Pub Date : 2013-07-11DOI: 10.1109/ISSCS.2013.6651209
Ruxandra Tapu, B. Mocanu, E. Ţapu
In this paper we tackle the issue of video scene/DVD chapter segmentation. First, we introduce a review and analysis of the most salient methods existent in the technical literature. Then we propose a novel methodological framework for high level video temporal structuring and segmentation that extracts scenes/DVD chapters based on temporal constraints clustering, adaptive temporal lengths, neutralized shots and adaptive thresholding mechanism. The output of our method provides a structured video and facilitates the user access to different parts of the image sequence. In order to validate the proposed technique we have considered as low level visual features the interest points extracted using the SURF descriptor. The experimental evaluation validates the proposed approach returning an average score for the F1 norm of 82%.
{"title":"Automatic scene/DVD chapter extraction in Hollywoodian movies","authors":"Ruxandra Tapu, B. Mocanu, E. Ţapu","doi":"10.1109/ISSCS.2013.6651209","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651209","url":null,"abstract":"In this paper we tackle the issue of video scene/DVD chapter segmentation. First, we introduce a review and analysis of the most salient methods existent in the technical literature. Then we propose a novel methodological framework for high level video temporal structuring and segmentation that extracts scenes/DVD chapters based on temporal constraints clustering, adaptive temporal lengths, neutralized shots and adaptive thresholding mechanism. The output of our method provides a structured video and facilitates the user access to different parts of the image sequence. In order to validate the proposed technique we have considered as low level visual features the interest points extracted using the SURF descriptor. The experimental evaluation validates the proposed approach returning an average score for the F1 norm of 82%.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134200739","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651244
Dong-hwan Lee, Jonghong Kim, Wonyong Sung
Conventional error correction employing hard-decision decoding algorithms is not sufficient to correct all the bit errors in high density NAND flash memory. Recently, signal processing algorithms as well as soft-decision error correction are widely studied for improving error correcting performance. However, these techniques demand many memory sensing operations and, as a result, can lead to long sensing latency and high access energy. In this paper, we present optimum memory sensing schemes needed for estimation of threshold voltage distribution, cell-to-cell interference cancellation, and soft-decision error correction of NAND flash memory. We show the error performance improvement with each of these algorithms using simulated NAND flash memory.
{"title":"Optimum quantization for signal processing and error correction in NAND flash memory","authors":"Dong-hwan Lee, Jonghong Kim, Wonyong Sung","doi":"10.1109/ISSCS.2013.6651244","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651244","url":null,"abstract":"Conventional error correction employing hard-decision decoding algorithms is not sufficient to correct all the bit errors in high density NAND flash memory. Recently, signal processing algorithms as well as soft-decision error correction are widely studied for improving error correcting performance. However, these techniques demand many memory sensing operations and, as a result, can lead to long sensing latency and high access energy. In this paper, we present optimum memory sensing schemes needed for estimation of threshold voltage distribution, cell-to-cell interference cancellation, and soft-decision error correction of NAND flash memory. We show the error performance improvement with each of these algorithms using simulated NAND flash memory.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130930010","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651246
M. Fira, L. Goras, C. Barabasa
In this paper we investigate the reconstruction of compressed sensed ECG signals using dictionaries specific for each patient. Two projection matrices, random and Bernoulli, have been tested. For 24 records from the MIH-BIH database and for a compression ratio (CR) of 10:1 an average percentage root-mean-square difference (PRD) of 0.81, a normalized PRD (PRDN) of 15.49 and a quality score (QS) of 12.34 have been obtained. For record 117, for CR = 15:1 the PRD, PRDN and QS were 0.96, 17.28 and 15.62 respectively.
{"title":"Reconstruction of compressed sensed ECG signals using patient specific dictionaries","authors":"M. Fira, L. Goras, C. Barabasa","doi":"10.1109/ISSCS.2013.6651246","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651246","url":null,"abstract":"In this paper we investigate the reconstruction of compressed sensed ECG signals using dictionaries specific for each patient. Two projection matrices, random and Bernoulli, have been tested. For 24 records from the MIH-BIH database and for a compression ratio (CR) of 10:1 an average percentage root-mean-square difference (PRD) of 0.81, a normalized PRD (PRDN) of 15.49 and a quality score (QS) of 12.34 have been obtained. For record 117, for CR = 15:1 the PRD, PRDN and QS were 0.96, 17.28 and 15.62 respectively.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131020244","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651266
H. Gurkan, U. Guz, B. Yarman
In this work we present a novel biometric authentication approach based on combination of AC/DCT features, MFCC features, and QRS beat information of the ECG signals. The proposed approach is tested on a subset of 30 subjects selected from the PTB database. This subset consists of 13 healthy and 17 non-healthy subjects who have two ECG records. The proposed biometric authentication approach achieves average frame recognition rate of %97.31 on the selected subset. Our experimental results imply that the frame recognition rate of the proposed authentication approach is better than that of ACDCT and MFCC based biometric authentication systems, individually.
{"title":"A novel human identification system based on electrocardiogram features","authors":"H. Gurkan, U. Guz, B. Yarman","doi":"10.1109/ISSCS.2013.6651266","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651266","url":null,"abstract":"In this work we present a novel biometric authentication approach based on combination of AC/DCT features, MFCC features, and QRS beat information of the ECG signals. The proposed approach is tested on a subset of 30 subjects selected from the PTB database. This subset consists of 13 healthy and 17 non-healthy subjects who have two ECG records. The proposed biometric authentication approach achieves average frame recognition rate of %97.31 on the selected subset. Our experimental results imply that the frame recognition rate of the proposed authentication approach is better than that of ACDCT and MFCC based biometric authentication systems, individually.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133159316","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651202
Luigi Pormante, C. Rinaldi, Marco Santic, S. Tennina
Localization systems based on Wireless Sensor Networks (WSNs) have become very popular in recent years and location-awareness is a critical step for upcoming applications and communication systems. This paper presents a new localization algorithm through WSNs, which is based on Received Signal Strength (RSS) measurements. Although the localization accuracy obtained is comparable with existing literature algorithms, the proposed technique proves to be of practical implementation on devices with low computational capabilities as well as efficient in real-time usages. We verified such properties and investigated reachable precision through extensive experimental measurements on indoor and outdoor controlled scenarios, as well as on the real scenario offered by a flat equipped with domotic facilities to increase autonomy of people affected by disabilities.
{"title":"Performance analysis of a lightweight RSSI-based localization algorithm for Wireless Sensor Networks","authors":"Luigi Pormante, C. Rinaldi, Marco Santic, S. Tennina","doi":"10.1109/ISSCS.2013.6651202","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651202","url":null,"abstract":"Localization systems based on Wireless Sensor Networks (WSNs) have become very popular in recent years and location-awareness is a critical step for upcoming applications and communication systems. This paper presents a new localization algorithm through WSNs, which is based on Received Signal Strength (RSS) measurements. Although the localization accuracy obtained is comparable with existing literature algorithms, the proposed technique proves to be of practical implementation on devices with low computational capabilities as well as efficient in real-time usages. We verified such properties and investigated reachable precision through extensive experimental measurements on indoor and outdoor controlled scenarios, as well as on the real scenario offered by a flat equipped with domotic facilities to increase autonomy of people affected by disabilities.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128739262","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651175
C. Aghion, M. Lucanu, O. Ursaru, D. Mătăsaru
In this paper, we implemented on a microcontroller a modified-wave reference signal (DPWM-S2) modulated by an Inverted Sine Pulse Width Modulation (ISPWM). The microcontroller commands a three-phase asynchronous motor by means of a three-phase inverter. The results obtained from the practical application were compared to the ones obtained from a practical application using the reference signal (DPWM-S2) modulated by a triangular (classic) signal.
{"title":"Implementation of the ISPWM-DPWM-S2 technique on a microcontroller","authors":"C. Aghion, M. Lucanu, O. Ursaru, D. Mătăsaru","doi":"10.1109/ISSCS.2013.6651175","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651175","url":null,"abstract":"In this paper, we implemented on a microcontroller a modified-wave reference signal (DPWM-S2) modulated by an Inverted Sine Pulse Width Modulation (ISPWM). The microcontroller commands a three-phase asynchronous motor by means of a three-phase inverter. The results obtained from the practical application were compared to the ones obtained from a practical application using the reference signal (DPWM-S2) modulated by a triangular (classic) signal.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116125540","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651250
I. Ciocoiu
Pattern recognition performances of a special gradient-type dynamical system are investigated. The system exhibits stable equilibrium points whose positions are defined by the minima of a data-dependent Lyapunov function constructed using the Support Vector Data Description (SVDD) algorithm. Invariance to standard geometric transformations is inferred by combining SVDD with the tangent distance (TD), which has superior recognition performances when compared to the Euclidean distance. Experimental results using the USPS handwritten characters database and the Olivetti face images database confirm the superiority of the proposed approach over existing solutions.
{"title":"Invariant pattern recognition using SVDD-based associative memories","authors":"I. Ciocoiu","doi":"10.1109/ISSCS.2013.6651250","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651250","url":null,"abstract":"Pattern recognition performances of a special gradient-type dynamical system are investigated. The system exhibits stable equilibrium points whose positions are defined by the minima of a data-dependent Lyapunov function constructed using the Support Vector Data Description (SVDD) algorithm. Invariance to standard geometric transformations is inferred by combining SVDD with the tangent distance (TD), which has superior recognition performances when compared to the Euclidean distance. Experimental results using the USPS handwritten characters database and the Olivetti face images database confirm the superiority of the proposed approach over existing solutions.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121742501","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651173
B. Habib, G. Zaharia, G. El Zein
This paper presents a hardware simulator of Multiple-Input Multiple-Output (MIMO) propagation channels. The hardware simulator reproduces a desired radio channel and makes it possible to test “on table” different MIMO systems. A specific architecture of the digital block of the simulator is presented to characterize an outdoor scenario for Long Term Evolution (LTE) systems. An algorithm is introduced to switch between the impulse responses and to control the time variation of the delays. The new architecture is designed on a Xilinx Virtex-IV Field Programmable Gate Array (FPGA). Its accuracy, occupation on the FPGA and latency are analyzed.
{"title":"MIMO hardware simulator design for outdoor time-varying heterogeneous channels","authors":"B. Habib, G. Zaharia, G. El Zein","doi":"10.1109/ISSCS.2013.6651173","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651173","url":null,"abstract":"This paper presents a hardware simulator of Multiple-Input Multiple-Output (MIMO) propagation channels. The hardware simulator reproduces a desired radio channel and makes it possible to test “on table” different MIMO systems. A specific architecture of the digital block of the simulator is presented to characterize an outdoor scenario for Long Term Evolution (LTE) systems. An algorithm is introduced to switch between the impulse responses and to control the time variation of the delays. The new architecture is designed on a Xilinx Virtex-IV Field Programmable Gate Array (FPGA). Its accuracy, occupation on the FPGA and latency are analyzed.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123828228","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651217
M. Iordache, L. Dumitriu, L. Mandache, D. Niculae
The paper is focused on a useful application related to our optimization technique of the arrays of coupled oscillators at millimeter-wave frequencies, a pair of voltage-controlled oscillators coupled through a two-port passive network being treated. A distinct section of the paper is focused on a method to estimate unknown circuit parameters starting from measurements performed on the real system, the method being based on a minimization technique. Other part of the paper treats the optimization of certain performances of the system; we have chosen as objective function the phase shift of the oscillator pair, which is difficult to be adjusted in practice. We used an appropriate frequency space representation by means of the desired network function generated in full symbolic form for a linearized circuit model. This is combined with some measurements performed on the real system and a minimization algorithm for some scalar functions of multiple variables provided by Matlab Optimization Toolbox. The algorithm is suitable to compute optimal circuit parameters which guarantee the minimum respectively maximum values of the performance quantity. Linear or small-signal nonlinear circuits can be treated in this manner. The proposed optimization techniques was tested and validated with simulation data on an illustrative example.
{"title":"Parameter estimation and performance optimization of voltage controlled oscillators","authors":"M. Iordache, L. Dumitriu, L. Mandache, D. Niculae","doi":"10.1109/ISSCS.2013.6651217","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651217","url":null,"abstract":"The paper is focused on a useful application related to our optimization technique of the arrays of coupled oscillators at millimeter-wave frequencies, a pair of voltage-controlled oscillators coupled through a two-port passive network being treated. A distinct section of the paper is focused on a method to estimate unknown circuit parameters starting from measurements performed on the real system, the method being based on a minimization technique. Other part of the paper treats the optimization of certain performances of the system; we have chosen as objective function the phase shift of the oscillator pair, which is difficult to be adjusted in practice. We used an appropriate frequency space representation by means of the desired network function generated in full symbolic form for a linearized circuit model. This is combined with some measurements performed on the real system and a minimization algorithm for some scalar functions of multiple variables provided by Matlab Optimization Toolbox. The algorithm is suitable to compute optimal circuit parameters which guarantee the minimum respectively maximum values of the performance quantity. Linear or small-signal nonlinear circuits can be treated in this manner. The proposed optimization techniques was tested and validated with simulation data on an illustrative example.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125586005","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 : 2013-07-11DOI: 10.1109/ISSCS.2013.6651229
Hui Ji, G. Zaharia, J. Hélard
In this paper, we propose a new differential space-time modulation (DSTM) scheme for 4×4 multiple input multiple output (MIMO) systems. This scheme is used for MIMO systems where the channel coefficients are not available at both the transmitters and the receivers. The transmission matrix used in this scheme is based on the Weyl group. Simulation results show that this new scheme with four transmit antennas outperforms the well-known Tarokh's differential space-time block coding (DSTBC) scheme. The spectral efficiency of this scheme can be up to 3 bps/Hz.
{"title":"A new differential space-time modulation scheme based on Weyl group","authors":"Hui Ji, G. Zaharia, J. Hélard","doi":"10.1109/ISSCS.2013.6651229","DOIUrl":"https://doi.org/10.1109/ISSCS.2013.6651229","url":null,"abstract":"In this paper, we propose a new differential space-time modulation (DSTM) scheme for 4×4 multiple input multiple output (MIMO) systems. This scheme is used for MIMO systems where the channel coefficients are not available at both the transmitters and the receivers. The transmission matrix used in this scheme is based on the Weyl group. Simulation results show that this new scheme with four transmit antennas outperforms the well-known Tarokh's differential space-time block coding (DSTBC) scheme. The spectral efficiency of this scheme can be up to 3 bps/Hz.","PeriodicalId":260263,"journal":{"name":"International Symposium on Signals, Circuits and Systems ISSCS2013","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129467102","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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