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2009 17th European Signal Processing Conference最新文献

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Oversampling complex-modulated digital filter bank pairs suitable for extensive subband-signal amplification 过采样复调制数字滤波器组对，适用于广泛子带信号放大
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41411
Thomas Kurbiel, H. Göckler, D. Alfsmann
{"title":"Oversampling complex-modulated digital filter bank pairs suitable for extensive subband-signal amplification","authors":"Thomas Kurbiel, H. Göckler, D. Alfsmann","doi":"10.5281/ZENODO.41411","DOIUrl":"https://doi.org/10.5281/ZENODO.41411","url":null,"abstract":"Oversampling, complex-modulated digital subband coder filter banks are commonly adopted in modern hearing aids to allow for individual amplification of subband signals in order to compensate for hearing losses of impaired persons. Minimum power consumption and low group delay have been the main concern in the design of these filter banks. Guaranteeing frequency-independent and low group delay in case of subband-signal amplification has, however, been neglected in the past. In this contribution, we investigate the delay and amplification properties of oversampling complex-modulated FIR filter banks in case of extensive subband signal amplification. Based on these results, a sufficient condition for constant group delay is derived. Furthermore, we present a compensation method which allows for constant group delay, even if the sufficient condition is violated. An illustrative design example demonstrates the potential of the compensation method.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127786321","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
Video and audio based detection of filled hesitation pauses in classroom lectures 基于视频和音频的课堂讲课中填充犹豫停顿的检测
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41616
V. Tsiaras, C. Panagiotakis, Y. Stylianou
{"title":"Video and audio based detection of filled hesitation pauses in classroom lectures","authors":"V. Tsiaras, C. Panagiotakis, Y. Stylianou","doi":"10.5281/ZENODO.41616","DOIUrl":"https://doi.org/10.5281/ZENODO.41616","url":null,"abstract":"In this paper we study the detection of hesitation filled pauses in oral presentations of university lectures taught in the Greek language and recorded using a tablet PC via a specialized software. We suggest a hierarchical approach fusing video data with audio data for increasing the precision rate in our detection system. The detection method works at frame level rather than the usual segmental level for more accurate synchronization of audio and video data after removing the detected hesitations. Audio characteristics are modeled using Gaussian Mixture Models while the stationarity of the recorded video is taken into account. This efficient video and audio combination yields higher precision and recall rates comparing with other works in the literature. On a dataset of approximately 7 hours the precision rate is 99.6% while the recall rate is 84.7% when audio and video data are taken into account.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132687948","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
Application of the signal processing technology in the detection of Red Palm Weevil 信号处理技术在红棕象鼻虫检测中的应用
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41438
W. Hussein, M. Hussein, T. Becker
{"title":"Application of the signal processing technology in the detection of Red Palm Weevil","authors":"W. Hussein, M. Hussein, T. Becker","doi":"10.5281/ZENODO.41438","DOIUrl":"https://doi.org/10.5281/ZENODO.41438","url":null,"abstract":"The Red Palm Weevil (RPW) is the most destructive pest for the date palm in the world. The economic damage to palm crops due to RPW could be mitigated significantly by bioacoustics recognition in an earlier phase of infestation and applying the appropriate treatment. In this paper, a novel signal processing system is developed to detect the existence of RPW through its bioacoustics features. A large set of features are extracted, including some unconventional features which are temporal roll-off, temporal slope, and temporal spread. Since the recorded sound is divided into time frames, an analysis for the criteria behind the choice of the optimum time frame length, as well as the selection of the suitable window function is provided. The results imply the efficiency of the developed system with the selected representative features, window functions, and frame period to detect the existence of the RPW through its feeding sound.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133165519","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: 13
Fast algorithm for conditional separation and dereverberation 条件分离和去噪的快速算法
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41602
Takuya Yoshioka, T. Nakatani, M. Miyoshi
{"title":"Fast algorithm for conditional separation and dereverberation","authors":"Takuya Yoshioka, T. Nakatani, M. Miyoshi","doi":"10.5281/ZENODO.41602","DOIUrl":"https://doi.org/10.5281/ZENODO.41602","url":null,"abstract":"Last year, we proposed a conditional separation and dereverberation method (the CSD method) for simultaneously achieving blind source separation and dereverberation of sound mixtures. This paper presents a novel fast algorithm for implementing the CSD method. Most of the computation time of the CSD method is spent on calculating what we call modified correlation matrices. The proposed algorithm can calculate these modified correlation matrices much faster than the original algorithm. This improvement is realized by capitalizing on the particular structure of the modified correlation matrices. Experimental results obtained using 672 test samples revealed that the CSD method provided a much better signal-to-interference ratio than a frequency-domain blind source separation method. The real time factor of the proposed algorithm was between 4 and 6, which is less than one tenth that of the original algorithm.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134178748","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
Bounded Real Lemma for multivariate trigonometric matrix polynomials and FIR filter design applications 有界实数引理用于多元三角矩阵多项式和FIR滤波器的设计应用
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41318
B. Dumitrescu
{"title":"Bounded Real Lemma for multivariate trigonometric matrix polynomials and FIR filter design applications","authors":"B. Dumitrescu","doi":"10.5281/ZENODO.41318","DOIUrl":"https://doi.org/10.5281/ZENODO.41318","url":null,"abstract":"We propose a linear matrix inequality formulation of the Bounded Real Lemma (BRL) for multivariate trigonometric polynomials with matrix coefficients. This is a generalization of previous results regarding positive trigonometric polynomials. The proposed BRL allows the formulation of several FIR filter design problems as semidefinite programming (SDP) problems. We employ the new BRL in three applications: matrix filter design, 2-D deconvolution and design of 2-D filters with matrix coefficients. All applications are illustrated with examples that improve on previous work.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134417380","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
Alternative speech communication based on Cued Speech 基于线索语音的替代语音通信
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41291
P. Heracleous, N. Aboutabit, D. Beautemps
{"title":"Alternative speech communication based on Cued Speech","authors":"P. Heracleous, N. Aboutabit, D. Beautemps","doi":"10.5281/ZENODO.41291","DOIUrl":"https://doi.org/10.5281/ZENODO.41291","url":null,"abstract":"This study focuses on alternative speech communication based on Cued Speech. Cued Speech is a visual mode of communication that uses handshapes and placements in combination with the mouth movements of speech to make the phonemes of a spoken language look different from each other and clearly understandable to deaf and hearing-impaired people. Originally, the aim of Cued Speech was to overcome the problems of lip reading and thus enable deaf children and adults to wholly understand spoken language. In this study, we investigate the use of Cued Speech not only for perception, but also for speech production in the case of speech- or hearing-impaired individuals. The proposed method is based on hidden Markov model (HMM) automatic recognition. Automatic recognition of Cued Speech can be served as an alternative speech communication method for individuals with speech- or hearing impairments. This article presents vowel and consonant, and also isolated word recognition experiments for Cued Speech for French. The results obtained are promising and comparable to the results obtained when using audio signal.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114235755","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
H.264 video traffic modeling via Hidden Markov Process 基于隐马尔科夫过程的H.264视频流量建模
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41761
S. Colonnese, S. Rinauro, Lorenzo Rossi, G. Scarano
{"title":"H.264 video traffic modeling via Hidden Markov Process","authors":"S. Colonnese, S. Rinauro, Lorenzo Rossi, G. Scarano","doi":"10.5281/ZENODO.41761","DOIUrl":"https://doi.org/10.5281/ZENODO.41761","url":null,"abstract":"The H.264 video coding standard includes new syntactic structures that allow efficient drift-free switching among precoded sequences at different bit-rates, making H.264 standard suitable for video streaming in time-varying channels. In network design, a good modeling of the video source is desirable to achieve a good dimensioning. A model of the traffic generated by a bitstream switching source requires considering not only variations of the video sequence activity, as it occurs in modeling classic VBR sources but also global variations of the average bit-rate. In this work we study a synthetic source constituted by a Hidden Markov Process modeling a real bit-rate switching video source. Parameter estimation is performed by the Expectation-Maximization algorithm. Model accuracy is assessed by a comparison of the frame loss rate of a fixed size buffer filled with the synthetic source and with a real H.264 video source.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131311916","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
Robust adaptive modulation with imperfect channel information 具有不完全信道信息的鲁棒自适应调制
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41681
H. Du, Pei-Jung Chung, B. Mulgrew
{"title":"Robust adaptive modulation with imperfect channel information","authors":"H. Du, Pei-Jung Chung, B. Mulgrew","doi":"10.5281/ZENODO.41681","DOIUrl":"https://doi.org/10.5281/ZENODO.41681","url":null,"abstract":"Adaptive modulation is a promising technique to increase system throughput considerably. However, it relies on perfect channel state information (CSI), and is sensitive to errors in CSI. In this work, we maximize the system transmission rate based on a lower bound of average bit error rate (BER) while satisfying the transmit power and BER constraint. In order to further enhance the system throughput, adaptive modulation scheme is combined with a robust transmit beamformer to obtain extra diversity gain. Moreover, to pay the penalty for the lower bound of the average BER, we introduce a probabilistic constraint by keeping a low outage probability of signal-to-noise ratio (SNR). Simulation results show that the proposed scheme provides the maximum system throughput compared with several state-of-the-art robust adaptive schemes, and always guarantees the target BER.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131758641","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
Automatic intensity quantification of fluorescence targets from microscope images with maximum likelihood estimation 最大似然估计的显微镜图像荧光目标的自动强度定量
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41449
Harri Pölönen, Jussi Tohka, U. Ruotsalainen
{"title":"Automatic intensity quantification of fluorescence targets from microscope images with maximum likelihood estimation","authors":"Harri Pölönen, Jussi Tohka, U. Ruotsalainen","doi":"10.5281/ZENODO.41449","DOIUrl":"https://doi.org/10.5281/ZENODO.41449","url":null,"abstract":"We introduce a method to determine the quantitative intensity values and sub-pixel locations of closely located small targets from noisy fluorescence microscope images. We model the microscope image with a mixture of point spread functions and the image noise with a stochastic process containing Poisson distribution. Maximum likelihood estimation is used to find the optimal parameters for the model. Numerical ML estimation is performed with differential evolution optimization algorithm. To evaluate the methods, noisy simulated images were created with closely located targets. Methods were compared to conventional methods based on low-pass filtering and Gaussian mixture fitting, and the simulations show better accuracy for the new method. A real microscope image is also quantified to show that the model is applicable in practice.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133822484","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
Filter bank based multi-mode multiple access scheme for wireless uplink 基于滤波器组的无线上行多模多址方案
2009 17th European Signal Processing Conference Pub Date : 2009-08-24 DOI: 10.5281/ZENODO.41713
T. Ihalainen, Ari Viholainen, T. H. Stitz, M. Renfors, M. Bellanger
{"title":"Filter bank based multi-mode multiple access scheme for wireless uplink","authors":"T. Ihalainen, Ari Viholainen, T. H. Stitz, M. Renfors, M. Bellanger","doi":"10.5281/ZENODO.41713","DOIUrl":"https://doi.org/10.5281/ZENODO.41713","url":null,"abstract":"This paper investigates the potential of filter bank (FB) processing in the context of uplink multi-user access. First, a FB based scheme, conceptually similar to the single carrier frequency division multiple access (SC-FDMA) developed by 3GPP for uplink in the Long Term Evolution of UMTS, is analyzed. Specifically, a method for synthesizing spectrally well-localized uplink waveforms with low peak-to-average power ratio, using FB based multicarrier (FBMC) modulation in combination with FB spreading, is introduced. Secondly, the superior frequency selectivity of the FB approach, when combined with frequency sampling -designed subchannel/subband processing, is found to enable flexible and bandwidth efficient multi-mode uplink transmission with relaxed constraints on inter-user timing synchronization. The proposed concept allows different mobile terminals to operate in the reverse link simultaneously in multicarrier, SC-FDMA, or conventional single carrier mode according to attributes such as the required transmission power.","PeriodicalId":106989,"journal":{"name":"2009 17th European Signal Processing Conference","volume":"9 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133043368","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: 60
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