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2011 17th International Conference on Digital Signal Processing (DSP)最新文献

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Efficient burst error correction method for application in low frequency channels and data storage units 一种应用于低频信道和数据存储单元的高效突发纠错方法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004970
N. Bardis, O. Markovskyi, N. Doukas
{"title":"Efficient burst error correction method for application in low frequency channels and data storage units","authors":"N. Bardis, O. Markovskyi, N. Doukas","doi":"10.1109/ICDSP.2011.6004970","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004970","url":null,"abstract":"This paper investigates a simple and effective method for the correction of errors that occur in bursts during data transmission in low - frequency channels but also during data storage in magnetic and optical disks. The specific technique is based on the binary weighted checksum which is computed with logical operations. It is shown that the solution proposed not only guarantees the correction of any single error burst but it also lowers the computational complexity reducing the required redundancy and making use of simple procedures and rules out erroneous correction. Finally, the use of the algorithm is illustrated via the thorough presentation of an example of erroneous data transmission.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124988594","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: 11
Human tracking in crowded environment with stereo cameras 立体摄像机在拥挤环境下的人体跟踪
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004902
T. K. Cheung, K. T. Woo
{"title":"Human tracking in crowded environment with stereo cameras","authors":"T. K. Cheung, K. T. Woo","doi":"10.1109/ICDSP.2011.6004902","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004902","url":null,"abstract":"In this paper, a human detection and tracking system in a crowded environment is presented. The biggest challenge of the system is to detect occluded people from the captured video where visible information of the occluded people in a camera is reduced. Many researchers proposed to reconstruct the occluded information from other cameras which are installed in the same place with different viewing angles, but, hardware cost and computation cost will be increased. In this paper, a stereo camera system is used with a novel occlusion model to solve the occlusion problem. Result shows that it significantly reduces the hardware cost and computation cost of the system while maintaining a good tracking result under severe occlusions.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128576397","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: 4
Bistatic SAR simulation: Time and frequency domain approaches 双基地SAR模拟:时域和频域方法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6005021
G. Franceschetti, A. Iodice, A. Natale, D. Riccio
{"title":"Bistatic SAR simulation: Time and frequency domain approaches","authors":"G. Franceschetti, A. Iodice, A. Natale, D. Riccio","doi":"10.1109/ICDSP.2011.6005021","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6005021","url":null,"abstract":"A time domain simulator useful to obtain the pulse response for the generic bistatic SAR configuration is here presented. Moreover, we focus on two particular bistatic systems, i.e. the twin SAR and the space-surface SAR, for which we obtain, under some analytical approximations, the Transfer Functions. Finally, to investigate the possibility to perform an efficient processing in the frequency domain for these two systems, we perform a numerical comparison between the point spread functions, obtained using the time domain simulator and the inverse FFT of the Transfer Functions.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124709382","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
Multiple LDPC decoder of very low bit-error rate 低误码率的多LDPC解码器
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004951
I. Tsatsaragkos, N. Kanistras, Vassilis Paliouras
{"title":"Multiple LDPC decoder of very low bit-error rate","authors":"I. Tsatsaragkos, N. Kanistras, Vassilis Paliouras","doi":"10.1109/ICDSP.2011.6004951","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004951","url":null,"abstract":"The error correcting capability of LDPC based systems at low noise levels is often dominated by the so-called error floor, a region in the BER vs. noise level plot, where BER reduction slows down as the noise level decreases. The error floor behavior is commonly attributed to the sub-optimality of iterative decoding algorithms on graphs with cycles, which become trapped to local minimum solutions. Trapping of the decoder depends on several factors, including the decoding algorithm. A particular received word that is not decoded by a certain algorithm may be decoded successfully by a different algorithm. The proposed Multiple Decoder exploits this diverse behavior, by decoding a particular received word with N different algorithms, composing an LDPC decoder that achieves very low BER in the error floor region of operation, less iterations and higher throughput than the equivalent single decoder system.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122152108","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: 8
An efficient blind timing skews estimation for time-interleaved analog-to-digital converters 一种有效的时间交错模数转换器的盲时偏估计方法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004877
Yuexian Zou, Bo Li, X. Chen
{"title":"An efficient blind timing skews estimation for time-interleaved analog-to-digital converters","authors":"Yuexian Zou, Bo Li, X. Chen","doi":"10.1109/ICDSP.2011.6004877","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004877","url":null,"abstract":"In this paper, we propose an efficient blind timing skews estimation (TSE) method for TIADC systems by evaluating the autocorrelation of the analog input signal and the mean squared difference between the output samples of the two adjacent sub-ADCs. By approximating the input signal autocorrelation function using the second order Maclaurin series, an analytical solution of the blind TSE using noise free sub-ADC output model and additive white Gaussian noise model is derived. Experimental results show that the proposed blind TSE method has low computational complexity, good estimation accuracy and robustness to additive Gaussian noise for the analog signals with input frequency lower than half of the Nyquist frequency. The experiment results with the real TIADC output data further validate its good performance.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122306077","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: 7
Correspondence normal difference: An aligned representation of 3D faces to apply discriminant analysis methods 对应正态差:三维人脸的对齐表示，以应用判别分析方法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004975
H. Mohammadzade, D. Hatzinakos
{"title":"Correspondence normal difference: An aligned representation of 3D faces to apply discriminant analysis methods","authors":"H. Mohammadzade, D. Hatzinakos","doi":"10.1109/ICDSP.2011.6004975","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004975","url":null,"abstract":"Since the geometry of the face changes drastically under expression variation, it is one of the greatest challenges in 3D face recognition to design systems that are robust to this variability. In this paper, we introduce a new representation of 3D faces in which all facial features are aligned over different faces. This representation contains highly discriminative features and is particularly useful for the employment of discriminant analysis methods for 3D face recognition. To the best of our knowledge, because of the lack of such alignment, so far, discriminant analysis methods have not been directly applied to 3D faces. Instead, the common approach is to register a probe face to each of the gallery faces, and then calculate the sum of the distances between their points for recognition. This registration also demands extensive computational effort. We demonstrate that the capability of a discriminant method, such as the LDA, to discriminate between the geometric variations resulted from expression changes and the geometric variations resulted from subject difference is beyond the capability of the state-of-art 3D face recognition methods. We achieved a verification rate of 99.5 percent at a false acceptance rate of 0.1 percent on the FRGC v2 database which is, to the best our knowledge, the best performance reported for this database in the literature.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"315 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115832519","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
Multimodal human detection by sparse feature pursuit 稀疏特征追踪的多模态人体检测
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004917
J. Han, O. Loffeld, K. Hartmann
{"title":"Multimodal human detection by sparse feature pursuit","authors":"J. Han, O. Loffeld, K. Hartmann","doi":"10.1109/ICDSP.2011.6004917","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004917","url":null,"abstract":"Human detection from multimodal image is a challenging task of information extraction and plays a striking important role for the later steps such as classification, recognition, tracking, and so forth. This paper describes an innovative sparse feature-based approach for human detection using the multimodal image. Firstly we consider a human as sparse feature which moves with multimodal image sequences. And afterwards the problem of moving human estimation can be formulated as decomposition of a matrix into a sparse human matrix and a low-rank background matrix. Furthermore, both of the components are exactly recovered by solving convex optimization problem. Finally the sparse feature that contains human is reconstructed to generate the human map. Experimental results on the real multimodal image from a novel 2D/3D vision system verify the effectiveness of our proposed method. Meanwhile the results yield the potential application of matrix decomposition for various multimodal data analysis.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131626871","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
Vector quantizationwith renormalized splits for wideband speech 宽带语音重归一化分割的矢量量化
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004911
M. A. Ramírez
{"title":"Vector quantizationwith renormalized splits for wideband speech","authors":"M. A. Ramírez","doi":"10.1109/ICDSP.2011.6004911","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004911","url":null,"abstract":"A method is proposed for split vector quantization (SVQ) that, while keeping up with the lower search complexity inherent to SVQ, reduces the attendant split loss. It operates partially in the training and encoding phases by normalizing the bandwidth covered by each split. The action is completed in the decoding phase by renormalizing the bandwidth spanned by each split of the codebook to that allowed by a nonoverlapping constraint with neighboring split bands. Therefore, the method is referred to as renormalized SPV (RSVQ). The performance of RSVQ is investigated in comparison to standard SVQ for coding line spectral frequency (LSF) vectors that parameterize the spectral envelope of wideband speech and it is found to save four bits, reaching transparent coding at 42 bit/frame.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131942677","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
The memristor as an electric synapse - synchronization phenomena 记忆电阻器作为一种电突触同步现象
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004873
C. Volos, I. Kyprianidis, I. Stouboulos
{"title":"The memristor as an electric synapse - synchronization phenomena","authors":"C. Volos, I. Kyprianidis, I. Stouboulos","doi":"10.1109/ICDSP.2011.6004873","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004873","url":null,"abstract":"Today many scientists see nonlinear science as the most important frontier for the fundamental understanding of Nature. Especially, the recent implementation of the memristor has led to the interpretation of phenomena not only in electronic devices but also in biological systems. Many research teams work on projects, which use memristor to simulate the behavior of biological synapses. Based on this research approach, we have studied using computer simulations, the dynamic behavior of two coupled, via a memristor, identical nonlinear circuits, which play the role of “neurons”. The proposed memristor is a flux-controlled memristor where the relation between charge and magnetic flux is a smooth continuous cubic function. Very interesting synchronization phenomena such as inverse π-lag synchronization and complete chaotic synchronization were observed.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"16 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131663008","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: 18
Long-term energy constraints and power control in cognitive radio networks 认知无线电网络的长期能量约束与功率控制
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6005008
F. Mériaux, Y. Hayel, S. Lasaulce, A. Garnaev
{"title":"Long-term energy constraints and power control in cognitive radio networks","authors":"F. Mériaux, Y. Hayel, S. Lasaulce, A. Garnaev","doi":"10.1109/ICDSP.2011.6005008","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6005008","url":null,"abstract":"When a long-term energy constraint is imposed to a transmitter, the average energy-efficiency of a transmitter is, in general, not maximized by always transmitting. In a cognitive radio context, this means that a secondary link can re-exploit the non-used time-slots. In the case where the secondary link is imposed to generate no interference on the primary link, a relevant issue is therefore to know the fraction of time-slots available to the secondary transmitter, depending on the system parameters. On the other hand, if the secondary transmitter is modeled as a selfish and free player choosing its power control policy to maximize its average energy-efficiency, resulting primary and secondary signals are not necessarily orthogonal and studying the corresponding Stackelberg game is relevant to know the outcome of this interactive situation in terms of power control policies.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131757954","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: 6
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