Proceedings ELMAR 2006最新文献

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Fiber to the Home - The Tipping Point 光纤到家——引爆点
Proceedings ELMAR 2006 Pub Date : 2006-06-01 DOI: 10.1109/ELMAR.2006.329582
P. Valožić, M. Krznarić
{"title":"Fiber to the Home - The Tipping Point","authors":"P. Valožić, M. Krznarić","doi":"10.1109/ELMAR.2006.329582","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329582","url":null,"abstract":"Future of a dynamic process is hard and ungrateful to predict. The intention of this paper is to look at areas of further optical networks development and to consider some environmental circumstances for the next step forward-fiber to the home. Experience from the own communication past and examples chosen, may be a clue for the best direction. It is likely that somewhere along that trace the fiber-to-the-home tipping point is hidden","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132980424","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
Reversible watermarking scheme for image authentication in frequency domain 频率域图像认证的可逆水印方案
Proceedings ELMAR 2006 Pub Date : 2006-06-01 DOI: 10.1109/ELMAR.2006.329513
R. Baušys, A. Kriukovas
{"title":"Reversible watermarking scheme for image authentication in frequency domain","authors":"R. Baušys, A. Kriukovas","doi":"10.1109/ELMAR.2006.329513","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329513","url":null,"abstract":"Currently any digital media can be easily modified. As a measure to ensure authenticity of the media in question, watermarks may be used. However, for a specific media (military or medical imagery) modifications introduced by watermarking process are not acceptable. Reversible watermarking, that allows to restore exact original image, is designed for this usage. In this paper semi-blind reversible pixel-wise image authentication framework is proposed. The scheme allows us to authenticate and locate tampered pixels. Also exact recovery of the original image is possible","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133889182","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: 19
Rating in Next Generation Mobile Networks based on a directed graph 基于有向图的下一代移动网络评级
Proceedings ELMAR 2006 Pub Date : 2006-06-01 DOI: 10.1109/ELMAR.2006.329542
B. Leitem, Z. Windisch
{"title":"Rating in Next Generation Mobile Networks based on a directed graph","authors":"B. Leitem, Z. Windisch","doi":"10.1109/ELMAR.2006.329542","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329542","url":null,"abstract":"As a result of the development of mobile communication various kinds of new services have become accessible, thus new requirements are appearing on billing. The simplicity of the classic time based charging is a thing of the past. A calculation model is needed that fills the requirements of present days, looks into the future and is able to be customized for services unknown at the present time. We made a description of optional charging methods possible. Our new model can be customized with parameters. It can be easily converted into efficient calculation forms because of its settled structure and it's applicable for both online and offline charging in order to help integrate them","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121238913","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
The Concept of Task Specific Speech Database for VAD Systems VAD系统中任务特定语音数据库的概念
Proceedings ELMAR 2006 Pub Date : 2006-06-01 DOI: 10.1109/ELMAR.2006.329539
J. Kacur
{"title":"The Concept of Task Specific Speech Database for VAD Systems","authors":"J. Kacur","doi":"10.1109/ELMAR.2006.329539","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329539","url":null,"abstract":"The aim of this article is to present a concept of small size, low cost, and stile flexible speech database especially designed for the pin-poses of construction and evaluation of voice activity detection systems. As an example of the concept the Slovak speech database for VAD systems is introduced. It covers wide range of SNR ratios that can be automatically adjusted, according to both general and particular applications. It consists of specially selected isolated words with time labeled occurrences which keeps its size small while enabling its automatic handling. The evaluation of the database was performed by 2 VAD algorithms and compared to the SPEECON database (Spanish version). Observed outcomes fully justify its design and encourage its use for the development and evaluation of high performance VAD systems","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129343190","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
Wavelet Based Image Denoising with A Mixture of Gaussian Distributions with Local Parameters 基于局部参数高斯混合分布的小波图像去噪
Proceedings ELMAR 2006 Pub Date : 2006-06-01 DOI: 10.1109/ELMAR.2006.329521
H. Rabbani, M. Vafadoost, I. Selesnick
{"title":"Wavelet Based Image Denoising with A Mixture of Gaussian Distributions with Local Parameters","authors":"H. Rabbani, M. Vafadoost, I. Selesnick","doi":"10.1109/ELMAR.2006.329521","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329521","url":null,"abstract":"The performance of various estimators, such as maximum a posteriori (MAP) is strongly dependent on correctness of the proposed model for noise-free data distribution. Therefore, the selection of a proper model for distribution of wavelet coefficients is very important in the wavelet based image denoising. This paper presents a new image denoising algorithm based on the modeling of wavelet coefficients in each subband with a mixture of Gaussian probability density functions (pdfs) that parameters of mixture model are local. The mixture model is able to capture the heavy-tailed nature of wavelet coefficients and the local parameters can model the empirically observed correlation between the coefficient amplitudes. Therefore, by using this relatively new-statistical model, we are able to better model statistical property of wavelet coefficients. Within this framework, we describe a novel method for image denoising based on designing a MAP estimator, which relies on the mixture distributions with high local correlation. The simulation results show that our proposed technique achieves better performance than several published methods both visually and in terms of peak signal-to-noise ratio (PSNR)","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126561402","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
A Possibility of Applying Differential Digital Holography in Manufacturing Process 差分数字全息技术在制造过程中应用的可能性
Proceedings ELMAR 2006 Pub Date : 1900-01-01 DOI: 10.1109/ELMAR.2006.329525
K. Nenadić, I. Novak, J. Job, F. Jovic, Z. Jagnjic
{"title":"A Possibility of Applying Differential Digital Holography in Manufacturing Process","authors":"K. Nenadić, I. Novak, J. Job, F. Jovic, Z. Jagnjic","doi":"10.1109/ELMAR.2006.329525","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329525","url":null,"abstract":"This paper presents a method for detecting the small changes in image patterns applied on ceramic tiles using differential digital holography. Holograms are constructed from tile images using composition of spherical waves. One hologram is created from ceramic tile with correct pattern and the other hologram is created from tile with small error in pattern. The two holograms are subtracted and resulting hologram is observed. Next step in the process is creating image from subtracted holograms. The results show that for small change in the tile pattern there is a great alteration in the hologram and reconstructed image. The experiment is repeated with different tile errors in patterns","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132248602","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
Blind Beamforming Using Parallel Single-channel SPeech Enhancers 利用并行单通道语音增强器进行盲波束形成
Proceedings ELMAR 2006 Pub Date : 1900-01-01 DOI: 10.1109/ELMAR.2006.329530
B. Sallberg, N. Grbic, I. Claesson
{"title":"Blind Beamforming Using Parallel Single-channel SPeech Enhancers","authors":"B. Sallberg, N. Grbic, I. Claesson","doi":"10.1109/ELMAR.2006.329530","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329530","url":null,"abstract":"This paper presents an idea to extend a certain class of single channel speech enhancement algorithms to include the spatial domain. The resulting blind beamformer does not rely on a-priori knowledge of source and sensor positions and it enhances one or several speech sources based only on received data. The underlying principle in this approach is the fact that speech signals are short time stationary. Provided that the single channel speech enhancers attenuates unwanted sources and at the same time preserve the short time stationarity of speech signals, a summation of a small array of such single channel processors constitutes a coherent spatial speech enhancement. As opposed to traditional beamforming where the phase alteration is pre-specified, the phase alteration of the proposed structure is controlled by the received data. The evaluation uses a two microphone array and indicates that the signal to interference ratio is increased for a variety of source positions using the proposed method with only an insignificant decrease in speech quality","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122121550","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
Mobile User Positioning in GSM/UMTS Cellular Networks GSM/UMTS蜂窝网络中的移动用户定位
Proceedings ELMAR 2006 Pub Date : 1900-01-01 DOI: 10.1109/ELMAR.2006.329545
T. Kos, M. Grgic, G. Šišul
{"title":"Mobile User Positioning in GSM/UMTS Cellular Networks","authors":"T. Kos, M. Grgic, G. Šišul","doi":"10.1109/ELMAR.2006.329545","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329545","url":null,"abstract":"There has been increased interest in developing location services for wireless communications systems over the last several years. Mobile network operators are continuously investigating new innovative services that allow them to increase the profit. In the days to come, location based service or LBS will be benefiting both the consumers and network operators. While the consumers can expect greater personal safety and more personalised features, the network operators will tackle discrete market segments based on the different service portfolios. This paper analyses radiolocation methods applicable to GSM/UMTS mobile station location, and compares them with other positioning techniques used today, giving an insight into the convergence of satellite and cellular positioning","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124203761","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: 65
Wavelet Quasi-Superresolution in Marine Applications 小波准超分辨在海洋中的应用
Proceedings ELMAR 2006 Pub Date : 1900-01-01 DOI: 10.1109/ELMAR.2006.329516
I. Vujović, I. Kuzmanić
{"title":"Wavelet Quasi-Superresolution in Marine Applications","authors":"I. Vujović, I. Kuzmanić","doi":"10.1109/ELMAR.2006.329516","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329516","url":null,"abstract":"Possible marine applications of superresolution are in both military and civilian purposes, such as computer vision, target recognition, detection, identification, surveillance, synthetic aperture radar, etc. In this paper, a new algorithm for superresolution is proposed. The algorithm is based on wavelet theory and morphological structure of the image. Quasi-superresolution means usage of a single image for analysis instead of several. Wavelet quasi-superresolution can be applied with less complexity than standard superresolution, because wavelet interpolation of interlaced data and statistics of different images are skipped. New criterion for comparison of original and processed image is proposed. The result is single scalar which is easy to compare","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131046240","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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