Pub Date : 2017-07-01DOI: 10.1109/ISSCS.2017.8034880
M. Ivanovici, N. Richard
The notion of complexity is widely-known and used. Various definitions of complexity exist: the Hausdorff dimension, fractal dimension, Kolmogorov complexity, Krohn-Rhodes complexity, Lyapunov exponents or the entropy, some of them with several definitions. All these measures were defined strictly for mathematical objects, but they may apply to real signals like texture images in particular. We are interested in new definitions of complexity or how the existing ones can be extended to color and spectral texture images. In this paper, we propose the definition of a naive complexity measure for color texture images as three times the number of colors divided by the image resolution. We show that such a simple definition may have interesting properties, by comparing its performance to the color entropy previously defined. We show and discuss our experimental results, then draw the conclusions.
{"title":"A Naive Complexity Measure for color texture images","authors":"M. Ivanovici, N. Richard","doi":"10.1109/ISSCS.2017.8034880","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034880","url":null,"abstract":"The notion of complexity is widely-known and used. Various definitions of complexity exist: the Hausdorff dimension, fractal dimension, Kolmogorov complexity, Krohn-Rhodes complexity, Lyapunov exponents or the entropy, some of them with several definitions. All these measures were defined strictly for mathematical objects, but they may apply to real signals like texture images in particular. We are interested in new definitions of complexity or how the existing ones can be extended to color and spectral texture images. In this paper, we propose the definition of a naive complexity measure for color texture images as three times the number of colors divided by the image resolution. We show that such a simple definition may have interesting properties, by comparing its performance to the color entropy previously defined. We show and discuss our experimental results, then draw the conclusions.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132411484","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034908
C. Vertan, C. Florea, L. Florea, Mihai-Sorin Badea
The Otsu thresholding is a classical binarization method that partitions graylevel images according to a within-class variance minimization principle. The Otsu method is a particular case of the general Lloyd-Max optimal quantization. We propose the alternative use of Otsu/Lloyd thresholds, computed locally, as local features that describe the image content. This description can be used directly within a content-based image retrieval framework, or it can be reused in the definition of new Local Binary Pattern variants. Texture retrieval experiments show that the proposed approaches lead to performance improvement under specific constraints.
{"title":"Reusing the Otsu threshold beyond segmentation","authors":"C. Vertan, C. Florea, L. Florea, Mihai-Sorin Badea","doi":"10.1109/ISSCS.2017.8034908","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034908","url":null,"abstract":"The Otsu thresholding is a classical binarization method that partitions graylevel images according to a within-class variance minimization principle. The Otsu method is a particular case of the general Lloyd-Max optimal quantization. We propose the alternative use of Otsu/Lloyd thresholds, computed locally, as local features that describe the image content. This description can be used directly within a content-based image retrieval framework, or it can be reused in the definition of new Local Binary Pattern variants. Texture retrieval experiments show that the proposed approaches lead to performance improvement under specific constraints.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130870400","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034878
D. Aiordachioaie, T. Popescu
The Wigner-Ville distribution (WVD) is highly appreciated and used in the area of time-frequency transforms, but the problem of cross terms still remains. A simple idea is presented, as starting point to design a method to remove the cross terms and to obtain an accurate image of WVD, having only the auto terms. The idea uses the fact that the extreme (lateral) terms from WVD are always auto terms and a change in an auto term generates a change in at least one cross term. The identification of the auto terms is based on Renyi entropy, computed on the rows and columns of the WVD matrix, which has a minimum value for auto terms. An iterative method is next considered, which filter a component at each processing step. Finally, a WVD is obtained with auto terms only. The method is designed for non-overlapping multicomponent signals, without modulation. The results are promising.
{"title":"A method to detect and filter the cross terms in the Wigner-Ville distribution","authors":"D. Aiordachioaie, T. Popescu","doi":"10.1109/ISSCS.2017.8034878","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034878","url":null,"abstract":"The Wigner-Ville distribution (WVD) is highly appreciated and used in the area of time-frequency transforms, but the problem of cross terms still remains. A simple idea is presented, as starting point to design a method to remove the cross terms and to obtain an accurate image of WVD, having only the auto terms. The idea uses the fact that the extreme (lateral) terms from WVD are always auto terms and a change in an auto term generates a change in at least one cross term. The identification of the auto terms is based on Renyi entropy, computed on the rows and columns of the WVD matrix, which has a minimum value for auto terms. An iterative method is next considered, which filter a component at each processing step. Finally, a WVD is obtained with auto terms only. The method is designed for non-overlapping multicomponent signals, without modulation. The results are promising.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122870862","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034868
Ana-Mirela Rotopanescu, L. Trifina, D. Tarniceriu
Quadrature Amplitude Modulation (QAM) is an important modulation scheme with many practical applications, including current and future wireless technologies. The performance of a mobile communication system can be improved by using a doubly iterative decoding scheme for space-time turbo codes with a large number of transmit and receive antennas, where the decoder uses preliminary soft values of the coded symbols. In this paper, the soft estimates for a high QAM order are derived and explained.
{"title":"Soft estimates for doubly iterative decoding of space-time turbo codes using M-ary Quadrature Amplitude Modulation","authors":"Ana-Mirela Rotopanescu, L. Trifina, D. Tarniceriu","doi":"10.1109/ISSCS.2017.8034868","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034868","url":null,"abstract":"Quadrature Amplitude Modulation (QAM) is an important modulation scheme with many practical applications, including current and future wireless technologies. The performance of a mobile communication system can be improved by using a doubly iterative decoding scheme for space-time turbo codes with a large number of transmit and receive antennas, where the decoder uses preliminary soft values of the coded symbols. In this paper, the soft estimates for a high QAM order are derived and explained.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124360648","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034934
P. Astola, I. Tabus
High resolution disparity images are stored in floating point raw files, where the number of bits per pixel is typically 32, although the number of used bits when converted to a fixed point representation is lower, e.g., between 24 and 26 in the dataset used in our experiments. In order to compress images with such high dynamic range, the bitplanes of the original image are combined into integer images with at most 16 bits, for which readily existing compressors are available. We introduce first a context predictive compressor (CPC) which can operate on integer images having more than 16 bits. The proposed overall compression scheme uses a first revertible linear transformation of the image as a first decorrelation process, and then splits the transformed image into integer images with smaller dynamic range, which are finally encoded. We experiment with schemes of split-into-2 and split-into-3, with combinations of several existing compressors for the integer image components and show that the newly introduced CPC operating over the least significant bitplanes combined with CERV operating over the most significant bitplanes achieves always the best compression, with final lossless compressed results of between 8 and 12 bits per pixel.
{"title":"Lossless compression of high resolution disparity map images","authors":"P. Astola, I. Tabus","doi":"10.1109/ISSCS.2017.8034934","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034934","url":null,"abstract":"High resolution disparity images are stored in floating point raw files, where the number of bits per pixel is typically 32, although the number of used bits when converted to a fixed point representation is lower, e.g., between 24 and 26 in the dataset used in our experiments. In order to compress images with such high dynamic range, the bitplanes of the original image are combined into integer images with at most 16 bits, for which readily existing compressors are available. We introduce first a context predictive compressor (CPC) which can operate on integer images having more than 16 bits. The proposed overall compression scheme uses a first revertible linear transformation of the image as a first decorrelation process, and then splits the transformed image into integer images with smaller dynamic range, which are finally encoded. We experiment with schemes of split-into-2 and split-into-3, with combinations of several existing compressors for the integer image components and show that the newly introduced CPC operating over the least significant bitplanes combined with CERV operating over the most significant bitplanes achieves always the best compression, with final lossless compressed results of between 8 and 12 bits per pixel.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114106239","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034881
Marilena Stănculescu, M. Iordache, Maria-Lavinia Iordache, D. Niculae, V. Bucata
In this paper a series of constants, corresponding to wireless power transfer system (WPTS), are defined, function of S parameters. These constants will be further used for stability factors computation in WPTS. To generate: the reflection coefficients, the standing wave ratio (SWR), the input and output impedances, the input and output active power transmission efficiency, the signal transmission efficiency, the power gains, the various stability coefficients, the centers and radius corresponding to stability circles from the source and from the generator, the S, T, Z and Y matrices and the Smith charts, we developed dedicated functions by using existing routines from the MATLAB Microwave toolbox. The results obtained by simulations were compared to those existing in literature and with experimental ones.
{"title":"The use of S parameters in wireless power transfer system stability","authors":"Marilena Stănculescu, M. Iordache, Maria-Lavinia Iordache, D. Niculae, V. Bucata","doi":"10.1109/ISSCS.2017.8034881","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034881","url":null,"abstract":"In this paper a series of constants, corresponding to wireless power transfer system (WPTS), are defined, function of S parameters. These constants will be further used for stability factors computation in WPTS. To generate: the reflection coefficients, the standing wave ratio (SWR), the input and output impedances, the input and output active power transmission efficiency, the signal transmission efficiency, the power gains, the various stability coefficients, the centers and radius corresponding to stability circles from the source and from the generator, the S, T, Z and Y matrices and the Smith charts, we developed dedicated functions by using existing routines from the MATLAB Microwave toolbox. The results obtained by simulations were compared to those existing in literature and with experimental ones.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115303384","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034936
Ioan-Alexandru Nica, Viorel-Stefan Savinescu, L. Goras
In this paper an improved small-signal model of an active inductor taking into consideration active and biasing transistors parasitics is presented. It is shown that the effect of the biasing resistance of the cascode transistor increases to three the order of the system. The influence of the parasitic elements on stability and a noise analysis of the circuit are studied as well.
{"title":"On the modeling of an active resonator","authors":"Ioan-Alexandru Nica, Viorel-Stefan Savinescu, L. Goras","doi":"10.1109/ISSCS.2017.8034936","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034936","url":null,"abstract":"In this paper an improved small-signal model of an active inductor taking into consideration active and biasing transistors parasitics is presented. It is shown that the effect of the biasing resistance of the cascode transistor increases to three the order of the system. The influence of the parasitic elements on stability and a noise analysis of the circuit are studied as well.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115347278","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034926
Marius Constantin Vochin, Hayder Al-Amily
The increasing number of personal and commercial vehicles in transit induces a high volume of road traffic, which can often lead to serious incidents such as permanent traffic jams, increased gas pollution, accidents with material or even human losses. Technology and transportation infrastructure providers are required to provide safer, more scalable, flexible, and cost effective solutions to these problems. Intelligent Transportation Systems (ITS) have been developed to meet these requests, by offering traffic monitoring, guidance or alerting communication capabilities to or between vehicles, or intelligent infrastructure safety elements. This paper investigates the possibility of using common hardware such as a smart phone to achieve V2V or V2I communication, as a solution to implement offline alerting capabilities in Intelligent System for Vehicle Navigation Assistance (SIAN) research project.
{"title":"Mobile communication application for V2V systems","authors":"Marius Constantin Vochin, Hayder Al-Amily","doi":"10.1109/ISSCS.2017.8034926","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034926","url":null,"abstract":"The increasing number of personal and commercial vehicles in transit induces a high volume of road traffic, which can often lead to serious incidents such as permanent traffic jams, increased gas pollution, accidents with material or even human losses. Technology and transportation infrastructure providers are required to provide safer, more scalable, flexible, and cost effective solutions to these problems. Intelligent Transportation Systems (ITS) have been developed to meet these requests, by offering traffic monitoring, guidance or alerting communication capabilities to or between vehicles, or intelligent infrastructure safety elements. This paper investigates the possibility of using common hardware such as a smart phone to achieve V2V or V2I communication, as a solution to implement offline alerting capabilities in Intelligent System for Vehicle Navigation Assistance (SIAN) research project.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115575183","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034928
George Mufungulwa, Hiroshi Tsutsui, Y. Miyanaga, Shin-ichi Abe, Mitsuru Ochi
This paper proposes a new noisy robust speech recognition method. Under noise circumstances, several noise reduction methods have been developed and they are applied in various noise conditions. However, in case of similar pronunciation speech, for example, it is still not easy to realize high recognition accuracy. In this paper, the new processing algorithm into speech modulation spectrum is proposed as running spectrum analysis (RSA) and it is adequately applied to observed speech data. Using this method, the proposed system can improve about 1 – 4 % compared to current conventional methods.
{"title":"Robust speech recognition for similar Japanese pronunciation phrases under noisy conditions","authors":"George Mufungulwa, Hiroshi Tsutsui, Y. Miyanaga, Shin-ichi Abe, Mitsuru Ochi","doi":"10.1109/ISSCS.2017.8034928","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034928","url":null,"abstract":"This paper proposes a new noisy robust speech recognition method. Under noise circumstances, several noise reduction methods have been developed and they are applied in various noise conditions. However, in case of similar pronunciation speech, for example, it is still not easy to realize high recognition accuracy. In this paper, the new processing algorithm into speech modulation spectrum is proposed as running spectrum analysis (RSA) and it is adequately applied to observed speech data. Using this method, the proposed system can improve about 1 – 4 % compared to current conventional methods.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124925406","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 : 2017-07-01DOI: 10.1109/ISSCS.2017.8034867
L. Stanciu, V. Stanciu, C. Stanciu
This paper presents a design method of the audio digital appodizing filters, by using B-spline and continuous polynomial functions in the transition frequency band. It is known that an appodizing filter can be used to control the time smear for a recording and a reproducing chain. The choice of the frequency response above 20 kHz can reduce the time extent of the impulse response. In the proposed approach, the appodizing filter is optimized with the novelty of using spline functions and continuous polynomials in the transition band. Several design examples are included to illustrate the proposed algorithm.
{"title":"Digital apodizing filters design by using B-spline functions and continuous polynomials","authors":"L. Stanciu, V. Stanciu, C. Stanciu","doi":"10.1109/ISSCS.2017.8034867","DOIUrl":"https://doi.org/10.1109/ISSCS.2017.8034867","url":null,"abstract":"This paper presents a design method of the audio digital appodizing filters, by using B-spline and continuous polynomial functions in the transition frequency band. It is known that an appodizing filter can be used to control the time smear for a recording and a reproducing chain. The choice of the frequency response above 20 kHz can reduce the time extent of the impulse response. In the proposed approach, the appodizing filter is optimized with the novelty of using spline functions and continuous polynomials in the transition band. Several design examples are included to illustrate the proposed algorithm.","PeriodicalId":338255,"journal":{"name":"2017 International Symposium on Signals, Circuits and Systems (ISSCS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124935724","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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