Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129036
Tomás Koctúr, Matus Pleva, J. Juhár
This paper describes selected concepts and solutions that were used to build an interface for smart audiovisual data archive (ISADA). Automatic speech recognition (ASR) cloud system of Department of Electronic and Multimedia Telecom-munication (KEMT) of The Faculty of Electrical Engineering and Informatics of the Technical University of Košice (FEI TU) is used as a base of this archive. ASR cloud system do speech-to-text recognition of received audio stream and outputs time aligned words and sentences. Purpose of the ISADA system is to annotate inserted media (audio or video) and search in previously annotated media. ISADA is an automatic software that performs all necessary steps to annotate media including file upload and media presentation on the web. Whole concept of ISADA will be described in this paper.
{"title":"Interface for smart audiovisual data archive","authors":"Tomás Koctúr, Matus Pleva, J. Juhár","doi":"10.1109/RADIOELEK.2015.7129036","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129036","url":null,"abstract":"This paper describes selected concepts and solutions that were used to build an interface for smart audiovisual data archive (ISADA). Automatic speech recognition (ASR) cloud system of Department of Electronic and Multimedia Telecom-munication (KEMT) of The Faculty of Electrical Engineering and Informatics of the Technical University of Košice (FEI TU) is used as a base of this archive. ASR cloud system do speech-to-text recognition of received audio stream and outputs time aligned words and sentences. Purpose of the ISADA system is to annotate inserted media (audio or video) and search in previously annotated media. ISADA is an automatic software that performs all necessary steps to annotate media including file upload and media presentation on the web. Whole concept of ISADA will be described in this paper.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122919756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129062
V. Stofanik, M. Minárik, E. Cocherová
This paper examines modification of an oscillator with parallel LC resonant circuit, in order to confirm that the Barkhausen criterion is a necessary, but not sufficient condition for steady state oscillations existence in closed-loop feedback systems. Up to now, only oscillators with different RC circuits in their feedback loop have been analyzed. In this study, we examine an oscillator circuit with parallel LC resonant circuit where self-sustained steady state oscillations do not occur even when the Barkhausen condition is satisfied.
{"title":"On the existence of steady state oscillations in closed-loop feedback systems","authors":"V. Stofanik, M. Minárik, E. Cocherová","doi":"10.1109/RADIOELEK.2015.7129062","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129062","url":null,"abstract":"This paper examines modification of an oscillator with parallel LC resonant circuit, in order to confirm that the Barkhausen criterion is a necessary, but not sufficient condition for steady state oscillations existence in closed-loop feedback systems. Up to now, only oscillators with different RC circuits in their feedback loop have been analyzed. In this study, we examine an oscillator circuit with parallel LC resonant circuit where self-sustained steady state oscillations do not occur even when the Barkhausen condition is satisfied.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127277094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128995
L. Rejfek, J. Pesek, V. Brazda
This paper deals with target detection from the FMICW radar signals. Paper shows an experimental measurement results of a new cloud radar PCDR-35 at 35,4 GHz which is in development. Method consists of a few steps. The first step is averaging of a few realizations in spectral domain. Then a background (clutter and system influences) is subtracted from the spectrum. The next steps are thresholding and detection of the false targets. The last step is separation of the targets.
{"title":"Targets detection for FMICW radar","authors":"L. Rejfek, J. Pesek, V. Brazda","doi":"10.1109/RADIOELEK.2015.7128995","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128995","url":null,"abstract":"This paper deals with target detection from the FMICW radar signals. Paper shows an experimental measurement results of a new cloud radar PCDR-35 at 35,4 GHz which is in development. Method consists of a few steps. The first step is averaging of a few realizations in spectral domain. Then a background (clutter and system influences) is subtracted from the spectrum. The next steps are thresholding and detection of the false targets. The last step is separation of the targets.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131838990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129027
F. Záplata, M. Kasal
Carrier recovery system is a very important part of the digital radio frequency receivers. Tracking frequency estimators are able to compensate Doppler shifts of the signal coming from fast moving objects. There are many algorithms based on several approaches, but the noisy environment stays the big issue. The paper introduces novel approach to the frequency estimation suited for weak suppressed carrier BPSK signal even below the noise level. Both the open loop version suitable for acquisition and the closed loop version with narrow band input more convenient for tracking are described.
{"title":"Spectrum averaging carrier frequency estimation","authors":"F. Záplata, M. Kasal","doi":"10.1109/RADIOELEK.2015.7129027","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129027","url":null,"abstract":"Carrier recovery system is a very important part of the digital radio frequency receivers. Tracking frequency estimators are able to compensate Doppler shifts of the signal coming from fast moving objects. There are many algorithms based on several approaches, but the noisy environment stays the big issue. The paper introduces novel approach to the frequency estimation suited for weak suppressed carrier BPSK signal even below the noise level. Both the open loop version suitable for acquisition and the closed loop version with narrow band input more convenient for tracking are described.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131209814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128973
M. Stanek, M. Sigmund
This paper presents experimental study oriented on finding the most suitable polygon generated by Czech vowels for speaker recognition. For created speaker database containing 37 Czech native speakers, speaker variances have been observed by the length of vector created by two different centers of gravity for 16 different vowel polygons in 10 formant planes. The suitability is regarded by the dispersion coefficient of generated distance vectors and their minimal value. The most suitable vowel polygons have been set as EIOU25 tetragon and IOU34 vowel triangle reached the best results in both criteria. The dispersion of individual centers of gravity is much more suitable for speaker recognition generated by higher formants. Presented observations can be further used in the case of actual emotional state recognition or alcohol/drug detection.
{"title":"Speaker distinction using vowel polygons: Experimental study","authors":"M. Stanek, M. Sigmund","doi":"10.1109/RADIOELEK.2015.7128973","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128973","url":null,"abstract":"This paper presents experimental study oriented on finding the most suitable polygon generated by Czech vowels for speaker recognition. For created speaker database containing 37 Czech native speakers, speaker variances have been observed by the length of vector created by two different centers of gravity for 16 different vowel polygons in 10 formant planes. The suitability is regarded by the dispersion coefficient of generated distance vectors and their minimal value. The most suitable vowel polygons have been set as EIOU25 tetragon and IOU34 vowel triangle reached the best results in both criteria. The dispersion of individual centers of gravity is much more suitable for speaker recognition generated by higher formants. Presented observations can be further used in the case of actual emotional state recognition or alcohol/drug detection.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122423117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129000
Matus Pleva, J. Juhár, Andrew Simon Thiessen
The program Praat is a versatile speech analysis program, which becomes a standard in speech/language analysis scientific community. Automatic speech segmentation has been developed and used in Praat using a plugin called EasyAlign, which requires and input text (separated sentences) and clean audio recordings with quiet pauses between the sentences to operate. In this paper, a new functions will be evaluated and implemented into Praat to improve automatic speech segmentation processes and enables to process also noisy audio recordings with no input texts available. One of them is using also our own cloud based ASR (Automatic Speech recognition) solution developed. The results of the automatic speech recognition and different audio processing (noise-gate, de-noiser, normalization) were added into the Praat system to expand the EasyAlign functionality and improve the resulted automatic speech segmentation. The graphical output of the Praat also helps to visualize the automatic speech segmentation and also automatic speech recognition results for educational and system developers subjective evaluation purposes.
{"title":"Automatic Acoustic Speech segmentation in Praat using cloud based ASR","authors":"Matus Pleva, J. Juhár, Andrew Simon Thiessen","doi":"10.1109/RADIOELEK.2015.7129000","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129000","url":null,"abstract":"The program Praat is a versatile speech analysis program, which becomes a standard in speech/language analysis scientific community. Automatic speech segmentation has been developed and used in Praat using a plugin called EasyAlign, which requires and input text (separated sentences) and clean audio recordings with quiet pauses between the sentences to operate. In this paper, a new functions will be evaluated and implemented into Praat to improve automatic speech segmentation processes and enables to process also noisy audio recordings with no input texts available. One of them is using also our own cloud based ASR (Automatic Speech recognition) solution developed. The results of the automatic speech recognition and different audio processing (noise-gate, de-noiser, normalization) were added into the Praat system to expand the EasyAlign functionality and improve the resulted automatic speech segmentation. The graphical output of the Praat also helps to visualize the automatic speech segmentation and also automatic speech recognition results for educational and system developers subjective evaluation purposes.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127126092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129048
Deepak Joshi, S. Dash, R. Bhattacharjee, G. Trivedi
Analog circuit designing is an important aspect of VLSI chip design process. For the designing of analog circuits, electronic design automation tools need to be equipped with state-of-the-art efficient circuit analysis and optimization techniques. In this paper, a novel approach to optimize analog circuits (for gain, bandwidth and slew rate) is proposed using adjoint circuit analysis method. In this method an adjoint network of the original electrical (or electronic) circuit is constructed by using linearized circuit of the original electrical network in which MOS transistors are replaced by their small signal model. The objective function need to be analyzed for the optimization of analog circuit is evaluated using linearized circuit and its adjoint network (circuit) along with steepest descent method to find the next set of design parameters to optimize circuit in the design space. Barzilai and Borwein method is used to find the direction of design parameter vector during circuit optimization process. In this paper a basic cascode amplifier circuit has been designed at 180nm technology to prove the correctness of proposed method. To prove the effectiveness of the proposed approach, a two-stage operational amplifier circuit is also designed for gain optimization subject to a variety of design conditions and constraints. The solution of these circuits, designed with the optimized parameters calculated using our proposed method, matches with the solution of cascode amplifier and two-stage operational amplifier circuits designed using Mentor Graphics tool Pyxis (Eldo).
{"title":"A method of analog circuit optimization using adjoint sensitivity analysis","authors":"Deepak Joshi, S. Dash, R. Bhattacharjee, G. Trivedi","doi":"10.1109/RADIOELEK.2015.7129048","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129048","url":null,"abstract":"Analog circuit designing is an important aspect of VLSI chip design process. For the designing of analog circuits, electronic design automation tools need to be equipped with state-of-the-art efficient circuit analysis and optimization techniques. In this paper, a novel approach to optimize analog circuits (for gain, bandwidth and slew rate) is proposed using adjoint circuit analysis method. In this method an adjoint network of the original electrical (or electronic) circuit is constructed by using linearized circuit of the original electrical network in which MOS transistors are replaced by their small signal model. The objective function need to be analyzed for the optimization of analog circuit is evaluated using linearized circuit and its adjoint network (circuit) along with steepest descent method to find the next set of design parameters to optimize circuit in the design space. Barzilai and Borwein method is used to find the direction of design parameter vector during circuit optimization process. In this paper a basic cascode amplifier circuit has been designed at 180nm technology to prove the correctness of proposed method. To prove the effectiveness of the proposed approach, a two-stage operational amplifier circuit is also designed for gain optimization subject to a variety of design conditions and constraints. The solution of these circuits, designed with the optimized parameters calculated using our proposed method, matches with the solution of cascode amplifier and two-stage operational amplifier circuits designed using Mentor Graphics tool Pyxis (Eldo).","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126661619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128984
Filip Holík, J. Horalek, Sona Neradova, Stanislav Zitta, Martin Novak
Information is the essential building block of society and is found in each field of business. They can represent a business plan, personnel data, manufacturing know-how, financial transactions and many others. Information is part of company assets and thus has to be protected. This article describes methods of deploying security standards in a business environment. The practical part of the article describes implementation of Information Security Management System in a real automotive company located in the Czech Republic.
{"title":"Methods of deploying security standards in a business environment","authors":"Filip Holík, J. Horalek, Sona Neradova, Stanislav Zitta, Martin Novak","doi":"10.1109/RADIOELEK.2015.7128984","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128984","url":null,"abstract":"Information is the essential building block of society and is found in each field of business. They can represent a business plan, personnel data, manufacturing know-how, financial transactions and many others. Information is part of company assets and thus has to be protected. This article describes methods of deploying security standards in a business environment. The practical part of the article describes implementation of Information Security Management System in a real automotive company located in the Czech Republic.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116000063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128983
Filip Holík, J. Horalek, Sona Neradova, Martin Novak, Ondrej Marik
This article introduces the analysis of technologic options of deploying modern communication options for remote data collection from heat and water meters. The analysis is based on real requirements, data, and capabilities of the energy supplier in east Bohemia. An optimal solution enabling more accurate assessment of system load, efficiency improvement of conducted data collections, and deploying data transfer to eliminate faulty human factor during physically conducted meter readings, are suggested to the energy supplier based on the data.
{"title":"Communication technology for smart heat metering","authors":"Filip Holík, J. Horalek, Sona Neradova, Martin Novak, Ondrej Marik","doi":"10.1109/RADIOELEK.2015.7128983","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128983","url":null,"abstract":"This article introduces the analysis of technologic options of deploying modern communication options for remote data collection from heat and water meters. The analysis is based on real requirements, data, and capabilities of the energy supplier in east Bohemia. An optimal solution enabling more accurate assessment of system load, efficiency improvement of conducted data collections, and deploying data transfer to eliminate faulty human factor during physically conducted meter readings, are suggested to the energy supplier based on the data.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128527414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128989
J. Neburka, Zdenek Tlamsa, Vlastimil Benes, L. Polak, O. Kaller, L. Klozar, L. Bolecek, Ondrej Zach, Jan Kufa, J. Sebesta, T. Kratochvil
The number of wirelessly connected multimedia devices and different communication standards, supported by these devices, is rapidly increasing. However, the appropriate frequency bands (licensed and unlicensed) for data transmission by these standards are very limited. The rising density of wireless networks and their coexistence in the same or adjacent radio frequency (RF) spectrum can significantly decrease the quality of provided services. This paper deals with the study of coexistence between ZigBee (IEEE 802.15.4) and Wireless Fidelity (Wi-Fi) networks, including the IEEE 802.11b/g standards, which operate in the unlicensed Industrial, Scientific and Medical (ISM) band at 2.4 GHz. Firstly, a general simulation model was developed. Secondly, to verify results from simulation by measurement, an appropriate laboratory workplace in anechoic chamber was proposed and realized. Such setup and the measurement principle are briefly described in this paper too. Impact of the IEEE 802.11b/g networks on the ZigBee and vice versa is evaluated by dependence of bit error rate (BER) and error vector magnitude (EVM) on the power imbalance between power levels of considered RF signals, respectively.
{"title":"Study of the coexistence between ZigBee and Wi-Fi IEEE 802.11b/g networks in the ISM band","authors":"J. Neburka, Zdenek Tlamsa, Vlastimil Benes, L. Polak, O. Kaller, L. Klozar, L. Bolecek, Ondrej Zach, Jan Kufa, J. Sebesta, T. Kratochvil","doi":"10.1109/RADIOELEK.2015.7128989","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128989","url":null,"abstract":"The number of wirelessly connected multimedia devices and different communication standards, supported by these devices, is rapidly increasing. However, the appropriate frequency bands (licensed and unlicensed) for data transmission by these standards are very limited. The rising density of wireless networks and their coexistence in the same or adjacent radio frequency (RF) spectrum can significantly decrease the quality of provided services. This paper deals with the study of coexistence between ZigBee (IEEE 802.15.4) and Wireless Fidelity (Wi-Fi) networks, including the IEEE 802.11b/g standards, which operate in the unlicensed Industrial, Scientific and Medical (ISM) band at 2.4 GHz. Firstly, a general simulation model was developed. Secondly, to verify results from simulation by measurement, an appropriate laboratory workplace in anechoic chamber was proposed and realized. Such setup and the measurement principle are briefly described in this paper too. Impact of the IEEE 802.11b/g networks on the ZigBee and vice versa is evaluated by dependence of bit error rate (BER) and error vector magnitude (EVM) on the power imbalance between power levels of considered RF signals, respectively.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130591338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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