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Similarity measure for heterogeneous multivariate time-series 异构多元时间序列的相似性度量
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38368
F. Duchêne, C. Garbay, V. Rialle
{"title":"Similarity measure for heterogeneous multivariate time-series","authors":"F. Duchêne, C. Garbay, V. Rialle","doi":"10.5281/ZENODO.38368","DOIUrl":"https://doi.org/10.5281/ZENODO.38368","url":null,"abstract":"Defining the similarity of objects is crucial in any data analysis and decision-making process. For those which effectively deal with moving objects, the main issue becomes the comparison of trajectories, also referred to as time-series. Moreover, complex applications may require an object to be a multidimensional vector of heterogeneous parameters. In that paper, we propose a similarity measure for heterogeneous multivariate time-series using a non-metric distance based on the Longest Common Subsequence (LCSS). The proposed definition allows for imprecise matches, outliers, stretching and global translating of the sequences in time. We demonstrate the relevance of our approach in the context of identifying similar behaviors of a person at home.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128385626","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: 15
Spread spectrum watermarking for real images: Is everything so hopeless? 真实图像的扩频水印:一切都如此无望吗?
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38271
O. Koval, S. Voloshynovskiy, F. Pérez-González, F. Deguillaume, T. Pun
{"title":"Spread spectrum watermarking for real images: Is everything so hopeless?","authors":"O. Koval, S. Voloshynovskiy, F. Pérez-González, F. Deguillaume, T. Pun","doi":"10.5281/ZENODO.38271","DOIUrl":"https://doi.org/10.5281/ZENODO.38271","url":null,"abstract":"In this paper we perform the capacity analysis of known-host-statitistics watermarking methods based on spread spectrum (SS) under Additive Wight Gaussian noise (AWGN) attack. The reason of our research is based on the paradox that being non-effective in theory SS-based practical watermarking systems outperform known-host-state methods when a commonly accepted benchmarking strategy (Stirmark benchmark) is used. We show that the gap in capacity of SS-based techniques with respect to quantization-based techniques at high WNR regime could be significantly reduced, if the embedding scenario is designed using a proper stochastic model of the host image at the encoder. We show how the practical solution of watermark power allocation problem relates to the optimal one. In particular, we model the host image as an Autoregressive Process of the first order (AR(1)) and show the results of power allocation based on the water-pouring principle. It is pointed out that water-mark spectrum in a real system that is properly shaped using Contrast Sensitivity Function (CSF) well-approximates the water-pouring solution. Finally, we perform several tests to analyze the modified SS capacity facing AWGN attack. Experimental results show that host interference in this case is significantly weakened, which leads to a noticeable capacity improvement.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130319814","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
C-based hardware design of IMDCT accelerator for Ogg Vorbis decoder 基于c语言的Ogg Vorbis解码器IMDCT加速器硬件设计
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38541
Shinichi Maeta, A. Kosaka, A. Yamada, T. Onoye, T. Chiba, I. Shirakawa
{"title":"C-based hardware design of IMDCT accelerator for Ogg Vorbis decoder","authors":"Shinichi Maeta, A. Kosaka, A. Yamada, T. Onoye, T. Chiba, I. Shirakawa","doi":"10.5281/ZENODO.38541","DOIUrl":"https://doi.org/10.5281/ZENODO.38541","url":null,"abstract":"This paper presents hardware design of an IMDCT accelerator for an Ogg Vorbis decoder using a C-based design system. Low power implementation of audio codec is important in order to achieve long battery life of portable audio devices. Through the computational cost analysis of the whole decoding process, it is found that Ogg Vorbis requires higher operation frequency of an embedded processor than MPEG Audio. In order to reduce the CPU load, an accelerator is designed as specific hardware for IMDCT, which is detected as the most computation-intensive functional block. Real-time decoding of Ogg Vorbis is achieved with the accelerator and an embedded processor both run at 36MHz. The operation frequency is at the same level as that of MPEG Audio decoding process by an embedded processor.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124176258","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
Coding and signal processing for multiple-antenna transmission and reception: Iterative receiver structures 多天线发射与接收的编码与信号处理:迭代接收机结构
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38717
E. Biglieri, A. Nordio, G. Taricco
{"title":"Coding and signal processing for multiple-antenna transmission and reception: Iterative receiver structures","authors":"E. Biglieri, A. Nordio, G. Taricco","doi":"10.5281/ZENODO.38717","DOIUrl":"https://doi.org/10.5281/ZENODO.38717","url":null,"abstract":"We describe, in a semitutorial fashion, a fairly general class of iterative receivers for multiple-antenna systems. These receivers combine a soft decoder for a space-time code with a spatial-interference canceler. The performance of these receivers is analyzed by using EXIT charts, a convenient graphical description that yields quite accurate results. By properly combining the EXIT characteristics of the canceler and of the decoder, the convergence behavior of the iterative algorithms can be understood, and design guidelines derived. The idea here is to observe that both the interference canceler and the decoder can be studied by examining the evolution of the extrinsic information passed along to the connected blocks.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121347669","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
Generalized stochastic principle for microphone array speech enhancement and applications to car environments 扩音器阵列语音增强的广义随机原理及其在车载环境中的应用
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38664
R. Balan, J. Rosca, C. Beaugeant, Virginie Gilg, T. Fingscheidt
{"title":"Generalized stochastic principle for microphone array speech enhancement and applications to car environments","authors":"R. Balan, J. Rosca, C. Beaugeant, Virginie Gilg, T. Fingscheidt","doi":"10.5281/ZENODO.38664","DOIUrl":"https://doi.org/10.5281/ZENODO.38664","url":null,"abstract":"In this paper we present novel solutions for microphone array speech enhancement systems that intelligently use the multipath environment to enhance signal coming from a desired location. We obtain a statistical principle that explains previously known factorization results of optimal beamformers, and proves a similar factorization holds for other new optimal estimators. Our solution requires a low computational load, and can be deployed on most of the platforms. We present speech recognition rates on real data, and compare a stereo versus a mono solution on this database.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121353088","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
Face authentication and non-standard image geometries: Issues, results and prospects 人脸认证和非标准图像几何:问题，结果和前景
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38712
M. Tistarelli, E. Grosso, A. Lagorio
{"title":"Face authentication and non-standard image geometries: Issues, results and prospects","authors":"M. Tistarelli, E. Grosso, A. Lagorio","doi":"10.5281/ZENODO.38712","DOIUrl":"https://doi.org/10.5281/ZENODO.38712","url":null,"abstract":"The analysis of biological features for the recognition of humans attracted the interest of many researchers in the last decades. Despite the considerable efforts, in many cases, the dimensionality of the data and the complexity of the matching problem made it difficult to devise fully operational authentication systems. This is probably also the reason of the greatest diffusion of other biometric modalities such as fingerprint and iris scanning. As in other applications, the adoption of non-standard image sampling geometries may both reduce the dimensionality of the data and the complexity of the recognition problem. In this paper we will try to demonstrate that this is true also in the case of face image analysis where non-standard imaging geometries can be successfully applied.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116356210","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
Generalized adaptive notch filters for identification of real quasi-periodically varying systems 广义自适应陷波滤波器用于实际准周期变化系统的辨识
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38423
M. Niedźwiecki, Piotr Kaczmarek
{"title":"Generalized adaptive notch filters for identification of real quasi-periodically varying systems","authors":"M. Niedźwiecki, Piotr Kaczmarek","doi":"10.5281/ZENODO.38423","DOIUrl":"https://doi.org/10.5281/ZENODO.38423","url":null,"abstract":"The problem of identification/tracking of quasi-periodically varying systems is considered. This problem is a generalization, to the system case, of a classical signal processing task of either elimination or extraction of nonstationary sinusoidal signals buried in noise.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121735365","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
Efficient scalable motion coding for wide-range scalable video compression 有效的可扩展的运动编码的大范围可扩展的视频压缩
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38492
Guillaume Boisson, E. François, C. Guillemot
{"title":"Efficient scalable motion coding for wide-range scalable video compression","authors":"Guillaume Boisson, E. François, C. Guillemot","doi":"10.5281/ZENODO.38492","DOIUrl":"https://doi.org/10.5281/ZENODO.38492","url":null,"abstract":"For a scalable video coder to cover a wide range of bit-rates, e.g. from mobile video streaming applications to TV broadcasting, it is essential that motion information presents some form of scalability. In this paper we propose a new accuracy-scalable motion codec in a wavelet-based spatio-SNR-temporal-scalable framework. It allows to decode a reduced amount of motion information at sub-resolutions, taking advantage that motion compensation requires less and less accuracy at lower spatial resolutions. This new motion codec proves its efficiency in our full-scalable framework, by improving significantly video quality at sub-resolutions without inducing any noticeable penalty at high bit-rates.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471602","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
Wideband UTP cable measurements and modelling for MIMO systems MIMO系统的宽带UTP电缆测量和建模
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38666
N. Nedev, S. Mclaughlin, J. Cook
{"title":"Wideband UTP cable measurements and modelling for MIMO systems","authors":"N. Nedev, S. Mclaughlin, J. Cook","doi":"10.5281/ZENODO.38666","DOIUrl":"https://doi.org/10.5281/ZENODO.38666","url":null,"abstract":"This paper presents wideband MIMO cable measurements of a 10-pair 0.4mm UTP cable, which are then used to parameterise and verify the Joffe MIMO channel model for UTP transmission lines. The frequency dependance of the model parameters is pointed out, and prediction results based on various parameter sets are compared. The aim of the paper is to illustrate problems in the modelling accuracy which still exist at high frequencies.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126403906","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
Development of 4 × 4 MIMO-OFDM system and test measurement 4 × 4 MIMO-OFDM系统开发及测试测量
2004 12th European Signal Processing Conference Pub Date : 2004-09-06 DOI: 10.5281/ZENODO.38370
K. Mizutani, K. Sakaguchi, J. Takada, K. Araki
{"title":"Development of 4 × 4 MIMO-OFDM system and test measurement","authors":"K. Mizutani, K. Sakaguchi, J. Takada, K. Araki","doi":"10.5281/ZENODO.38370","DOIUrl":"https://doi.org/10.5281/ZENODO.38370","url":null,"abstract":"We are developing a compact PCI (cPCI) based prototype of a 4 × 4 multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system for the measurement and analysis of propagation and transmission characteristics in real environments. The target of this system is a MIMO extension of the IEEE802.11a standard, i.e. 5 GHz frequency band, 20 MHz bandwidth. The sampling rates of digital-analog converters (DACs) and analog-digital converters (ADCs) are both 80 Msps, thus enabling 20 MHz bandwidth measurements. In addition, 2 Mgates field programmable gate arrays (FPGAs) are used for pre- and post-processing of each channel, so that we can take advantage of the FPGA's parallel processing capability for simultaneous multichannel processing as well as its reconfigurability for implementation of various MIMO-OFDM algorithms.","PeriodicalId":347658,"journal":{"name":"2004 12th European Signal Processing Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127984939","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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