Pub Date : 2009-11-01DOI: 10.1109/ICSCS.2009.5412292
K. Abida, F. Karray, W. Abida
Phoneme recognition is an essential component of any robust speech decoder and has been tackled by many researchers. Speech feature extraction constitutes the front end module of any speech decoder: it plays an essential role and has a strong impact on the recognition performance. The research community is aggressively searching for more powerful solutions which combine the existing feature extraction methods for a better and more reliable information capture from the analog speech signal. In this research work, we propose new approaches to combining phoneme recognizers' output in order to provide better recognition performance and improved robustness with respect to noise and channel distortions. Machine learning tools such as the Naive Bayes Classifier, Decision Trees, and Support Vector Machines have been used in the combination of hypotheses. Experiments under different SNR levels have proven that our proposed approach outperforms the two most common feature extraction techniques, namely Mel Frequency Cepstral Coefficients (MFCC) and Perceptual Linear Prediction(PLP) with Cepstral Mean Subtraction (CMS) and RASTA respectively, for channel normalization.
{"title":"Combined speech decoders output for phoneme recognition enhancement","authors":"K. Abida, F. Karray, W. Abida","doi":"10.1109/ICSCS.2009.5412292","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412292","url":null,"abstract":"Phoneme recognition is an essential component of any robust speech decoder and has been tackled by many researchers. Speech feature extraction constitutes the front end module of any speech decoder: it plays an essential role and has a strong impact on the recognition performance. The research community is aggressively searching for more powerful solutions which combine the existing feature extraction methods for a better and more reliable information capture from the analog speech signal. In this research work, we propose new approaches to combining phoneme recognizers' output in order to provide better recognition performance and improved robustness with respect to noise and channel distortions. Machine learning tools such as the Naive Bayes Classifier, Decision Trees, and Support Vector Machines have been used in the combination of hypotheses. Experiments under different SNR levels have proven that our proposed approach outperforms the two most common feature extraction techniques, namely Mel Frequency Cepstral Coefficients (MFCC) and Perceptual Linear Prediction(PLP) with Cepstral Mean Subtraction (CMS) and RASTA respectively, for channel normalization.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115833229","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412701
L. Meddeber, N. Berrached, Abdelmalik Taleb-Ahmed
Image registration is an inevitable problem arising in many image-processing applications whenever two or more images of the same scene have to be compared pixel by pixel. The increased volume of satellite images has reinforced the need for automatic image registration methods. In this paper, two new feature-based approaches to automated image-to-image registration are presented. The characteristic of the first approach is that it combines an invariant moment shape descriptor with improved chain-code matching to establish correspondences between the potentially matched regions detected from the two images. This method works well for image pairs in which the contour information is well preserved, such as the optical images from Landsat and Spot satellites. For the registration of the optical images with synthetic aperture radar (SAR) images, we propose another method based on the wavelet transform, this second method uses spectral information of the images and their local wavelet transform modulus maxima to extract a set of control points. The experimental result demonstrates the robustness, efficiency and accuracy of the two algorithms.
{"title":"An automatic registration and mosaicking system based on contour features and wavelet transform for remote sensing images","authors":"L. Meddeber, N. Berrached, Abdelmalik Taleb-Ahmed","doi":"10.1109/ICSCS.2009.5412701","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412701","url":null,"abstract":"Image registration is an inevitable problem arising in many image-processing applications whenever two or more images of the same scene have to be compared pixel by pixel. The increased volume of satellite images has reinforced the need for automatic image registration methods. In this paper, two new feature-based approaches to automated image-to-image registration are presented. The characteristic of the first approach is that it combines an invariant moment shape descriptor with improved chain-code matching to establish correspondences between the potentially matched regions detected from the two images. This method works well for image pairs in which the contour information is well preserved, such as the optical images from Landsat and Spot satellites. For the registration of the optical images with synthetic aperture radar (SAR) images, we propose another method based on the wavelet transform, this second method uses spectral information of the images and their local wavelet transform modulus maxima to extract a set of control points. The experimental result demonstrates the robustness, efficiency and accuracy of the two algorithms.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132044470","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412256
H. Samaali, F. Najar, S. Choura, A. Nayfeh, M. Masmoudi
In this paper, we propose the design of an ohmic contact RF microswitch with low voltage actuation, where the upper and lower microplates are displaceable. We develop a mathematical model for the RF microswitch made up of two electrostatically-actuated microplates; each microplate is attached to the end of a microcantilever. We assume that the microbeam is flexible, the microplates are rigid bodies and the electrostatic force is nonlinear function of the displacement and voltage applied between the microplates. We formulate the static and eigenvalue problems associated with the proposed microsystem. We show that the resulting static pull-in voltage and switching time are reduced by 30 and 45%, respectively, as compared to those associated with a RF microswitch formed of a single microbeam-microplate system. We also show that, unlike the second and higher frequencies, a selected range of applied DC voltages, affects significantly the first frequency.
{"title":"Novel design of MEMS ohmic RF switch with low voltage actuation","authors":"H. Samaali, F. Najar, S. Choura, A. Nayfeh, M. Masmoudi","doi":"10.1109/ICSCS.2009.5412256","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412256","url":null,"abstract":"In this paper, we propose the design of an ohmic contact RF microswitch with low voltage actuation, where the upper and lower microplates are displaceable. We develop a mathematical model for the RF microswitch made up of two electrostatically-actuated microplates; each microplate is attached to the end of a microcantilever. We assume that the microbeam is flexible, the microplates are rigid bodies and the electrostatic force is nonlinear function of the displacement and voltage applied between the microplates. We formulate the static and eigenvalue problems associated with the proposed microsystem. We show that the resulting static pull-in voltage and switching time are reduced by 30 and 45%, respectively, as compared to those associated with a RF microswitch formed of a single microbeam-microplate system. We also show that, unlike the second and higher frequencies, a selected range of applied DC voltages, affects significantly the first frequency.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134303690","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412252
P. Drexler, R. Kubasek
In order to the fiber linear birefringence compensation a promising method was chosen for pulsed current sensor design. The method employs orthogonal polarization conjugation by the back direction propagation of the light wave in the fiber. The Jones calculus analysis presents its propriety. An experimental fiber optic current sensor has been designed and realized. The advantage of the proposed method was proved considering to the sensitivity improvement.
{"title":"Pulsed magnetic field fiber optic sensor","authors":"P. Drexler, R. Kubasek","doi":"10.1109/ICSCS.2009.5412252","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412252","url":null,"abstract":"In order to the fiber linear birefringence compensation a promising method was chosen for pulsed current sensor design. The method employs orthogonal polarization conjugation by the back direction propagation of the light wave in the fiber. The Jones calculus analysis presents its propriety. An experimental fiber optic current sensor has been designed and realized. The advantage of the proposed method was proved considering to the sensitivity improvement.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132692125","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5414188
F. Baronti, E. Marraccini, R. Roncella, R. Saletti, G. Manni, G. Palama
This paper describes a multi-sensor acquisition system, capable of acquiring data and decoding digital protocols from many different electronic controlled systems installed on-board a luxury motor yacht, with a single hardware-software unit. The acquisition system is remotely connected to the company yacht database, so that it is automatically configured to handle the production test of a specific model among hundreds of possible different yachts, each one with its specific sensor and subsystem configuration. It consists of a hardware section (a PC provided with several converters that make the data available on a USB bus) and a software package that collects the data, decodes the digital protocols (NMEA 0183, CAN J1939, TCP/IP, etc.) and provides a common interface for visualization, data storage and test management. A wireless 2-axis inclinometer, not available on board, has also been designed, realized and integrated as a further sensor to be acquired. The acquisition system has extensively been utilized in the characterization of many different models and has proved a significant improvement in the yacht production tests, making this phase rigorous, documented, shorter and thus much cheaper and efficient than before.
本文介绍了一种多传感器采集系统，该系统能够从安装在豪华机动游艇上的许多不同的电子控制系统中采集数据并解码数字协议，只需一个硬件软件单元。采集系统远程连接到公司的游艇数据库，因此它可以自动配置来处理数百种不同游艇中特定型号的生产测试，每种游艇都有其特定的传感器和子系统配置。它由硬件部分(配备若干转换器的PC机，使数据在USB总线上可用)和软件包组成，该软件包收集数据，解码数字协议(NMEA 0183, CAN J1939, TCP/IP等)，并提供可视化，数据存储和测试管理的公共接口。此外，还设计、实现并集成了一种无线两轴倾角仪，作为一种待获取的传感器。该采集系统已广泛应用于许多不同型号的表征，并在游艇生产测试中证明了显著的改进，使这一阶段严格、有记录、更短，因此比以前更便宜、更高效。
{"title":"Multi-sensor multi-protocol acquisition system for luxury-yacht production test and characterization","authors":"F. Baronti, E. Marraccini, R. Roncella, R. Saletti, G. Manni, G. Palama","doi":"10.1109/ICSCS.2009.5414188","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5414188","url":null,"abstract":"This paper describes a multi-sensor acquisition system, capable of acquiring data and decoding digital protocols from many different electronic controlled systems installed on-board a luxury motor yacht, with a single hardware-software unit. The acquisition system is remotely connected to the company yacht database, so that it is automatically configured to handle the production test of a specific model among hundreds of possible different yachts, each one with its specific sensor and subsystem configuration. It consists of a hardware section (a PC provided with several converters that make the data available on a USB bus) and a software package that collects the data, decodes the digital protocols (NMEA 0183, CAN J1939, TCP/IP, etc.) and provides a common interface for visualization, data storage and test management. A wireless 2-axis inclinometer, not available on board, has also been designed, realized and integrated as a further sensor to be acquired. The acquisition system has extensively been utilized in the characterization of many different models and has proved a significant improvement in the yacht production tests, making this phase rigorous, documented, shorter and thus much cheaper and efficient than before.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114350573","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412699
M. Ouertani, Hichem Besbes, A. Bouallègue
In this paper, we propose to design time limited bi-orthogonals pulses shapes for ultra wideband (UWB) communication system proposed in. The proposed design pulses technique is based on searching the optimal pulse on a sub-field spanned by set of orthogonal functions built from the modified Hermite function. The design problem can be formulated as a linearly constrained convex problem. Simulations results, show that the synthesized pulses conform to the spectral emission constraints.
{"title":"Bi-orthogonal pulse design based on Hermite functions for UWB communications","authors":"M. Ouertani, Hichem Besbes, A. Bouallègue","doi":"10.1109/ICSCS.2009.5412699","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412699","url":null,"abstract":"In this paper, we propose to design time limited bi-orthogonals pulses shapes for ultra wideband (UWB) communication system proposed in. The proposed design pulses technique is based on searching the optimal pulse on a sub-field spanned by set of orthogonal functions built from the modified Hermite function. The design problem can be formulated as a linearly constrained convex problem. Simulations results, show that the synthesized pulses conform to the spectral emission constraints.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"2007 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117065622","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5414167
R. Kubasek, Mouin Al Khaddour
The article describes the basic study of broadband noise signal application in the investigation of materials. The aim is to find a metrology method utilizable for the research on metamaterials in the frequency range of about 100 MHz to 10 GHz. The instrumental equipment and other requirements are presented. This article provides an overview of the current potentialities in the described field and summarizes the aspects necessary for noise spectroscopy.
{"title":"Noise generator for noise spectroscopy","authors":"R. Kubasek, Mouin Al Khaddour","doi":"10.1109/ICSCS.2009.5414167","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5414167","url":null,"abstract":"The article describes the basic study of broadband noise signal application in the investigation of materials. The aim is to find a metrology method utilizable for the research on metamaterials in the frequency range of about 100 MHz to 10 GHz. The instrumental equipment and other requirements are presented. This article provides an overview of the current potentialities in the described field and summarizes the aspects necessary for noise spectroscopy.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117325361","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412598
J. D. Battista, P. Perdu, J. Courrège, B. Rouzeyre, L. Torres
Failure analysis tools and methods can be used for security purposes as well as the security attack techniques can be used in failure analysis. In this paper, we describe the last results obtained concerning light emission techniques and their use to set up a side channel methodology. From a cryptanalyst standpoint, the light emission could be a potential source of leakage. When studying a specific cipher algorithm implemented in a device, by analysing this new kind of leakage it is possible to retrieve secret sensitive data. We made our analyses on an FPGA device, which makes the attack harder to perform than on a standard ASIC. Furthermore, the technique was validated on a device in 0.13µm technology, resulting in a more complex sample preparation from backside. We will show that, the leakage due to the light emitted during normal operation of a CMOS circuit, can be used to set up an attack based on the well-known DPA technique.
{"title":"Validation of differential light emission analysis on FPGA","authors":"J. D. Battista, P. Perdu, J. Courrège, B. Rouzeyre, L. Torres","doi":"10.1109/ICSCS.2009.5412598","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412598","url":null,"abstract":"Failure analysis tools and methods can be used for security purposes as well as the security attack techniques can be used in failure analysis. In this paper, we describe the last results obtained concerning light emission techniques and their use to set up a side channel methodology. From a cryptanalyst standpoint, the light emission could be a potential source of leakage. When studying a specific cipher algorithm implemented in a device, by analysing this new kind of leakage it is possible to retrieve secret sensitive data. We made our analyses on an FPGA device, which makes the attack harder to perform than on a standard ASIC. Furthermore, the technique was validated on a device in 0.13µm technology, resulting in a more complex sample preparation from backside. We will show that, the leakage due to the light emitted during normal operation of a CMOS circuit, can be used to set up an attack based on the well-known DPA technique.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117095834","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5414182
C. Efstathiou, I. Voyiatzis
In this work efficient architectures of modulo 2n+1 subtractors for diminished-1 operands which can handle zero operand are presented. The proposed subtractors have similar architecture, operate at the same speed and have the same area complexity compared to their corresponding modulo 2n+1 adders for diminished-1 operands. Efficient modulo 2n+1 adder/subtractor architectures for diminished-1 operands, which are welcomed in RNS applications, are also proposed.
{"title":"Handling zero in diminished-1 modulo 2n + 1 subtraction","authors":"C. Efstathiou, I. Voyiatzis","doi":"10.1109/ICSCS.2009.5414182","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5414182","url":null,"abstract":"In this work efficient architectures of modulo 2n+1 subtractors for diminished-1 operands which can handle zero operand are presented. The proposed subtractors have similar architecture, operate at the same speed and have the same area complexity compared to their corresponding modulo 2n+1 adders for diminished-1 operands. Efficient modulo 2n+1 adder/subtractor architectures for diminished-1 operands, which are welcomed in RNS applications, are also proposed.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129349538","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412607
R. Istenic, D. Zazula
In this paper, the influence of overlapping of pulse signal sources on their correlation matrix and activity index is studied. The activity index is defined as a Mahalanobis distance of signal observations. Influences of source overlapping on activity index were simulated for a different number of overlapping sources and degrees of their overlapping. The findings lead to an improved model of activity index, which can support a more reliable estimation of the number of active sources in convolutive mixtures of pulse sources.
{"title":"The influence of source overlapping on correlation matrix and activity index","authors":"R. Istenic, D. Zazula","doi":"10.1109/ICSCS.2009.5412607","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412607","url":null,"abstract":"In this paper, the influence of overlapping of pulse signal sources on their correlation matrix and activity index is studied. The activity index is defined as a Mahalanobis distance of signal observations. Influences of source overlapping on activity index were simulated for a different number of overlapping sources and degrees of their overlapping. The findings lead to an improved model of activity index, which can support a more reliable estimation of the number of active sources in convolutive mixtures of pulse sources.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127068023","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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