Pub Date : 2005-12-06DOI: 10.1109/ICICS.2005.1689186
Ducpyo Hong, Jinmok Lee, Jaeho Choi
This paper deals with the monitoring of power quality (PQ) variations continuously using power line communication (PLC). The power quality monitoring (PQM) has some merits to send and receive the PQ information without any new network lines as usual as in LAN communication. The PLC hardware and software techniques for PQM that meets the categories of IEEE Std. 1159 are described in this paper with some experimental results and also, this research shows that this system can be effectively applied for the power management of end user
{"title":"Power Quality Monitoring System Using Power Line Communication","authors":"Ducpyo Hong, Jinmok Lee, Jaeho Choi","doi":"10.1109/ICICS.2005.1689186","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689186","url":null,"abstract":"This paper deals with the monitoring of power quality (PQ) variations continuously using power line communication (PLC). The power quality monitoring (PQM) has some merits to send and receive the PQ information without any new network lines as usual as in LAN communication. The PLC hardware and software techniques for PQM that meets the categories of IEEE Std. 1159 are described in this paper with some experimental results and also, this research shows that this system can be effectively applied for the power management of end user","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116804154","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689204
Jing-Ming Guo
In this paper, the well known least-mean-square (LMS) method is applied for designing an adaptive filter used to produce a high quality halftone image. The experimental results show that the proposed LMS-designed halftoning achieves the extra benefit of edge enhancement and eliminates the annoying worm effect in error-diffused image. In addition, we provide two data hiding applications, named direct embedding LMS-designed halftone technique (DELDH) and information sharing LMS-designed halftone technique (ISLDH) to demonstrate the performance of the proposed LMS-designed halftoning. As the experimental results demonstrated, both techniques achieve excellent image quality and decoded visual patterns
{"title":"A New Digital Haiftoning and Data Hiding Designed with LMS Optimization","authors":"Jing-Ming Guo","doi":"10.1109/ICICS.2005.1689204","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689204","url":null,"abstract":"In this paper, the well known least-mean-square (LMS) method is applied for designing an adaptive filter used to produce a high quality halftone image. The experimental results show that the proposed LMS-designed halftoning achieves the extra benefit of edge enhancement and eliminates the annoying worm effect in error-diffused image. In addition, we provide two data hiding applications, named direct embedding LMS-designed halftone technique (DELDH) and information sharing LMS-designed halftone technique (ISLDH) to demonstrate the performance of the proposed LMS-designed halftoning. As the experimental results demonstrated, both techniques achieve excellent image quality and decoded visual patterns","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"13 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134132497","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689148
S. Easanuruk, S. Mitatha, S. Intajag, S. Chitwong
One of important tasks of radar image processing is reducing speckle noise as preprocessing to enhance performance of other processing such as segmentation, classification, etc. In this paper, we then apply the fuzzy morphology together with anisotropic diffusion to reduce speckled noise of SAR image. Anisotropic diffusion is designed based on additive noise model, but the form of speckled image is in multiplicative speckle model. To transform additive noise model into multiplicative speckle model, logarithmic transformation is then used. Our algorithm performs in log-domain. Finally, de-speckled image being in log-domain is converted into spatial domain by using exponential transformation. Simulated image as speckled image is performed with our algorithm to show and compare results with recent reports in term of both signal to noise ratio (SNR) and the equivalent number of looks (ENL). Also, real SAR image is performed to confirm results in term of ENL only. Results from our experiment are shown that de-speckled image can smooth out in homogeneous area and preserve edge in heterogeneous area. Both visual image and numerical results are used to show all results
{"title":"Speckle Reduction Using Fuzzy Morphological Anisotropic Diffusion","authors":"S. Easanuruk, S. Mitatha, S. Intajag, S. Chitwong","doi":"10.1109/ICICS.2005.1689148","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689148","url":null,"abstract":"One of important tasks of radar image processing is reducing speckle noise as preprocessing to enhance performance of other processing such as segmentation, classification, etc. In this paper, we then apply the fuzzy morphology together with anisotropic diffusion to reduce speckled noise of SAR image. Anisotropic diffusion is designed based on additive noise model, but the form of speckled image is in multiplicative speckle model. To transform additive noise model into multiplicative speckle model, logarithmic transformation is then used. Our algorithm performs in log-domain. Finally, de-speckled image being in log-domain is converted into spatial domain by using exponential transformation. Simulated image as speckled image is performed with our algorithm to show and compare results with recent reports in term of both signal to noise ratio (SNR) and the equivalent number of looks (ENL). Also, real SAR image is performed to confirm results in term of ENL only. Results from our experiment are shown that de-speckled image can smooth out in homogeneous area and preserve edge in heterogeneous area. Both visual image and numerical results are used to show all results","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133139145","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689261
P. Meher
A common computing-core representation of the discrete cosine transform and discrete sine transform is derived, and a reduced-complexity algorithm is developed for computation of the proposed common computing-core. A parallel architecture based on the principle of distributed arithmetic is designed further for computation of these transforms using the common-core algorithm. The proposed scheme not only leads to a systolic-like, fully-pipelined regular and modular hardware for computing the these transforms, but also offers significant saving of hardware over the existing structures having nearly the same computational throughput. The proposed structure is devoid of complicated input/output mapping and does not involve any complex control structure. Moreover, it does not have restriction on the transform-length, and can be utilized as a reusable core for cost-effective, high-throughput implementation of either of these transforms
{"title":"Unified DA-based Parallel Architecture for Computing the DCT and the DST","authors":"P. Meher","doi":"10.1109/ICICS.2005.1689261","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689261","url":null,"abstract":"A common computing-core representation of the discrete cosine transform and discrete sine transform is derived, and a reduced-complexity algorithm is developed for computation of the proposed common computing-core. A parallel architecture based on the principle of distributed arithmetic is designed further for computation of these transforms using the common-core algorithm. The proposed scheme not only leads to a systolic-like, fully-pipelined regular and modular hardware for computing the these transforms, but also offers significant saving of hardware over the existing structures having nearly the same computational throughput. The proposed structure is devoid of complicated input/output mapping and does not involve any complex control structure. Moreover, it does not have restriction on the transform-length, and can be utilized as a reusable core for cost-effective, high-throughput implementation of either of these transforms","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130288054","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689221
C. Jiang, I.T. Ong, Y.H. Lee
In this paper, the relationship between the rainfall rate statistics from the Doppler radar system and the one minute integration time rain distributions from a rain gauge network was studied. With these investigations, a simple framework of converting the radar rainfall rate statistics to its equivalent one minute rain rates was suggested. The prediction results were evaluated, and good agreement with the measured data was observed
{"title":"Relationship between Doppler Radar Data and Point Rainfall Rate","authors":"C. Jiang, I.T. Ong, Y.H. Lee","doi":"10.1109/ICICS.2005.1689221","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689221","url":null,"abstract":"In this paper, the relationship between the rainfall rate statistics from the Doppler radar system and the one minute integration time rain distributions from a rain gauge network was studied. With these investigations, a simple framework of converting the radar rainfall rate statistics to its equivalent one minute rain rates was suggested. The prediction results were evaluated, and good agreement with the measured data was observed","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122492047","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1688992
K. Yamamoto, A. Kusuda, S. Yoshida
We attempt to analytically formulate the spectral efficiency and outage probability of multihop cellular systems, in which mobile stations and base stations can communicate by using multihop relaying. This multihop relaying has the same ability as symbol rate control to enhance the end-to-end communication range at the loss of spectral efficiency. According to this commonality, a similar methodology to formulate the performance of rate-adaptive cellular systems is used. Numerical results reveal that multihop relaying is superior to symbol rate control in terms of both coverage and spectral efficiency
{"title":"Performance Evaluation of Multihop Cellular Systems and Rate Adaptive Cellular Systems","authors":"K. Yamamoto, A. Kusuda, S. Yoshida","doi":"10.1109/ICICS.2005.1688992","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1688992","url":null,"abstract":"We attempt to analytically formulate the spectral efficiency and outage probability of multihop cellular systems, in which mobile stations and base stations can communicate by using multihop relaying. This multihop relaying has the same ability as symbol rate control to enhance the end-to-end communication range at the loss of spectral efficiency. According to this commonality, a similar methodology to formulate the performance of rate-adaptive cellular systems is used. Numerical results reveal that multihop relaying is superior to symbol rate control in terms of both coverage and spectral efficiency","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124017081","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689219
M. Yang, G. Leedham, C. Higgins, S. M. Htwe
Pitman shorthand has been shown to possess unique advantages as a means of fast text entry on hand-held devices. Based on previous academic achievements, this paper discusses critical issues in the commercialization of Pitman shorthand online reorganization system from the technological perspective. In this paper, critical technological issues are classified into two aspects. These critical issues are illustrated by an entire online simulating system which realizes all core functions from input, through segmentation, recognition to transcription of Pitman shorthand
{"title":"Critical Technological Issues of Commercializing a Pitman Shorthand Recognition System","authors":"M. Yang, G. Leedham, C. Higgins, S. M. Htwe","doi":"10.1109/ICICS.2005.1689219","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689219","url":null,"abstract":"Pitman shorthand has been shown to possess unique advantages as a means of fast text entry on hand-held devices. Based on previous academic achievements, this paper discusses critical issues in the commercialization of Pitman shorthand online reorganization system from the technological perspective. In this paper, critical technological issues are classified into two aspects. These critical issues are illustrated by an entire online simulating system which realizes all core functions from input, through segmentation, recognition to transcription of Pitman shorthand","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121249465","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689285
S. Sappok, S. Joeres, S. Heinen
A novel calibration scheme for predistortion SigmaDelta PLLs is proposed in this paper. In contrast to present calibration algorithms this technique detects the integral phase variation of the loops step response. The architecture uses minimum chip area by synchronously sampling the data content of an delay locked loop. Using this technique to detect the phase difference during a step response allows to determine the real loop gain within 7 mus with an accuracy better than 0.1%. Obtaining this, the deviation from the desired loop gain can be adjusted by a digitally controlled charge pump in order to derive the wanted loop transfer function. This is mandatory for predistortion modulation loops
{"title":"Step Response Detection Technique for Self-Calibrating Predistortion GFSK ΣΔ Modulation Loops","authors":"S. Sappok, S. Joeres, S. Heinen","doi":"10.1109/ICICS.2005.1689285","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689285","url":null,"abstract":"A novel calibration scheme for predistortion SigmaDelta PLLs is proposed in this paper. In contrast to present calibration algorithms this technique detects the integral phase variation of the loops step response. The architecture uses minimum chip area by synchronously sampling the data content of an delay locked loop. Using this technique to detect the phase difference during a step response allows to determine the real loop gain within 7 mus with an accuracy better than 0.1%. Obtaining this, the deviation from the desired loop gain can be adjusted by a digitally controlled charge pump in order to derive the wanted loop transfer function. This is mandatory for predistortion modulation loops","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129217212","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689089
I. Ngamroo, W. Kongprawechnon
When large load disturbances occur in a power system, a system frequency may be heavily perturbed and oscillatory. To stabilize frequency oscillations, the active power controlled by superconducting magnetic energy storage (SMES) can be applied. In this paper, a new robust design of a frequency stabilizer equipped with SMES is presented. The frequency stabilizer is based on a second-order lead/lag compensator. To enhance the robust stability of the controlled system against uncertainties such as system parameters variations, various load changes etc., the multiplicative uncertainty is included in system modeling. As a result, the robust stability can be easily guaranteed in terms of the multiplicative stability margin (MSM). Control parameters of the frequency stabilizer are tuned by a tabu search, so that the desired damping ratio of the target inter-area mode and the best MSM are obtained. Simulation studies confirm the high robustness of the frequency stabilizer against system uncertainties
{"title":"Design of Robust Frequency Stabilizers of Superconducting Magnetic Energy Storages","authors":"I. Ngamroo, W. Kongprawechnon","doi":"10.1109/ICICS.2005.1689089","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689089","url":null,"abstract":"When large load disturbances occur in a power system, a system frequency may be heavily perturbed and oscillatory. To stabilize frequency oscillations, the active power controlled by superconducting magnetic energy storage (SMES) can be applied. In this paper, a new robust design of a frequency stabilizer equipped with SMES is presented. The frequency stabilizer is based on a second-order lead/lag compensator. To enhance the robust stability of the controlled system against uncertainties such as system parameters variations, various load changes etc., the multiplicative uncertainty is included in system modeling. As a result, the robust stability can be easily guaranteed in terms of the multiplicative stability margin (MSM). Control parameters of the frequency stabilizer are tuned by a tabu search, so that the desired damping ratio of the target inter-area mode and the best MSM are obtained. Simulation studies confirm the high robustness of the frequency stabilizer against system uncertainties","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117245623","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 : 2005-12-06DOI: 10.1109/ICICS.2005.1689143
Ji-Soo Keum, Hyon-Soo Lee
In this paper, we propose a new speaker change detection algorithm based on spectral peak track analysis. When we pronounce the Korean sentence or words, it has a rhythm and intonation pattern varies according to the kinds of sentence and speaking style. Spectral peak track has relevance to this information and audio data type. Therefore, we use spectral peak track information as a speaker feature for change detection. The proposed method consists of three parts: data segmentation, feature generation based on spectral peak tracks analysis and change detection. We assume that the changing point exists at the breathing point, because these locations rely on sentence duration, speaking speed and style, and grammar. To evaluate the proposed method, we calculated the precision (PRC) and recall (RCL) for Korean broadcast news and compared these results with the BIC method for randomly selected segments. Experiment result, the PRC is 73.14% and the RCL is 85.46% for Korean broadcast news, and we have achieved a performance comparable to BIC
{"title":"Speaker Change Detection Based on Spectral Peak Track Analysis for Korean Broadcast News","authors":"Ji-Soo Keum, Hyon-Soo Lee","doi":"10.1109/ICICS.2005.1689143","DOIUrl":"https://doi.org/10.1109/ICICS.2005.1689143","url":null,"abstract":"In this paper, we propose a new speaker change detection algorithm based on spectral peak track analysis. When we pronounce the Korean sentence or words, it has a rhythm and intonation pattern varies according to the kinds of sentence and speaking style. Spectral peak track has relevance to this information and audio data type. Therefore, we use spectral peak track information as a speaker feature for change detection. The proposed method consists of three parts: data segmentation, feature generation based on spectral peak tracks analysis and change detection. We assume that the changing point exists at the breathing point, because these locations rely on sentence duration, speaking speed and style, and grammar. To evaluate the proposed method, we calculated the precision (PRC) and recall (RCL) for Korean broadcast news and compared these results with the BIC method for randomly selected segments. Experiment result, the PRC is 73.14% and the RCL is 85.46% for Korean broadcast news, and we have achieved a performance comparable to BIC","PeriodicalId":425178,"journal":{"name":"2005 5th International Conference on Information Communications & Signal Processing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115472987","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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