Persons
prof. Ing. Jan Uhlíř, CSc.
All publications
Comparison of k-Means and Bayes classifiers for Human Body Motions Classification
- Authors: Ing. Jan Havlík, Ph.D., prof. Ing. Jan Uhlíř, CSc., Ing. Zdeněk Horčík,
- Publication: World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany. Berlin: Springer Science+Business Media, 2009. p. 421-424. IFMBE Proceedings. ISSN 1680-0737. ISBN 978-3-642-03881-5.
- Year: 2009
- DOI: 10.1007/978-3-642-03889-1-113
- Link: https://doi.org/10.1007/978-3-642-03889-1-113
- Department: Department of Circuit Theory
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Annotation:
This paper deals with a comparison of k-Means and Bayes classifiers designed for classification of the human body motions classification. The main task of this paper is to compare the performance and the reliability of classifiers. The presented work is a part of research of relations between brain and muscle activity. The sensing of body motions is based on standard DV camcorders system. The procedures have no negative impact to brain activity (the tracking does not affect the measured EEG signals). Presented paper includes the description of observing, discerning and parameterization procedures and the discussion of motion classification. The results of classification accuracy are the part of this paper.
Human Body Motions Classifications
- Authors: Ing. Jan Havlík, Ph.D., prof. Ing. Jan Uhlíř, CSc., Ing. Zdeněk Horčík,
- Publication: IFMBE Proceedings. Berlin: Springer, 2009. ISSN 1680-0737. ISBN 978-3-540-89207-6.
- Year: 2009
- DOI: 10.1007/978-3-540-89208-3_21
- Link: https://doi.org/10.1007/978-3-540-89208-3_21
- Department: Department of Circuit Theory
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Annotation:
This paper deals with video based parameterization and classification of human body motions. The main task of this work is to develop and verify the procedures for observing of muscle and brain activity. The developed procedures have no negative impact to brain activity (the tracking does not affect the measured EEG signals). The procedures required only standard hardware equipment accessible on neurological laboratories. The body motions are non-contact sensed using a pair of standard DV camcorders. This work includes the description of observing, discerning and parameterization procedures and the discussion of motion classification. The set of classifiers - hierarchical clustering algorithm, recursive clustering algorithm, k-means classifier, Bayes classifier and classifier based on discrimination functions - was developed and implemented. The analysis of the classifiers properties was accomplished in this work. The accuracy of classification was tested for selected
Tasks and Algorithms in Voice Technologies
- Authors: prof. Ing. Jan Uhlíř, CSc.,
- Publication: Akustické listy. 2009, 15(1), 5-12. ISSN 1212-4702.
- Year: 2009
- Department: Department of Circuit Theory
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Annotation:
The article briefly describes digital technologies that are used in the process of speech communication. Digital voice processing is applied in telecommunications, as well as in man-machine communication.
Speech Defect Analysis Using Hidden Markov Models
- Authors: Chaloupka, Z., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioengineering. 2007, 16(1), 67-72. ISSN 1210-2512.
- Year: 2007
- Department: Department of Circuit Theory
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Annotation:
The main aim of this paper is the analysis of speech deteriorated by a very rare disease, which induce epileptic seizures in a part of brain responsible for speech production. Speech defects, represented mostly by the combination of missing and mismatched phonemes, are sought and examined in the spectral and time domain. An algorithm, proposed in this paper, is based on Hidden Markov Models (HMMs) and it is most suitable for the speech recognition tasks. The algorithm is able to analyze in both time and spectral domains simultaneously; in the spectral domain as a log-likelihood score and in the time domain as a forced time alignment of the HMMs. The suggested algorithm works properly in the time domain. The results for the spectral domain are not credible, because the algorithm have to be tested on more data (not available at the time of paper preparation).
Technology of Speech Communication
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc., doc. Ing. Petr Pollák, CSc., Hanžl, V., prof. Ing. Roman Čmejla, CSc.,
- Publication: Praha: Nakladatelství ČVUT, 2007. ISBN 978-80-01-03888-8.
- Year: 2007
- Department: Department of Circuit Theory
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Annotation:
The book brings complex information about digital processing of human speech in the fields of transmission, synthesis, and coding. It should serve as studying material for the subject Digital processing of speech signals from master program of structural study and also for the subject Phonetic signals and their coding from doctoral study program. The purpose of the book is also to present general overview of this research field for wide public or to present several research results obtained in this field in the research team at the Department of Circuit Theory at Faculty of Electrical Engineering at CTU in Prague.
Speech Quality Evaluation Using HMM
- Authors: Chaloupka, Z., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Analýza a zpracování řečových a biologických signálů - Sborník prací 2006. Praha: České vysoké učení technické v Praze, 2006. pp. 37-42. ISBN 80-01-03621-9.
- Year: 2006
- Department: Department of Circuit Theory
Thumb Motion Classification using Discrimination Functions
- Authors: Ing. Jan Havlík, Ph.D., prof. Ing. Jan Uhlíř, CSc., Ing. Zdeněk Horčík,
- Publication: Applied Electronics 2006. Plzeň: ZČU Plzeň, 2006. pp. 55-57. ISBN 978-80-7043-442-0.
- Year: 2006
- DOI: 10.1109/AE.2006.4382963
- Link: https://doi.org/10.1109/AE.2006.4382963
- Department: Department of Circuit Theory
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Annotation:
This paper deals with the classification of three dimensional thumb motions. The thumb motion is parameterized tracing a special mark on the thumb, the coordinates of thumb rajectory are computed during the parameterization. The discrimination functions used for the classification of thumb motion are derived in this paper. The discrimination functions are based on statistical data analysis. The functions are derived from the Bayes theorem. The normal distribution of motion parameters is assumed. The parameters of discrimination functions are estimated using the Maximum Likelihood Estimation. The presented lassification is used in biomedical engineering for research on correlations between a human brain function and a muscle activity.
Electronic Circuits and Blocks
- Authors: Neumann, P., prof. Ing. Jan Uhlíř, CSc.,
- Publication: 2 ed. Praha: Czech Technical University in Prague, 2005. ISBN 80-01-03281-7.
- Year: 2005
- Department: Department of Circuit Theory
Mispronounciation Analysis Algorithm - Testing Methods and Results
- Authors: Chaloupka, Z., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Analýza a zpracování řečových a biologických signálů. Praha: ČVUT FEL, Katedra teorie obvodů, 2005. pp. 14-20. ISBN 80-01-03412-7.
- Year: 2005
- Department: Department of Circuit Theory
Analysis and Optimization of Telephone Speech Command Recognition System Performance in Noisy Environment
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioengineering. 2004, 13(1), 1-7. ISSN 1210-2512.
- Year: 2004
- Department: Department of Circuit Theory
Bayesian and Monte Carlo Change-Point Detection
- Authors: prof. Ing. Roman Čmejla, CSc., prof. Ing. Pavel Sovka, CSc., Štrupl, M., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the WSEAS International Conferences. New York: WSEAS Press, 2004. ISBN 960-8052-97-1.
- Year: 2004
- Department: Department of Circuit Theory
Bayesian and Monte Carlo Change-Point Detection
- Authors: prof. Ing. Roman Čmejla, CSc., prof. Ing. Pavel Sovka, CSc., Štrupl, M., prof. Ing. Jan Uhlíř, CSc.,
- Publication: WSEAS Transactions on Computers. 2004, 3(5), 1629-1634. ISSN 1109-2750.
- Year: 2004
- Department: Department of Circuit Theory
Comparison of PMC and MMSE Methods for Robust Speech Recognition
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Applied Electronics 2004. Plzeň: Západočeská univerzita v Plzni, 2004. pp. 170-173. ISBN 80-7043-274-8.
- Year: 2004
- Department: Department of Circuit Theory
Comparison of Selected PMC Based Robust Speech Recognition Approaches
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the Polish-Czech-Hungarian Workshop on Circuit Theory, Signal Processing and Telecommunications. Budapest: Budapest University of Technology and Economics, 2004. pp. 191-197. ISBN 96-34215-70-X.
- Year: 2004
- Department: Department of Circuit Theory
Increasing Robustness of Telephone Speech Recognition System Using Silence Model Adaptation Technique
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Conference Proceedings of Radioelektronika 2004. Bratislava: Slovak University of Technology, 2004. pp. 136-139. ISBN 80-227-2017-8.
- Year: 2004
- Department: Department of Circuit Theory
Study and Application of Silence Model Adaptation for Use in Telephone Speech Recognition System
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioengineering. 2004, 13(3), 1-6. ISSN 1210-2512.
- Year: 2004
- Department: Department of Circuit Theory
Using Standard Algorithm and Cepstral Transformations for Analysis of Mispronounciation and Incorrect Phoneme Sequencing
- Authors: Chaloupka, Z., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Digital Technologies 2004. Žilina: Žilinská univerzita, 2004. pp. 44-48. ISBN 80-8070-334-5.
- Year: 2004
- Department: Department of Circuit Theory
Parallel Model Combination Evaluation od SpeechDat(E) Telephone Database
- Authors: Novotný, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the Polish-Hungarian-Czech Workshop on Circuit Theory, Signal Processing, and Applications. Praha: ČVUT FEL, Katedra teorie obvodů, 2003. pp. 53-58. ISBN 80-01-02825-9.
- Year: 2003
- Department: Department of Circuit Theory
Digital Signal Processing
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc.,
- Publication: 2 ed. Praha: CTU. Publishing House, 2002. ISBN 80-01-02613-2.
- Year: 2002
- Department: Department of Circuit Theory
Electronic Circuits and Functional Blocks
- Authors: prof. Ing. Jan Uhlíř, CSc., Neumann, P.
- Publication: Praha: Czech Technical University in Prague, 2001. ISBN 80-01-02394-X.
- Year: 2001
- Department: Department of Circuit Theory
Electronic Circuits and System Design - New Aspects of Study
- Authors: prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the International Conference on Advanced Engineering Design. Glasgow: University of Glasgow, 2001. pp. 351-356. ISBN 0-85261-731-3.
- Year: 2001
- Department: Department of Circuit Theory
Speech Technology Education at the Czech Technical University in Prague
- Authors: prof. Ing. Roman Čmejla, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the European Workshop on Education and Research in Speech Communication Sciences. Utrecht: Utrecht Institute of Linguistics, 2000. pp. 10-13.
- Year: 2000
- Department: Department of Circuit Theory
ASR with Noisy Speech Pre-processing and Phoneme Model Re-estimation
- Authors: Vopička, J., doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of Robust Methods for Speech Recognition in Adverse Conditions. Brussels: COST Office, 1999. pp. 151-154.
- Year: 1999
- Department: Department of Circuit Theory
Electronic Circuits and Function Blocks
- Authors: Neumann, P., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Praha: Czech Technical University in Prague, 1999. ISBN 80-01-01981-0.
- Year: 1999
- Department: Department of Circuit Theory
Phoneme Model Based ASR of Words in Car Environment
- Authors: Vopička, J., doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Polish-Hungarian-Czech Workshop on Circuit Theory, Signal Processing, and Application. Praha: České vysoké učení technické v Praze, 1999. pp. 89-92. ISBN 80-01-02047-9.
- Year: 1999
- Department: Department of Circuit Theory
The Set of Exercises in Digital Speech Processing
- Authors: prof. Ing. Jan Uhlíř, CSc.,
- Publication: Method and Tool Innovations for Speech Science Education (MATISSE). London: Department of P & L, University College London, 1999. pp. 53-56. ISBN 0-9535586-0-6.
- Year: 1999
- Department: Department of Circuit Theory
Experimental Study of Speech Recognition in Noisy Environment
- Authors: Kreisinger, T., doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Signal Analysis and Prediction. Boston: Birkhaeuser, 1998. p. 455-466. ISBN 0-8176-4042-8.
- Year: 1998
- Department: Department of Circuit Theory
French-Czech Cross-Language Experiment
- Authors: Vopička, J., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the 8-th Czech-German Workshop on Speech Processing. Praha: AV ČR, Ústav radiotechniky a elektroniky, 1998. pp. 55-56. ISBN 80-86269-00-0.
- Year: 1998
- Department: Department of Circuit Theory
Speech Signal Characteristics in Speech Technology Applications
- Authors: prof. Ing. Jan Uhlíř, CSc.,
- Publication: Analysis of Biomedical Signals and Images. Brno: VUTIUM Press, 1998. pp. 188-193. ISBN 80-214-1169-4.
- Year: 1998
- Department: Department of Circuit Theory
Parallel Neural Network in Continuous Speech Recognition
- Authors: Kohoutová, L., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioelektronika '97. Bratislava: STU v Bratislave, 1997. pp. 33-35. ISBN 80-227-0943-3.
- Year: 1997
- Department: Department of Circuit Theory
Phonetic Alphabet for Speech Recognition of Czech
- Authors: Nouza, J., Psutka, J., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioengineering. 1997, 6(5), 30-36. ISSN 1210-2512.
- Year: 1997
- Department: Department of Circuit Theory
Study of Speech Recognition in Noisy Environment
- Authors: Kreisinger, T., prof. Ing. Pavel Sovka, CSc., doc. Ing. Petr Pollák, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Signal Analysis and Prediction I. Praha: ICT Press, 1997. p. 334-337. ISBN 80-7080-282-0.
- Year: 1997
- Department: Department of Circuit Theory
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Annotation:
Achieving reliable performance in speech recognition is the car for mobile telephony application has been studying intensively for more than one decade. This paper addresses effects of mismatched conditions and their minimization with respect to the performance of speaker-independent isolated. word recognition in the car-noise environment without consideration of Lombard effect. This study is primarily intended to study the dependence of the recognition rate on the SNR of an input signal without and with noise enhancement preprocessing, especially to find conditions under that the modified spectral subtraction call be effectively used for the speech recognition ill a real non-stationary car-noise environment. If as the worst recognition rate. is admitted e.g. 80%, then tile use of spectral subtraction methods enables to use wider interval of input SNRs: for the trainig: made oil a clean speech this interval is (40,6)(1) dB; for the training made on a noisy speech this interval is (40,-2) dB; for tile training performed oil an enhanced speech this interval is (40,-8) dB. The third case gives tile widest interval of SNRs in which a recogniser (with tile final recognition rate ill tile interval of (100,80)%) can be used.
Artifical Neuron Net "Helps" in Continuous Speech Recognition
- Authors: Kohoutová, L., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Radioelektronika '96. Brno: VUT v Brně, 1996, pp. 432-434. ISBN 80-214-0617-8.
- Year: 1996
- Department: Department of Circuit Theory
Noise Cancellation Systems
- Authors: prof. Ing. Pavel Sovka, CSc., doc. Ing. Petr Pollák, CSc., Davídek, V., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Workshop 96. Praha: České vysoké učení technické v Praze, 1996, pp. 725-726.
- Year: 1996
- Department: Department of Circuit Theory
Digital Signal Processing
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc.,
- Publication: Praha: Czech Technical University in Prague, 1995. ISBN 80-01-01303-0.
- Year: 1995
- Department: Department of Circuit Theory
Speech Recognition Systems
- Authors: prof. Ing. Jan Uhlíř, CSc.,
- Publication: Workshop 95. Praha: České vysoké učení technické v Praze, 1995. pp. 571-572.
- Year: 1995
- Department: Department of Circuit Theory
Speech/Pause Detection for Real-Time Implementation of Spectral Subtraction Algorithm
- Authors: prof. Ing. Pavel Sovka, CSc., Davídek, V., doc. Ing. Petr Pollák, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: ICSPAT 95. The 6th International Conference on Signal Processing Applications and Technology. Boston: DSP, 1995. pp. 1955-1958.
- Year: 1995
- Department: Department of Circuit Theory
The Concept of the Open Recognition System
- Authors: prof. Ing. Jan Uhlíř, CSc., Hanžl, V.
- Publication: COST-249 Meeting. 1995. pp. 1-5.
- Year: 1995
- Department: Department of Circuit Theory
University Courses in DSP
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc.,
- Publication: DDECS '95, Design and Diagnostics of Electronic Circuits and Systems '95. Ostrava: VŠB-TUO, 1995. pp. 114-118.
- Year: 1995
- Department: Department of Circuit Theory
Speech Recognition Systems
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc., doc. Ing. Petr Pollák, CSc., Hanžl, V.
- Publication: CTU Seminar 94. Praha: České vysoké učení technické v Praze, 1994. pp. 197-198.
- Year: 1994
- Department: Department of Circuit Theory
Vector Quantiser Using Kohonen Neural Net
- Authors: Tučková, J., prof. Ing. Jan Uhlíř, CSc.,
- Publication: 31st Conference on Acoustics. Praha: České vysoké učení technické v Praze, 1994. pp. 179-182. ISBN 80-01-01146-1.
- Year: 1994
- Department: Department of Circuit Theory
Noise Cancellation Methods
- Authors: prof. Ing. Jan Uhlíř, CSc., prof. Ing. Pavel Sovka, CSc.,
- Publication: Workshop 93. Praha: České vysoké učení technické v Praze, 1993. pp. 191-192.
- Year: 1993
- Department: Department of Circuit Theory
Noise Suppression System for a Car
- Authors: doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Proceedings of the 3rd European Conference on Speech, Communication and Technology. Berlin: ESCA, 1993. pp. 1073-1076. ISSN 1018-4074.
- Year: 1993
- Department: Department of Circuit Theory
Noise Suppression System for Speech Degraded in Running Car
- Authors: doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: Sprachverarbeitung: 3. Tschechisch-Deutscher Workshop. Praha: AV ČR, Ústav radiotechniky a elektroniky, 1993. pp. 25.
- Year: 1993
- Department: Department of Circuit Theory
Non-musical Tone Spectral Subtraction
- Authors: prof. Ing. Jan Uhlíř, CSc., doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc.,
- Publication: Proceedings of the Czech-Polish-Hungarian Workshop on Circuits Theory and Application. Praha: České vysoké učení technické v Praze, 1993. pp. 99-103.
- Year: 1993
- Department: Department of Circuit Theory
One Channel Suppression System for a Car
- Authors: doc. Ing. Petr Pollák, CSc., prof. Ing. Pavel Sovka, CSc., prof. Ing. Jan Uhlíř, CSc.,
- Publication: VIII Symposium Nacional de Union Ceintifica Internacional de Radio. Valencia: URSI, 1993. pp. 409-413.
- Year: 1993
- Department: Department of Circuit Theory