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2011 17th International Conference on Digital Signal Processing (DSP)最新文献

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Extended orthogonal space-time block coding scheme in asynchronous two-way cooperative relay networks over frequency-selective fading channels 基于频率选择衰落信道的异步双向协同中继网络中的扩展正交空时分组编码方案
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004933
F. T. Alotaibi, F. Abdurahman, Usama N. Mannai, J. Chambers
{"title":"Extended orthogonal space-time block coding scheme in asynchronous two-way cooperative relay networks over frequency-selective fading channels","authors":"F. T. Alotaibi, F. Abdurahman, Usama N. Mannai, J. Chambers","doi":"10.1109/ICDSP.2011.6004933","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004933","url":null,"abstract":"In this paper, we propose a new robust closed-loop extended orthogonal space-time block coding (EO-STBC) scheme for two-way four relay networks over frequency selective fading channels with imperfect synchronization. It is a three time slot scheme where the first one is specified for the two terminals while the other two are specified for amplify-and-forward (AF) relays. An orthogonal frequency division multiplexing (OFDM) data structure is employed at the two terminals using cyclic prefix (CP) insertion to combat the effect of multipaths and time asynchronicity. Full spatial diversity with array gain and code rate of 2 over 3 is achieved through applying a simple feedback approach over only two relays. Simulation results are used to show the performance improvements resulting from the proposed system. Furthermore, our scheme uses a simple symbol-wise maximum likelihood (ML) decoder to extract the information data.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115629170","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
Comparison of distributed space frequency block coding schemes in broadband multi-node cooperative relay networks with PAPR reduction 减少PAPR的宽带多节点协同中继网络中分布式空间频率分组编码方案的比较
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004949
Masoud Eddaghel, J. Chambers
{"title":"Comparison of distributed space frequency block coding schemes in broadband multi-node cooperative relay networks with PAPR reduction","authors":"Masoud Eddaghel, J. Chambers","doi":"10.1109/ICDSP.2011.6004949","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004949","url":null,"abstract":"Conventional open-loop space frequency block coding (SFBC) and closed-loop extended orthogonal (EO-SFBC) are compared for application in two and four relay cooperative broadband networks with reduced peak-to-average-power ratio (PAPR) signal transmission. The PAPR reduction is based on amplitude clipping at the source and an iterative amplitude reconstruction (IAR) decoding technique at the destination. The simulations of the proposed systems verify that the four relay cooperative transmitter diversity scheme with feedback and IAR decoding achieves a considerably improvement in bit error rate (BER) compared with the open-loop two relay cooperative transmitter with the same decoding technique, whilst limiting the source PAPR.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115653348","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
Joint DC coefficient band decoding and motion estimation in Wyner-Ziv video coding wner - ziv视频编码中DC系数带联合解码和运动估计
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004904
N. Deligiannis, M. Jacobs, J. Barbarien, Frederik Verbist, Jozef Skorupa, R. Van de Walle, A. Skodras, P. Schelkens, A. Munteanu
{"title":"Joint DC coefficient band decoding and motion estimation in Wyner-Ziv video coding","authors":"N. Deligiannis, M. Jacobs, J. Barbarien, Frederik Verbist, Jozef Skorupa, R. Van de Walle, A. Skodras, P. Schelkens, A. Munteanu","doi":"10.1109/ICDSP.2011.6004904","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004904","url":null,"abstract":"In contrast to traditional predictive coding, Wyner-Ziv video coding enables low-cost encoding architectures, in which the computationally expensive tasks for performing motion estimation are shifted to the decoder-side. In Wyner-Ziv video coding, side-information generation is a key aspect profoundly affecting the compression capacity of the system. This paper presents a novel technique which enables side-information refinement after DC coefficient band decoding in a transform-domain Wyner-Ziv video codec. The proposed side-information refinement approach performs overlapped block motion estimation and compensation, utilizing multi-hypothesis pixel-based prediction. The experimental results show that the presented Wyner-Ziv video codec incorporating the proposed technique yields significant and systematic compression gains of up to 23.22% with respect to the state-of-the-art DISCOVER codec.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115716955","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: 10
Statistical analysis of the impact of distortion (correction) on an automated classification of celiac disease 失真(校正)对乳糜泻自动分类影响的统计分析
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004900
M. Liedlgruber, A. Uhl, A. Vécsei
{"title":"Statistical analysis of the impact of distortion (correction) on an automated classification of celiac disease","authors":"M. Liedlgruber, A. Uhl, A. Vécsei","doi":"10.1109/ICDSP.2011.6004900","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004900","url":null,"abstract":"In this work we investigate the impact of barrel-type distortions and distortion correction on an automated classification of endoscopic imagery. For this purpose we use a set of methods from earlier work along with the nearest neighbor classifier on endoscopic images which are distorted in a barrel-type fashion. In addition we classify images after applying distortion correction to them.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123257449","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: 22
An enhanced EMD algorithm for ECG signal processing 一种用于心电信号处理的增强EMD算法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004922
Foteini Agrafioti, D. Hatzinakos
{"title":"An enhanced EMD algorithm for ECG signal processing","authors":"Foteini Agrafioti, D. Hatzinakos","doi":"10.1109/ICDSP.2011.6004922","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004922","url":null,"abstract":"The Empirical Mode Decomposition (EMD) is becoming increasingly popular for the multi-scale analysis of signals. However, the data-driven and adaptive nature of the EMD raises concerns regarding the uniqueness of the decomposition as well as the extend to which oscillatory modes can be mixed across different IMFs. This paper proposes a solution to this problem for the analysis of ECG signals. The bivariate extension of the decomposition (BEMD) is used as the basis of an analysis in which a synthetic ECG signal of idealized waveform guides the decomposition of an input ECG segment. Essentially, this work provides the necessary ground for the deployment of signal processing algorithms on the ECG signal using a more robust EMD analysis.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121660054","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
Study on visual discomfort induced by stimulus movement at fixed depth on stereoscopic displays using shutter glasses 基于快门眼镜的立体显示器固定深度刺激运动引起的视觉不适研究
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004995
Jing Li, M. Barkowsky, Junle Wang, P. Callet
{"title":"Study on visual discomfort induced by stimulus movement at fixed depth on stereoscopic displays using shutter glasses","authors":"Jing Li, M. Barkowsky, Junle Wang, P. Callet","doi":"10.1109/ICDSP.2011.6004995","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004995","url":null,"abstract":"Stereoscopic motion images are able to provide observers with realistic and immersive viewing experience. However, observers often experience visual discomfort during the viewing process. In this paper, we investigated the relationship between visual discomfort and the planar motion at different depth levels. The Paired Comparison method was used in the subjective experiments to allow for a precise measurement. The experimental results indicated that the relative angular disparity between foreground object and background played a more important role in determining the visual discomfort than the vergence-accommodation conflict. Furthermore, the results showed that with the increase of planar motion velocity, viewers might experience more visual discomfort. To quantify the effects of relative angular disparity and velocity on visual discomfort, two visual discomfort models were constructed. The preferred model was chosen based on the performance as well as the algorithmic complexity. This model can be used as an index for other related researches.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126129209","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: 33
Morphological road segmentation in urban areas from high resolution satellite images 基于高分辨率卫星图像的城市道路形态分割
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6005015
R. Gaetano, J. Zerubia, G. Scarpa, G. Poggi
{"title":"Morphological road segmentation in urban areas from high resolution satellite images","authors":"R. Gaetano, J. Zerubia, G. Scarpa, G. Poggi","doi":"10.1109/ICDSP.2011.6005015","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6005015","url":null,"abstract":"High resolution satellite images provided by the last generation sensors significantly increased the potential of almost all the image information mining (IIM) applications related to earth observation. This is especially true for the extraction of road information, task of primary interest for many remote sensing applications, which scope is more and more extended to complex urban scenarios thanks to the availability of highly detailed images. This context is particularly challenging due to such factors as the variability of road visual appearence and the occlusions from entities like trees, cars and shadows. On the other hand, the peculiar geometry and morphology of man-made structures, particularly relevant in urban areas, is enhanced in high resolution images, making this kind of information especially useful for road detection. In this work, we provide a new insight on the use of morphological image analysis for road extraction in complex urban scenarios, and propose a technique for road segmentation that only relies on this domain. The keypoint of the technique is the use of skeletons as powerful descriptors for road objects: the proposed method is based on an ad-hoc skeletonization procedure that enhances the linear structure of road segments, and extracts road objects by first detecting their skeletons and then associating each of them with a region of the image. Experimental results are presented on two different high resolution satellite images of urban areas.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126310749","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: 18
Psychomotor skills assessment in laparoscopic surgery using augmented reality scenarios 使用增强现实场景评估腹腔镜手术中的精神运动技能
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004893
V. Lahanas, Constantinos Loukas, N. Nikiteas, D. Dimitroulis, E. Georgiou
{"title":"Psychomotor skills assessment in laparoscopic surgery using augmented reality scenarios","authors":"V. Lahanas, Constantinos Loukas, N. Nikiteas, D. Dimitroulis, E. Georgiou","doi":"10.1109/ICDSP.2011.6004893","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004893","url":null,"abstract":"The aim of this paper was to investigate the potential role of augmented reality (AR) in the assessment of psychomotor skills in laparoscopic surgery. A basic AR task was developed using the ARToolkitPlus. The simulation models (virtual spheres) were embedded in a conventional laparoscopic box trainer. An ARToolkitPlus marker was attached to a laparoscopic instrument for extracting its trajectory. Two different groups were recruited to perform the task: novices and experts. Hidden Markov Models (HMMs) and Dynamic Time Warping (DTW) were used to evaluate the surgical maneuvers. The results show the strength of the proposed approach for proficiency assessment based on the quality of surgical maneuvers performed in the AR environment.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127214944","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
Color demosaicing with contour stencils 彩色去马赛克与轮廓模板
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004885
Pascal Getreuer
{"title":"Color demosaicing with contour stencils","authors":"Pascal Getreuer","doi":"10.1109/ICDSP.2011.6004885","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004885","url":null,"abstract":"Demosaicing is the problem where, given a color image that has been subsampled by a color filter array, to interpolate the complete color information at each pixel. Many demosaicing methods adapt the interpolation according to estimated edge orientations. However, while the accuracy of these orientations is important for success, they are difficult to estimate from the mosaiced image. This paper extends contour stencils, a method for estimating image contours based on total variation along curves, to estimating contour orientations directly on mosaiced images. A method for demosaicing using these contour orientation estimates is proposed and compared with existing methods. The proposed demosaicing is performed as an energy minimization, using a graph regularization adapted according to the orientation estimates.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124079315","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: 22
Predicting the perceived level of late reverberation using computational models of loudness 使用响度计算模型预测后期混响的感知水平
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004990
C. Uhle, Jouni Paulus, J. Herre
{"title":"Predicting the perceived level of late reverberation using computational models of loudness","authors":"C. Uhle, Jouni Paulus, J. Herre","doi":"10.1109/ICDSP.2011.6004990","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004990","url":null,"abstract":"It is well known that the perceived level of reverberation depends on both the input audio signal and the impulse response. This work aims at quantifying this observation and predicting the perceived level of late reverberation based on separate signal paths of direct and reverberant signals, as they appear in digital audio effects. A basic approach to the problem is developed and subsequently extended by considering the impact of the reverberation time on the prediction result. This leads to a linear regression model with two input variables which is able to predict the perceived level with high accuracy, as shown on experimental data derived from listening tests. Variations of this model with different degrees of sophistication and computational complexity are compared regarding their accuracy. Applications include the control of digital audio effects for automatic mixing of audio signals.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399600","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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