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2005 International Symposium on Intelligent Signal Processing and Communication Systems最新文献

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A novel method of predicting gamma-turns using SVM and multiple alignment profiles 一种基于支持向量机和多对准轮廓的新方法
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595445
Qiang Li, Yanda Li
{"title":"A novel method of predicting gamma-turns using SVM and multiple alignment profiles","authors":"Qiang Li, Yanda Li","doi":"10.1109/ISPACS.2005.1595445","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595445","url":null,"abstract":"From both the structural and functional point of view, tight turns play an important role as well as /spl alpha/-helix and /spl beta/-sheet, /spl gamma/-turn, the second most characterized and commonly found tight turn after the /spl beta/-turn, is defined as a three-residue turn. Recently, Kaur and Raghava developed a neural network method to predict /spl gamma/-turns and achieved perfect results. In this paper, we employ a SVM method using both evolutionary information and secondary structure information to predict /spl gamma/-turns. Compared to the neural network method, our method improves several performance measures, such as prediction accuracy, and MCC. Also we use a new performance measure, SOV, to assess our method.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"610 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122364127","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}
引用次数: 0
A way of reconstructing the continuous-time dynamical model of PBNs PBNs连续时间动力学模型的一种重建方法
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595448
Zhibin Hu, Xiaobo Zhou, Xiao-jiang Yan
{"title":"A way of reconstructing the continuous-time dynamical model of PBNs","authors":"Zhibin Hu, Xiaobo Zhou, Xiao-jiang Yan","doi":"10.1109/ISPACS.2005.1595448","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595448","url":null,"abstract":"Based on the hypothesis that the number of state renewals of PBNs in (0,t] is a Poisson process, A way is proposed to reconstruct the continuous-time homogeneous Markov process dynamical model of PBNs from a homogeneous Markov chain dynamical model of PBNs. The matrix of transition probabilities of the reconstructed Markov processes is given. It is concluded that the reconstructed Markov process is a regular process and from the conclusion a few results of long-run behavior of the reconstructed Markov process are derived. These results demonstrate the reconstructed Markov processes dynamical model of PBNs is reasonable.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128487252","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}
引用次数: 0
A novel timing estimation method and delay spread estimation using subblock correlation for OFDM systems 提出了一种基于子块相关的OFDM系统时延估计方法
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595386
Gwo-Ruey Lee, Jin-Tong Chang, J. Wen
{"title":"A novel timing estimation method and delay spread estimation using subblock correlation for OFDM systems","authors":"Gwo-Ruey Lee, Jin-Tong Chang, J. Wen","doi":"10.1109/ISPACS.2005.1595386","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595386","url":null,"abstract":"In this paper, a new method for timing estimation and delay spread estimation using subblock correlation in OFDM systems is proposed. We use the subblock correlation between the cyclic prefix and copied data to estimate symbol timing. The subblock correlations also give information about the delay spread. When the channel variation is slow, we can periodically reset the length of the cyclic prefix, which is just long enough to cover intersymbol interference (ISI). The efficiency of these techniques is demonstrated by the simulation results.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116968207","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}
引用次数: 0
A finger-tracking virtual mouse realized in an embedded system 一种在嵌入式系统中实现的手指跟踪虚拟鼠标
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ispacs.2005.1595526
W. Tsang, K. Pun
{"title":"A finger-tracking virtual mouse realized in an embedded system","authors":"W. Tsang, K. Pun","doi":"10.1109/ispacs.2005.1595526","DOIUrl":"https://doi.org/10.1109/ispacs.2005.1595526","url":null,"abstract":"In this paper, a virtual mouse that is based on tracking the movement of a finger is presented. The idea is for users to control their computer or TV system simply by moving their fingers, without any contact on realistic objects. A fast and robust method that can trace the position of finger tip is proposed. The method consists of four steps. First, the skin-color pixels of figures are detected by color segmentation using the chrominance component of the input from a CMOS image sensor. Second, density regularization processes are carried out to reinforce the regions of skin-colour pixels. Third, an effective window search technique is applied for minimizing computational cost. Fourth, a finger-tip tracking algorithm is applied to find out the finger-tip position. Clicking action is also implemented by a specific movement. The virtual mouse has been designed in an embedded Linux system. The device works successfully, the response is quick and accurate positioning is obtained.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125964337","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}
引用次数: 1
LDPC codes performance based on OFDM wireless communication system 基于OFDM无线通信系统的LDPC码性能研究
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595409
Yoshiki Kami, Calvin Han, Yoshikazu Miyanagat
{"title":"LDPC codes performance based on OFDM wireless communication system","authors":"Yoshiki Kami, Calvin Han, Yoshikazu Miyanagat","doi":"10.1109/ISPACS.2005.1595409","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595409","url":null,"abstract":"In this paper, we present LDPC-coded OFDM system for wireless communication. LDPC code has superior performance in error correcting and can be adopted in various communication systems. We evaluate BER performance for wireless communication system based on IEEE802.11a standard. We demonstrate that LDPC coded system has better performance with smaller number of iterations than conventional Viterbi decoding. Furthermore it shows better performance by using large number of data symbols per packet. We present LDPC coded scheme, which is suitable for packet OFDM system, and show simulation results in multipath fading environment.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133890602","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}
引用次数: 2
Wavelet-based medical image compression with adaptive prediction 基于小波自适应预测的医学图像压缩
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595537
Yao-Tien Chen, Din-Chang Tseng, Pao-Chi Chang
{"title":"Wavelet-based medical image compression with adaptive prediction","authors":"Yao-Tien Chen, Din-Chang Tseng, Pao-Chi Chang","doi":"10.1109/ISPACS.2005.1595537","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595537","url":null,"abstract":"A lossless wavelet-based image compression method with adaptive prediction is proposed. Firstly, we analyze the correlations between wavelet coefficients to identify a proper wavelet basis function, then predictor variables are statistically test to determine which wavelet coefficients should be included in the prediction model. At last, prediction differences are encoded by adaptive arithmetic coding to achieve a higher-rate compression. Instead of relying on a fixed number of predictors on fixed locations in the traditional approaches, we proposed the adaptive prediction approach to overcome the multicollinearity problem. The proposed innovative approach integrating correlation analysis for selecting wavelet basis function with predictor variable selection is fully achieving high accuracy of prediction. Experimental results show that the proposed approach indeed achieves a higher compression rate on CT and MRI images comparing with several state-of-the-art methods.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128035460","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}
引用次数: 2
On the subband orthogonality of cosine-modulated filter banks 余弦调制滤波器组的子带正交性
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595501
L. A. Lee, W. Gan
{"title":"On the subband orthogonality of cosine-modulated filter banks","authors":"L. A. Lee, W. Gan","doi":"10.1109/ISPACS.2005.1595501","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595501","url":null,"abstract":"The second-order characteristics of cosine-modulated filter banks are formulated and analyzed. We show that the outputs of a cosine-modulated filter bank are always properly phase-aligned in such a way that they are orthogonal at zero lag for arbitrary types of input signal. These subband-orthogonality properties are desirable in improving the efficiency and effectiveness of signal processing algorithms.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124328420","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}
引用次数: 5
Improved H.264 rate-control using channel throughput estimate for ARQ-based wireless video transmissions 改进了基于arq的无线视频传输的H.264速率控制
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595334
N. Srisawaivilai, S. Aramvith
{"title":"Improved H.264 rate-control using channel throughput estimate for ARQ-based wireless video transmissions","authors":"N. Srisawaivilai, S. Aramvith","doi":"10.1109/ISPACS.2005.1595334","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595334","url":null,"abstract":"In this paper, we investigate the scenario of wireless H.264 video transmission where selective-repeat ARQ has been adopted as an error control technique. While using ARQ can ensure reliable transmission, consecutive retransmissions cause the degraded PSNR and a lot of frames skipped. We then propose an improved rate-control by monitoring buffer occupancy at both frame and basic unit layers and integrating channel throughput estimate at the frame layer. Simulation results indicate our propose scheme can improve PSNR of up to 0.8 dB and reduce the number of frames skipped around 30%, compared to that of H.264.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116769723","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}
引用次数: 1
Modeling human motion for indoor radio channel at 10 GHz 模拟人体运动的室内无线电频道在10 GHz
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595514
Yongming Huang, Larbi Talbi, T. Denidni, A. Charbonneau, M. Otmani
{"title":"Modeling human motion for indoor radio channel at 10 GHz","authors":"Yongming Huang, Larbi Talbi, T. Denidni, A. Charbonneau, M. Otmani","doi":"10.1109/ISPACS.2005.1595514","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595514","url":null,"abstract":"Human body effects can considerably influence the channel characteristics of indoor radio communication systems. In this paper, the human body is approximated with a metallic circular cylinder to deal with a corridor scenario in a deterministic model, which is based on ray tracing technique. The simulation results show a good agreement with continuous wave (CW) experimental measurements conducted at 10 GHz. The nature of propagation is investigated regarding the interaction between the cylinder motion and the walls with the difference of the operating frequency, the size of the cylinder and the distance between a wall and the cylinder.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114527892","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}
引用次数: 0
Truncated exponential nonlinearities for independent component analysis 独立分量分析的截断指数非线性
2005 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 1900-01-01 DOI: 10.1109/ISPACS.2005.1595426
M. Tufail, M. Abe, M. Kawamata
{"title":"Truncated exponential nonlinearities for independent component analysis","authors":"M. Tufail, M. Abe, M. Kawamata","doi":"10.1109/ISPACS.2005.1595426","DOIUrl":"https://doi.org/10.1109/ISPACS.2005.1595426","url":null,"abstract":"This paper proposes exponential type nonlinearities in order to blindly separate instantaneous mixtures of signals with mixed kurtosis signs. These nonlinear functions are applied only in a certain range around zero in order to ensure that the relative gradient algorithm remains locally stable. The proposed truncated nonlinearities neutralize the effect of outliers while the higher order terms inherently present in the exponential function result in fast convergence especially for signals with bounded support. By varying the truncation threshold, signals with both sub-Gaussian and super-Gaussian probability distributions can be separated. Furthermore, when the sources consist of signals with mixed kurtosis signs we propose to estimate the characteristic function online in order to classify the signals as sub-Gaussian or super-Gaussian and consequently choose an adequate value of the truncation threshold. Some computer simulations are presented to demonstrate the effectiveness of the proposed idea.","PeriodicalId":385759,"journal":{"name":"2005 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114819149","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}
引用次数: 0
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