Jan , Machlica, Lukáš , Psutka, Josef V. , Psutka, Josef
Covariance matrix enhancement approach to train robust Gaussian mixture models of speech data

An estimation of parameters of a multivariate Gaussian Mixture Model is usually based on a criterion (e.g. Maximum Likelihood) that is focused mostly on training data. Therefore, testing data, which were not seen during the training procedure, may cause problems. Moreover, ...

Vaněk, Jan , Machlica, Lukáš , Psutka, Josef
Estimation of Single-Gaussian and Gaussian mixture models for pattern recognition

Single-Gaussian and Gaussian-Mixture Models are utilized in various pattern recognition tasks. The model parameters are estimated usually via Maximum Likelihood Estimation (MLE) with respect to available training data. However, if only small amount of training data is available, the ...

Psutka, Josef , Švec, Jan , Psutka, Josef V. , Vaněk, Jan , Pražák, Aleš , Šmídl, Aleš , Ircing, Pavel
System for fast lexical and phonetic spoken term detection in a czech cultural heritage archive

The main objective of the work presented in this paper was to develop a complete system that would accomplish the original visions of the MALACH project. Those goals were to employ automatic speech recognition and information retrieval techniques to provide improved access to the&#...

Psutka, Josef V. , Vaněk, Jan , Psutka, Josef
Speaker-clustered acoustic models evaluated on GPU for on-line subtitling of parliament meetings

This paper describes the effort with building speaker-clustered acoustic models as a part of the real-time LVCSR system that is used more than one year by the Czech TV for automatic subtitling of parliament meetings broadcasted on the channel ČT24. Speaker-clustered acoustic models ...

Kanis, Jakub , Peňáz, Petr , Campr, Pavel , Hrúz, Marek
A methodology for automatic sign language dictionary creation

In this article we present the the sign language dictionary being developed by a research team of University of West Bohemia, Masaryk University and Palacký University. The aim is to create both an explanatory and a translation dictionary with respect to the linguistic...

Kanis, Jakub , Hrúz, Marek , Campr, Pavel
Metodika pro automatizovanou tvorbu slovníku znakového jazyka

Krňoul, Zdeněk , Hrúz, Marek , Campr, Pavel
Correlation analysis of facial features and sign gestures

In this paper we focus on the potential correlation of the manual and the non-manual component of sign language. This information is useful for sign language analysis, recognition and synthesis. We are mainly concerned with the application for sign synthesis. First we extracted fea...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 90