2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)最新文献

A content-based digital image watermarking algorithm robust against JPEG compression 一种基于内容的抗JPEG压缩数字图像水印算法

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151601

Amir Najafi, Ali Siahkoohi, M. Shamsollahi

引用次数: 1

Audio bandwidth extension based on RBF neural network 基于RBF神经网络的音频带宽扩展

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151551

Haojie Liu, C. Bao, Xin Liu, Xingtao Zhang, Liyan Zhang

引用次数: 5

A fixed-point iterative schema for error minimization in k-sparse decomposition k-稀疏分解中误差最小化的不动点迭代模式

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151554

A. Adamo, G. Grossi

{"title":"A fixed-point iterative schema for error minimization in k-sparse decomposition","authors":"A. Adamo, G. Grossi","doi":"10.1109/ISSPIT.2011.6151554","DOIUrl":"https://doi.org/10.1109/ISSPIT.2011.6151554","url":null,"abstract":"Analogously to the well known greedy strategy called Orthogonal Matching Pursuit (OMP), we present a new algorithm to solve the sparse approximation problem over redundant dictionaries where the input signal is restricted to be a linear combination of k atoms or fewer from a fixed dictionary. The basic strategy of our method rests on a family of nonlinear mappings which results to be contractive in a interval close to zero. By iterating contractions and projections the method is able to extract the most significant components also for noisy signal which subsumes an ideal underlying signal having sufficiently sparse representation. For reasonable error level, the fixed point solution of such a iterative schema provides a sparse approximation containing only the nonzero terms characterizing the unique sparsest representation of the ideal noiseless sparse signal. The heuristic method so derived has been applied both to synthetic and real data. The former was generated by combining exact signals drawn by usual Bernoulli-Gaussian model and Gaussian noise; the later is taken by electrocardiogram (ECG) signals with application to the dictionary learning problem. In both cases the proposed method outperforms OMP method both regarding sparse approximation error and computation time.","PeriodicalId":288042,"journal":{"name":"2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616103","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: 12

Single channel speech/music segregation based on a novel K-means clustering schema 基于新颖k均值聚类模式的单通道语音/音乐分离

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151629

Seyed-Hossein Alavinia, F. Razzazi, H. Sadjedi

引用次数: 2

A graphical user interface watermarking technique for the copyright protection of colour images using colour watermarks 一种利用彩色水印对彩色图像进行版权保护的图形用户界面水印技术

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151587

A. Al-Gindy, Hana Younes, Amira Shaheen, Hala Elsadi

引用次数: 9

Vocal folds paralysis detection using an adapted block matching algorithm 基于自适应块匹配算法的声带麻痹检测

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151619

A. M. Zorrilla, Eneko Lopetegui Alba, B. G. Zapirain

引用次数: 0

Comparing different approaches for model parameters identification in short time 比较了短时间内模型参数辨识的不同方法

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151600

Linghan Li, B. Kanning, C. Schenck, B. Kuhfuss

引用次数: 0

Improving N-Finder technique for extracting endmembers 改进N-Finder端元提取技术

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151533

Mahmoud Maghrbay, R. Ammar, S. Rajasekaran

引用次数: 2

The effect of timing errors on frequency offset estimation in OFDM systems OFDM系统中定时误差对频偏估计的影响

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151560

S. Younis, A. Al-Dweik, C. Tsimenidis, B. Sharif, A. Hazmi

{"title":"The effect of timing errors on frequency offset estimation in OFDM systems","authors":"S. Younis, A. Al-Dweik, C. Tsimenidis, B. Sharif, A. Hazmi","doi":"10.1109/ISSPIT.2011.6151560","DOIUrl":"https://doi.org/10.1109/ISSPIT.2011.6151560","url":null,"abstract":"This work considers the effect of timing errors on the carrier frequency offset (CFO) estimation for orthogonal frequency division multiplexing (OFDM) systems. In general, most of the research conducted on OFDM systems assume that a wide range of timing errors can be tolerated due to the use of cyclic prefix (CP). Although such assumption might be valid for bit error rate (BER) analysis, it might not be the case for other processes such as CFO estimation. In this work, Monte Carlo simulations have been used to evaluate the effect of timing errors on the performance of several state-of-the-art CFO estimators for OFDM systems. The considered estimators include time domain, frequency domain, data-aided (DA) and blind estimators. Simulation results confirmed that particular CFO estimators, which are known to be highly accurate in perfect timing conditions, are very sensitive to timing offsets even if the offsets are within the inter-symbol-interference (ISI) free region of the CP. Other estimators offered high robustness for timing offsets in the entire range of the CP region. However, most of the considered estimators suffered from a severe performance degradation for timing errors out of the CP region.","PeriodicalId":288042,"journal":{"name":"2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130800201","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

Improving performance of Reed-Solomon decoder by error/erasure correction 通过纠错/擦除改进里德-所罗门解码器的性能

2011 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) Pub Date : 2011-12-14 DOI: 10.1109/ISSPIT.2011.6151556

Kyungsu Ko, Il-hyuk Oh, D. Ko, Byung Gi Jung

引用次数: 0