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2015 23rd European Signal Processing Conference (EUSIPCO)最新文献

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Robust algorithm for active feedback control of narrowband noise 窄带噪声主动反馈控制的鲁棒算法
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362388
M. Niedźwiecki, M. Meller, Maciej Gajdzica
{"title":"Robust algorithm for active feedback control of narrowband noise","authors":"M. Niedźwiecki, M. Meller, Maciej Gajdzica","doi":"10.1109/EUSIPCO.2015.7362388","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362388","url":null,"abstract":"The problem of active control of narrowband acoustic noise is considered. It is shown that the proposed earlier feedback control algorithm called SONIC (self-optimizing narrowband interference canceller), based on minimization of the L2-norm performance measure, can be re-derived using the Li approach. The resulting robust SONIC algorithm is more robust to heavy-tailed measurement noise, such as the a-stable noise, than the original SONIC.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124255608","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
Hybrid input spaces for exemplar-based noise robust speech recognition using coupled dictionaries 基于样本的噪声鲁棒语音识别的混合输入空间耦合字典
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362669
Deepak Baby, H. V. hamme
{"title":"Hybrid input spaces for exemplar-based noise robust speech recognition using coupled dictionaries","authors":"Deepak Baby, H. V. hamme","doi":"10.1109/EUSIPCO.2015.7362669","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362669","url":null,"abstract":"Exemplar-based feature enhancement successfully exploits a wide temporal signal context. We extend this technique with hybrid input spaces that are chosen for a more effective separation of speech from background noise. This work investigates the use of two different hybrid input spaces which are formed by incorporating the full-resolution and modulation envelope spectral representations with the Mel features. A coupled output dictionary containing Mel exemplars, which are jointly extracted with the hybrid space exemplars, is used to reconstruct the enhanced Mel features for the ASR back-end. When compared to the system which uses Mel features only as input exemplars, these hybrid input spaces are found to yield improved word error rates on the AURORA-2 database especially with unseen noise cases.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797192","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
Performance analysis of MVDR beamformer in WASN with sampling rate offsets and blind synchronization 采样率偏移和盲同步的无线局域网MVDR波束形成器性能分析
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362382
Dani Cherkassky, S. M. Golan, S. Gannot
{"title":"Performance analysis of MVDR beamformer in WASN with sampling rate offsets and blind synchronization","authors":"Dani Cherkassky, S. M. Golan, S. Gannot","doi":"10.1109/EUSIPCO.2015.7362382","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362382","url":null,"abstract":"In wireless acoustic sensor networks (WASNs), sampling rate offsets (SROs) between nodes are inevitable, and recognized as one of the challenges that have to be resolved for a coherent array processing. A simplified free-space propagation is considered with a single desired source impinging a WASNs from the far-field and contaminated by a diffuse noise. In this paper, we analyze the theoretical performance of a fixed superdirective beamformer (SDBF) in presence of SROs. The SDBF performance loss due to SROs is manifested as a distortion of the nominal beampattern and an excess noise power at the output of the beamformer. We also propose an iterative algorithm for SROs estimation. The theoretical results are validated by simulation.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117196487","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
Generalized Ricci curvature based sampling and reconstruction of images 基于广义Ricci曲率的图像采样与重构
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362454
Shu Lin, Zhongxuan Luo, Jielin Zhang, Emil Saucan
{"title":"Generalized Ricci curvature based sampling and reconstruction of images","authors":"Shu Lin, Zhongxuan Luo, Jielin Zhang, Emil Saucan","doi":"10.1109/EUSIPCO.2015.7362454","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362454","url":null,"abstract":"We introduce a novel method of image sampling based on viewing grayscale images as manifolds with density, and sampling them according to the generalized Ricci curvature introduced by Bakry, Emery and Ledoux. A variation of this approach, due to Morgan and his students is also considered. This new paradigm generalizes ideas and results that are by now common in Imaging and Graphics. We apply the new algorithm to natural and range images, as well as cartoons and show that the proposed method produces results similar to those obtained by employing more standard approaches. Furthermore, we show that our approach extends naturally to other types of images, in particular to MRI and CT, where its potential applications are maximal, as well as to meshes.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117230370","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
Enforcing consistency in spectral masks using Markov random fields 使用马尔可夫随机场加强光谱掩模的一致性
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362740
Michael I. Mandel, N. Roman
{"title":"Enforcing consistency in spectral masks using Markov random fields","authors":"Michael I. Mandel, N. Roman","doi":"10.1109/EUSIPCO.2015.7362740","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362740","url":null,"abstract":"Localization-based multichannel source separation algorithms typically operate by clustering or classifying individual time-frequency points based on their spatial characteristics, treating adjacent points as independent observations. The Model-based EM Source Separation and Localization (MESSL) algorithm is one such approach for binaural signals that achieves additional robustness by enforcing consistency in inaural parameters across frequency. This paper incorporates MESSL into a Markov Random Field (MRF) framework in order to addition ally enforce consistency in the assignment of neighboring time-frequency units to sources. Approximate inference in the MRF is performed using loopy belief propagation (LBP), and the same approach can be used to smooth any probabilistic source separation mask. The proposed MESSL-MRF algorithm is tested on binaural mixtures of three sources in reverberant conditions and shows significant improvements over the original MESSL algorithm as measured by both signal-to-distortion ratios as well as a speech intelligibility predictor.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127065125","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
New robust LASSO method based on ranks 基于秩的鲁棒LASSO方法
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362473
Hyon-Jung Kim, E. Ollila, V. Koivunen
{"title":"New robust LASSO method based on ranks","authors":"Hyon-Jung Kim, E. Ollila, V. Koivunen","doi":"10.1109/EUSIPCO.2015.7362473","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362473","url":null,"abstract":"The LASSO (Least Absolute Shrinkage and Selection Operator) has been a popular technique for simultaneous linear regression estimation and variable selection. Robust approaches for LASSO are needed in the case of heavy-tailed errors or severe outliers. We propose a novel robust LASSO method that has a non-parametric flavor: it solves a criterion function based on ranks of the residuals with LASSO penalty. The criterion is based on pairwise differences of residuals in the least absolute deviation (LAD) loss leading to a bounded influence function. With the i-criterion we can easily incorporate other penalties such as fused LASSO for group sparsity and smoothness. For both methods, we propose efficient algorithms for computing the solutions. Our simulation study and application examples (image denoising, prostate cancer data analysis) show that our method outperform the usual LS/LASSO methods for either heavy-tailed errors or outliers, offering better variable selection than another robust competitor, LAD-LASSO method.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127120968","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
Room impulse response estimation using perfect sequences for Legendre nonlinear filters 房间脉冲响应估计使用完美序列的勒让德非线性滤波器
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362843
A. Carini, S. Cecchi, L. Romoli
{"title":"Room impulse response estimation using perfect sequences for Legendre nonlinear filters","authors":"A. Carini, S. Cecchi, L. Romoli","doi":"10.1109/EUSIPCO.2015.7362843","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362843","url":null,"abstract":"The paper proposes a novel method for room impulse response estimation that is robust towards nonlinearities affecting the power amplifier or the loudspeaker of the measurement system. The method is based on measurements of the first order kernel of the Legendre nonlinear filter modeling the acoustic path. In the proposed approach, the first order kernel is efficiently estimated with the cross-correlation method using perfect periodic sequences for Legendre filters. Perfect sequences with period suitable for room impulse response identification are also developed within the paper. Simulation results in a realistic scenario illustrate the effectiveness and robustness towards nonlinearities of the proposed approach.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"27 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126072834","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
Virtual unrolling using X-ray computed tomography 使用x射线计算机断层扫描进行虚拟展开
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362908
D. Allegra, E. Ciliberto, P. Ciliberto, F. L. M. Milotta, G. Petrillo, F. Stanco, C. Trombato
{"title":"Virtual unrolling using X-ray computed tomography","authors":"D. Allegra, E. Ciliberto, P. Ciliberto, F. L. M. Milotta, G. Petrillo, F. Stanco, C. Trombato","doi":"10.1109/EUSIPCO.2015.7362908","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362908","url":null,"abstract":"In recent years the virtual restoration of ancient papyri has become an important research challenge. This is because the papyrus degradation is often very serious, so physical analysis could damage the artifact. In this paper we address the problem of virtual unrolling to read papyrus scroll by avoiding a dangerous physical unrolling. To this aim we propose a virtual restoration method based on software manipulation of X-ray tomographic images. To test the proposed approach, a realistic papyrus model has been made using the ancient method and pigments compatible with the Egyptian use. The stack of 259 slices, obtained through X-Ray Tomography device, has been processed in order to obtain a digital unrolled papyrus that is quite similar to the hypothetical unrolled sheet.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123300571","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: 14
A fast algorithm for joint eigenvalue decomposition of real matrices 实数矩阵联合特征值分解的快速算法
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362597
Rémi André, Tual Trainini, Xavier Luciani, E. Moreau
{"title":"A fast algorithm for joint eigenvalue decomposition of real matrices","authors":"Rémi André, Tual Trainini, Xavier Luciani, E. Moreau","doi":"10.1109/EUSIPCO.2015.7362597","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362597","url":null,"abstract":"We introduce an original algorithm to perform the joint eigen value decomposition of a set of real matrices. The proposed algorithm is iterative but does not resort to any sweeping procedure such as classical Jacobi approaches. Instead we use a first order approximation of the inverse of the matrix of eigen vectors and at each iteration the whole matrix of eigenvectors is updated. This algorithm is called Joint eigenvalue Decomposition using Taylor Expansion and has been designed in order to decrease the overall numerical complexity of the procedure (which is a trade off between the number of iterations and the cost of each iteration) while keeping the same level of performances. Numerical comparisons with reference algorithms show that this goal is achieved.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125511955","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
Spectrum awareness techniques for 5G satellite communications 5G卫星通信的频谱感知技术
2015 23rd European Signal Processing Conference (EUSIPCO) Pub Date : 2015-12-28 DOI: 10.1109/EUSIPCO.2015.7362887
A. Guidotti, D. Tarchi, V. Icolari, A. Vanelli-Coralli, G. Corazza
{"title":"Spectrum awareness techniques for 5G satellite communications","authors":"A. Guidotti, D. Tarchi, V. Icolari, A. Vanelli-Coralli, G. Corazza","doi":"10.1109/EUSIPCO.2015.7362887","DOIUrl":"https://doi.org/10.1109/EUSIPCO.2015.7362887","url":null,"abstract":"5G communications will enable new paradigms architectures and services, and the integration of satellite and terrestrial networks can play a key role. Cognitive radios are seen as the most promising solution to dynamically cooperate, in order to exploit advanced frequency sharing techniques. To this end, efficient sensing techniques for spectrum awareness are a must. In this paper, we provide preliminary results on energy detection (ED) and cyclostationary feature detection (CFD) algorithms applied to a downlink Ka-band scenario. These results show that coexistence between satellite and terrestrial networks is possible and cognitive radios can ease their integration in future 5G communications.","PeriodicalId":401040,"journal":{"name":"2015 23rd European Signal Processing Conference (EUSIPCO)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122689347","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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