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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 97
Szkandera, Jakub , Kaas, Ondřej , Kolingerová, Ivana
A Clustering Approach to Path Planning for Big Groups

The paper introduces a new method of planning paths for crowds in dynamic environment represented by a graph of vertices and edges, where the edge weight as well as the graph topology may change, but the method is also applicable to environment with a different representa...

Svoboda, Lukáš , Brychcín, Tomáš
Improving Word meaning representations using Wikipedia categories

In this paper we extend Skip-Gram and Continuous Bag-of-Words Distributional word representations models via global context information. We use a corpus extracted from Wikipedia, where articles are organized in a hierarchy of categories. These categories provide useful topical information about e...

Šubelj, Lovro , Fiala, Dalibor , Ciglarič, Tadej , Kronegger, Luka
Convexity in scientific collaboration networks

Convexity in a network (graph) has been recently defined as a property of each of its subgraphs to include all shortest paths between the nodes of that subgraph. It can be measured on the scale [0, 1] with 1 being assigned to fully convex networks. The largest c...

Eliades, Charalambos , Lenc, Ladislav , Král, Pavel , Papadopoulos, Harris
Automatic face recognition with well-calibrated confidence measures

Many Automatic face recognition (AFR) methods achieve a high recognition accuracy when the environment is well-controlled. In the case of moderately controlled or fully uncontrolled environments however, the performance of most techniques is dramatically reduced. As a result, the provision of...

De Falco, Ivanoe , Della Cioppa, Antonio , Giugliano, Angelo , Marcelli, Angelo , Koutný, Tomáš , Krčma, Michal , Scafuri, Umberto , Tarantino, Ernesto
A genetic programming-based regression for extrapolating a blood glucose-dynamics model from interstitial glucose measurements and their derivatives

This paper illustrates the development and the applicability of an Evolutionary Computation approach to enhance the treatment of Type-1 diabetic patients that necessitate insulin injections. In fact, being such a disease associated to a malfunctioning pancreas that generates an insufficient amoun...

Lobaz, Petr
Coherent subhologram-based computer generated display hologram

A modification of the subhologram-based approach to the calculation of a computer generated display hologram of a 3-D scene is presented. The hologram area is split into subholograms. For each of them, a perspective image with depth coordinate is rendered and converted to a po...

Prantl, David , Prantl, Martin
Website traffic measurement and rankings: competitive intelligence tools examination

The purpose of this paper is to examine and verify the competitive intelligence tools Alexa and SimilarWeb, which are broadly used for website traffic data estimation. Tested tools belong to the state of the art in this area. The authors use quantitative approach. Research was...

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 ...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 97