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2010 18th European Signal Processing Conference最新文献

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Greedy sparse reconstruction of non-negative signals using symmetric alpha-stable distributions 利用对称稳定分布的非负信号贪婪稀疏重构
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41921
G. Tzagkarakis, P. Tsakalides
{"title":"Greedy sparse reconstruction of non-negative signals using symmetric alpha-stable distributions","authors":"G. Tzagkarakis, P. Tsakalides","doi":"10.5281/ZENODO.41921","DOIUrl":"https://doi.org/10.5281/ZENODO.41921","url":null,"abstract":"An accurate representation of the acquired data, while also conserving limited resources, such as power, bandwidth and storage capacity, is a challenging task. Besides, the Gaussian assumption, which plays a predominant role in signal processing being widely used as a signal and noise model, is unrealistic for a wide range of real-world data, which can be highly sparse in appropriate orthonormal bases. In the present work, the inherent property of compressed sensing (CS) working simultaneously as a sensing and compression protocol using a small subset of random projections is exploited to reduce the total amount of data. In particular, we propose a novel iterative algorithm for sparse representation and reconstruction of nonnegative signals in highly impulsive background using the family of symmetric alpha-stable distributions. The experimental evaluation shows that our proposed method results in an increased reconstruction performance, while also achieving a higher sparsity when compared with state-of-the-art CS algorithms.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"12 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127049540","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
Robust temporal alignment of spontaneous and dubbed speech and its application for automatic dialogue replacement 自发和配音语音的鲁棒时间对齐及其在自动对话替换中的应用
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42077
Pieter Soens, W. Verhelst
{"title":"Robust temporal alignment of spontaneous and dubbed speech and its application for automatic dialogue replacement","authors":"Pieter Soens, W. Verhelst","doi":"10.5281/ZENODO.42077","DOIUrl":"https://doi.org/10.5281/ZENODO.42077","url":null,"abstract":"In this paper, we present a robust system for the temporal alignment of 2 renditions of the same speech utterance. The system operates in 2 steps: during analysis, the timing relationships between the speech segments of the utterance that serves as a timing reference and the corresponding speech segments in the replacement utterance are measured by means of a dedicated dynamic time warping algorithm. The obtained warping paths are then processed and used to synthesize a high-quality speech utterance that is time-aligned with the reference. Subjective audio-visual listening tests performed within the context of a difficult Automatic Dialogue Replacement task demonstrated that the proposed system achieves a significant improvement compared to the industry-standard benchmark, both in terms of achieved lip-synchronization accuracy as well as in overall sound quality of the synthesized utterances.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125803375","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
Pushing the RIP phase transition in compressed sensing 压缩感知中推进RIP相变
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42132
Jeffrey D. Blanchard, Andrew Thompson
{"title":"Pushing the RIP phase transition in compressed sensing","authors":"Jeffrey D. Blanchard, Andrew Thompson","doi":"10.5281/ZENODO.42132","DOIUrl":"https://doi.org/10.5281/ZENODO.42132","url":null,"abstract":"We apply the asymmetric restricted isometry property (ARIP) to recent results of Cai, Wang, and Xu and formulate a two-parameter family of sufficient conditions for exact k-sparse signal recovery via ℓ1-minimization. We translate the sufficient conditions into the phase transition framework and apply bounds on the ARIP constants to define lower bounds on the phase transition. By selecting the parameters wisely, we determine sufficient conditions whose phase transition curves improve upon those already in the literature.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122677910","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
A multimodal approach to initialisation for top-down speaker diarization of television shows 电视节目自顶向下说话人初始化的多模态方法
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41986
Simon Bozonnet, Félicien Vallet, N. Evans, S. Essid, G. Richard, J. Carrive
{"title":"A multimodal approach to initialisation for top-down speaker diarization of television shows","authors":"Simon Bozonnet, Félicien Vallet, N. Evans, S. Essid, G. Richard, J. Carrive","doi":"10.5281/ZENODO.41986","DOIUrl":"https://doi.org/10.5281/ZENODO.41986","url":null,"abstract":"This paper presents a new multimodal approach to speaker diarization of TV show data. We hypothesize that the intraspeaker variation in visual information might be less than that in the corresponding acoustic information and therefore might be better suited to the task of speaker model initialisation. This is an acknowledged weakness of the computationally efficient top-down approach to speaker diarization that is used here. Experimental results show that a recently proposed approach to purification and the new multimodal approach to initialisation together deliver 22% and 17% relative improvements in diarization performance over the baseline system on independent development and evaluation datasets respectively.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130727462","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: 12
Efficient low delay filtering for residual echo suppression 有效的低延迟滤波抑制残留回波
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41890
Christelle Yemdji, M. M. Idrissa, N. Evans, C. Beaugeant
{"title":"Efficient low delay filtering for residual echo suppression","authors":"Christelle Yemdji, M. M. Idrissa, N. Evans, C. Beaugeant","doi":"10.5281/ZENODO.41890","DOIUrl":"https://doi.org/10.5281/ZENODO.41890","url":null,"abstract":"In telecommunications terminals speech quality is often degraded by acoustic echo. Various approaches to echo cancellation have been proposed and generally involve two separate stages, namely those of adaptive echo cancellation and, as is the focus here, residual echo suppression. Whilst computationally efficient, residual echo suppression approaches based on gain loss control have poor double talk performance. Sub-band approaches give better performance but generally introduce a significant signal delay. This paper reports new experimental work which assesses the performance of three low delay approaches to suppress residual echo through time domain convolution. Results show that a new approach, based on the inverse discrete Fourier transform, performs as well as the existing approaches for both linear and non-linear echo whilst maintaining computational efficiency and low signal delay.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127620855","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
Performance analysis of 2D and 3D antenna arrays for source localization 二维和三维天线阵列源定位性能分析
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41886
Dinh Thang Vu, A. Renaux, R. Boyer, S. Marcos
{"title":"Performance analysis of 2D and 3D antenna arrays for source localization","authors":"Dinh Thang Vu, A. Renaux, R. Boyer, S. Marcos","doi":"10.5281/ZENODO.41886","DOIUrl":"https://doi.org/10.5281/ZENODO.41886","url":null,"abstract":"In the context of passive sources localization using an antenna array, estimation performance in terms of elevation and azimuth is related to the kind of estimator used, and also to the geometry of the considered antenna array. Although there are several available results in the literature about linear and circular arrays, other possible geometries have been less studied. In this paper, we study the impact of the array geometry for two kinds of antenna arrays: the so called V-shaped antenna array (2D) and its 3D extension. The Cramér Rao lower Bound (CRB) will be used in this context as a useful tool to find the optimal configuration. The performance of the proposed antenna arrays is verified by comparing its CRB to the one of the standard uniform circular antenna from both analytical and simulation results.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129588603","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: 27
Multi-band pre-echo control using a filterbank equalizer 使用滤波器组均衡器的多频带预回声控制
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42160
B. Geiser, Martin Roggendorf, P. Vary
{"title":"Multi-band pre-echo control using a filterbank equalizer","authors":"B. Geiser, Martin Roggendorf, P. Vary","doi":"10.5281/ZENODO.42160","DOIUrl":"https://doi.org/10.5281/ZENODO.42160","url":null,"abstract":"We propose a new method to mitigate so called “pre-echo artifacts” that occur with transform-based audio codecs owing to their comparatively large block lengths. Our algorithm operates entirely in the time domain. In contrast to previous time domain approaches, a frequency selective pre-echo control (PEC) is achieved by applying the concept of a filterbank equalizer (FBE) with non-uniform frequency resolution. As an example application, the new PEC approach has been used to enhance the ITU-T G.722.1C super-wideband codec. The performance of the algorithm has been objectively measured and optimized w.r.t. various FBE parameters. Considerable quality gains could be obtained which are confirmed by the subjective listening impression. The proposed algorithm can be easily extended to act as an adaptive spectro-temporal pre- and deemphasis filter.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130944713","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
Digital transmitter I/Q imbalance calibration: Real-time prototype implementation and performance measurement 数字变送器I/Q不平衡校准:实时原型实现和性能测量
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41870
Olli Mylläri, L. Anttila, M. Valkama
{"title":"Digital transmitter I/Q imbalance calibration: Real-time prototype implementation and performance measurement","authors":"Olli Mylläri, L. Anttila, M. Valkama","doi":"10.5281/ZENODO.41870","DOIUrl":"https://doi.org/10.5281/ZENODO.41870","url":null,"abstract":"Nowadays, the direct-conversion and the low-IF transceiver principles are seen as the most promising architectures for future flexible radios. Both of the architectures employ complex I/Q mixing for up- and downconversion. Consequently, the performance of the transceiver architectures can be seriously deteriorated by the phenomenon called I/Q imbalance. I/Q imbalance stems from relative amplitude and phase mismatch between I- and Q-branches of the transceiver. As a result, self-interference or adjacent channel interference is introduced. This paper addresses details of the real-time prototype implementation of the transceiver unit realizing widely-linear least-squares based I/Q imbalance estimation algorithm and corresponding pre-distortion structure proposed earlier by the authors. First the estimation itself is reviewed and a recursive version of it is derived. After that, implementation related practical issues are addressed and implementation platform is also briefly introduced. Finally, implementation details and comprehensive RF measurement results from the real-time implementation are presented.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121299420","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: 17
DOA estimation in the presence of unknown colored noise, the global matched filter approach 在存在未知彩色噪声的DOA估计中，采用全局匹配滤波方法
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41858
J. Fuchs
{"title":"DOA estimation in the presence of unknown colored noise, the global matched filter approach","authors":"J. Fuchs","doi":"10.5281/ZENODO.41858","DOIUrl":"https://doi.org/10.5281/ZENODO.41858","url":null,"abstract":"The problem of the localization of multiple narrow band sources in the presence of arbitrary noise of unknown spatial spectral density is addressed. The array geometry can be arbitrary but must be known. The spatial noise spectrum is described using a sufficiently rich class of models that somehow covers the set of rational spectra. The Global Matched Filter is used to identify the characteristics of the sources that are present and to get a approximate model of the unknown colored noise. It is a technique that can be seen as a model-fitting or sparse representation approach in which the observations are decomposed on the association of different bases of candidate models. The computational complexity is reasonable and the performance are quite good and compare favorably with other methods.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131770700","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: 3
Maximum likelihood and orthogonal subspace based approach for improved IR-UWB channel estimation 基于极大似然和正交子空间的改进IR-UWB信道估计方法
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41950
R. Akbar, E. Radoi, S. Azou
{"title":"Maximum likelihood and orthogonal subspace based approach for improved IR-UWB channel estimation","authors":"R. Akbar, E. Radoi, S. Azou","doi":"10.5281/ZENODO.41950","DOIUrl":"https://doi.org/10.5281/ZENODO.41950","url":null,"abstract":"Indoor propagation channel appears differently to ultrawideband (UWB) systems than it does to narrowband systems. UWB signals have very high temporal resolution ability and this implies a frequency-selective channel with rich multipath in practice. To capture the signal energy spread over a multipath environment, a Rake receiver consisting of multiple parallel correlators is used. Performance of UWB systems employing Rake receivers is highly dependent on synchronization and the channel estimation. The channel parameters are the attenuations and delays incurred by the UWB signal along the propagation paths. Maximum-Likelihood (ML) and orthogonal subspace (OS) based methods are considered to estimate the parameters for IEEE 802.15.3a standard indoor multipath channel model. Analyzing the limitations and benefits of these methods, a new combined approach is proposed to improve channel parameter estimation.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"34 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132440041","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
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