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Video background subtraction using online infinite dirichlet mixture models 基于在线无限狄利克雷混合模型的视频背景减法
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43364
Wentao Fan, N. Bouguila
{"title":"Video background subtraction using online infinite dirichlet mixture models","authors":"Wentao Fan, N. Bouguila","doi":"10.5281/ZENODO.43364","DOIUrl":"https://doi.org/10.5281/ZENODO.43364","url":null,"abstract":"Video background subtraction is an essential task in computer vision for detecting moving objects in video sequences. In this paper, we propose a novel Bayesian nonparametric statistical approach to subtract video background. The proposed approach is based on a mixture of Dirichlet processes with Dirichlet distributions, which can be considered as an infinite Dirichlet mixture model. Compared to other background subtraction approaches, the proposed one has the advantages that it is more robust and adaptive to dynamic background, and it has the ability to handel multi-modal background distributions. Moreover, thanks to the nature of nonparametric Bayesian models, the determination of the correct number of components is sidestepped by assuming that there is an infinite number of components. Our results demonstrate the merits of the proposed approach.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116337565","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
Ofdm receiver design in the presence of frequency selective iq imbalance and CFO 存在频率选择iq不平衡和CFO的Ofdm接收机设计
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43728
Muhammad Asim, M. Ghogho, D. McLernon
{"title":"Ofdm receiver design in the presence of frequency selective iq imbalance and CFO","authors":"Muhammad Asim, M. Ghogho, D. McLernon","doi":"10.5281/ZENODO.43728","DOIUrl":"https://doi.org/10.5281/ZENODO.43728","url":null,"abstract":"Direct conversion receivers (DCR) are the preferred choice for the RF front-end in modern communication devices. These devices are simple and cheap to implement but for the case of sensitive multicarrier systems these devices may not maintain the required level of performance as regards image rejection (IR), carrier frequency offset (CFO) and direct current offset. In the presence of this non-ideal behaviour it is not possible to achieve a high signal to interferer ratio (SIR). This situation necessitates the use of digital signal processing (DSP) schemes to efficiently mitigate these effects and also to relax the stringent requirements on receiver design. In this paper we study the design of a receiver architecture which can jointly estimate the channel impulse response (CIR), IQ imbalance and CFO using long training sequences (LTS) which are already a part of WLAN standards. The proposed schemes provide an excellent performance/complexity tradeoff.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128325290","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
Advanced speech enhancement with partial speech reconstruction 部分语音重建的高级语音增强
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43592
P. Hannon, M. Krini, Ingo Schalk-Schupp
{"title":"Advanced speech enhancement with partial speech reconstruction","authors":"P. Hannon, M. Krini, Ingo Schalk-Schupp","doi":"10.5281/ZENODO.43592","DOIUrl":"https://doi.org/10.5281/ZENODO.43592","url":null,"abstract":"An advanced speech enhancement algorithm is proposed, which employs partial speech reconstruction of highly disturbed speech. The speech reconstruction algorithms assume the source-filter model of speech production and construct estimates of clean speech source and filter signals using features extracted from noisy input. A nonlinear harmonic regeneration scheme for source signals is presented followed by two methods for the estimation of the vocal tract filter characteristics. The quantization method applies a priori trained codebooks using clean speech training data and the parametric estimation method assumes a parabolic continuation of low frequency envelope values. The predicted speech quality of the enhanced speech output is assessed with composite objective measures, while the accuracy of the spectral envelope estimations is analyzed with the log-spectral distance over four manually generated signal-to-noise ratio scenarios.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128391859","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
Accuracy limits of a seam-tracking algorithm for microwave systems at mm-wave frequencies 毫米波频率下微波系统缝迹跟踪算法的精度限制
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43446
J. Schrattenecker, Stefan Dipl.-Ing. Schuster, A. Haderer, G. Reinthaler, A. Stelzer
{"title":"Accuracy limits of a seam-tracking algorithm for microwave systems at mm-wave frequencies","authors":"J. Schrattenecker, Stefan Dipl.-Ing. Schuster, A. Haderer, G. Reinthaler, A. Stelzer","doi":"10.5281/ZENODO.43446","DOIUrl":"https://doi.org/10.5281/ZENODO.43446","url":null,"abstract":"This paper examines a novel concept for estimating the position of a lap joint based on polarimetric scattering effects. While the principle measurement method and setup have already been presented in [1] we focus on the associated accuracy limits, i.e., the Cramér-Rao lower bound (CRLB) calculation for this approach. The minimum achievable position estimation variance is calculated for a variety of estimation scenarios. These calculations are then validated with simulations and real world measurements.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134144883","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
Non-uniform spectrum sensing for Cognitive Radio using sub-nyquist sampling 基于亚奈奎斯特采样的认知无线电非均匀频谱感知
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43508
Babar Aziz, S. Traore, Daniel Le Guennec
{"title":"Non-uniform spectrum sensing for Cognitive Radio using sub-nyquist sampling","authors":"Babar Aziz, S. Traore, Daniel Le Guennec","doi":"10.5281/ZENODO.43508","DOIUrl":"https://doi.org/10.5281/ZENODO.43508","url":null,"abstract":"Spectrum sensing is the very task upon which the entire operation of Cognitive Radio rests. In this paper, we propose a spectrum sensing technique based on the estimates of the spectrum of a multiband signal obtained from its compressed samples. We show that our proposed spectrum sensing method provides accurate results using less data samples. We also show the effect of false detection on the average sampling rate of a non-uniform sub-Nyquist sampler.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133346726","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
Fourier-based methods for the spectral analysis of musical sounds 基于傅立叶的乐音频谱分析方法
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43597
S. Marchand
{"title":"Fourier-based methods for the spectral analysis of musical sounds","authors":"S. Marchand","doi":"10.5281/ZENODO.43597","DOIUrl":"https://doi.org/10.5281/ZENODO.43597","url":null,"abstract":"When dealing with musical sounds, the short-time Fourier transform prevails and sinusoids play a key role, according to both acoustics (vibrating modes) and psychoacoustics (pure tones). The values obtained when decomposing the signal on the time-frequency atoms are usually assigned to their geometrical center, leading to estimation errors for the sinusoidal parameters. To correct this, one can exploit the amplitude or phase information, use the derivatives of the analysis window, or those of the audio signal. This leads to three methods (phase vocoder, spectral reassignment, derivative algorithm) equally efficient: they are in fact different formulations of the best analysis method based on the Fourier spectrum.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126907329","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
Performance index for tensor polyadic decompositions 张量多进分解的性能指标
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43613
P. Comon, K. Minaoui, Awatif Rouijel, D. Aboutajdine
{"title":"Performance index for tensor polyadic decompositions","authors":"P. Comon, K. Minaoui, Awatif Rouijel, D. Aboutajdine","doi":"10.5281/ZENODO.43613","DOIUrl":"https://doi.org/10.5281/ZENODO.43613","url":null,"abstract":"It is proposed to isolate the computation of the scaling matrix in CP tensor decompositions. This has two implications. First, the conditioning of the problem shows up explicitly, and could be controlled via a constraint on the so-called coherences. Second, a performance measure concerning only the factor matrices can be exactly calculated, and does not present the optimistic bias of the minimal error generally utilized in the literature. In fact, for tensors of order d, it suffices to solve a degree-2 polynomial system in d variables. We subsequently give an explicit solution when d = 3.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126910188","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
A fast compressive sensing method with application to network echo cancellation 一种用于网络回波消除的快速压缩感知方法
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43612
Pratik Shah, S. Grant, J. Benesty
{"title":"A fast compressive sensing method with application to network echo cancellation","authors":"Pratik Shah, S. Grant, J. Benesty","doi":"10.5281/ZENODO.43612","DOIUrl":"https://doi.org/10.5281/ZENODO.43612","url":null,"abstract":"Compressive sensing methods have been effectively used for sparse system identification. Many methods have been proposed to exploit this sparsity to reduce the amount of data required for identification. Most though, have high computational complexity. Recently, an iterative method based on the proportionate affine projection algorithm with row action projections (iPAPA-RAP) has been shown to have good convergence properties with relatively low complexity. Here, we present extensions of that algorithm that significantly speed convergence and as a result lower overall computational complexity. The main improvement is the addition of a zero attractor step with a variable scale factor. Significantly, this scale factor is made to be a function of the sparsity of the estimated system parameters. This greatly improves the convergence behavior of the resulting algorithm. It is compared with iteratively reweighted least-squares (IRLS) and l0 - zero attracting projections (l0-ZAP). Results show that the proposed algorithm converges faster with lower overall complexity.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122043324","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
Compressive and non-compressive reliable wideband spectrum sensing at sub-Nyquist rates 压缩和非压缩可靠的宽带频谱传感在亚奈奎斯特速率
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43588
B. I. Ahmad, M. Al-Ani, A. Tarczynski, Wei Dai, Cong Ling
{"title":"Compressive and non-compressive reliable wideband spectrum sensing at sub-Nyquist rates","authors":"B. I. Ahmad, M. Al-Ani, A. Tarczynski, Wei Dai, Cong Ling","doi":"10.5281/ZENODO.43588","DOIUrl":"https://doi.org/10.5281/ZENODO.43588","url":null,"abstract":"A significant challenge of cognitive radio (CR) is to monitor wide ranges of the radio spectrum and unveil vacant spectrum subbands, whilst operating at affordable data acquisition rates. In this paper, we evaluate a number of wideband spectrum sensing techniques that alleviate the data acquisition rate bottleneck by operating at remarkably low sub-Nyquist rates; thus dubbed sub-Nyquist spectrum sensing. These methods were independently developed and are rarely (if at all) compared. Among other deductions, the non-compressive sub-Nyquist approach is shown to have numerous benefits and delivers competitive detection performance compared with techniques based on the compressive sensing methodology.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123493179","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
What do we feel about archetypes: Self-reports and physiological signals 我们对原型有什么感觉:自我报告和生理信号
21st European Signal Processing Conference (EUSIPCO 2013) Pub Date : 2013-09-09 DOI: 10.5281/ZENODO.43427
Huang-Ming Chang, Leonid Ivonin, M. Díaz, Andreu Català, Wei Chen, G.W.M. Rauterberg
{"title":"What do we feel about archetypes: Self-reports and physiological signals","authors":"Huang-Ming Chang, Leonid Ivonin, M. Díaz, Andreu Català, Wei Chen, G.W.M. Rauterberg","doi":"10.5281/ZENODO.43427","DOIUrl":"https://doi.org/10.5281/ZENODO.43427","url":null,"abstract":"In research on emotion, presenting affective stimuli has been believed to be an effective and reliable technique for emotion elicitation. Instead of collecting stimuli for pre-defined emotions, we propose to develop stimuli based on their symbolic meanings. We adopted archetypal symbolism as a standard to edit eight movie clips of archetypes as a new set of affective stimuli. These stimuli were used in an experiment for emotion elicitation. Participants' emotional responses toward these stimuli of archetypes were measured by the self-report technique and the physiological measurement. The results of linear discriminant analysis show that physiological measurement is more robust than the self-report techniques in recognizing emotions toward stimuli of archetypes. However, it is still unclear which technique reflects the ground truth of human emotion. We discuss alternative implications of these results, and provide more research questions for future studies on emotion recognition and model development.","PeriodicalId":400766,"journal":{"name":"21st European Signal Processing Conference (EUSIPCO 2013)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705330","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
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