2010 5th International Symposium on Telecommunications最新文献_第7页

Security enhancement for TPVD steganographic method TPVD隐写方法的安全性增强

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734025

Nazanin Zaker, A. Hamzeh

引用次数: 2

New approaches to speech enhancement using phase correction in Wiener filtering 基于维纳滤波相位校正的语音增强新方法

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734149

P. Fardkhaleghi, M. Savoji

{"title":"New approaches to speech enhancement using phase correction in Wiener filtering","authors":"P. Fardkhaleghi, M. Savoji","doi":"10.1109/ISTEL.2010.5734149","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734149","url":null,"abstract":"Typical speech enhancement algorithms that operate in the Fourier domain only modify the magnitude component of the noisy speech. It is commonly understood that the phase component is perceptually unimportant, and thus, it is passed directly to the output. Nevertheless, it has been reported in recent experiments that the Short-Time Fourier Transform (STFT) phase spectrum contributes significantly to speech intelligibility. Motivated by this, we investigated the role of phase spectrum in speech enhancement using Wiener filtering and Martin's minimum statistics. In this paper we report on results obtained using optimization algorithms, for phase correction of each processed frame, that intend to match the waveform of the zero-phase Wiener filtered speech to the conventional filter output obtained with noisy phase characteristic. No a priori information on the original phase is assumed. We show that better results are achieved using phase correction for different noise types. Different criteria are used for optimization with results similar to the case when the actual clean speech phase is at hand. Almost as good results are also obtained when minimizing the Wiener filter impulse response dispersion. The achieved improvement is assessed through different measurements such as signal to noise ratio (SNR), Segmental signal to noise ratio, and Perceptual Estimation of Speech Quality (PESQ).","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128220836","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

A new hierarchical-clustering combination scheme based on scatter matrices and nearest neighbor criterion 一种基于散点矩阵和最近邻准则的分层聚类组合方案

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734151

Morteza Jalalat-evakilkandi, Abdolreza Mirzaei

{"title":"A new hierarchical-clustering combination scheme based on scatter matrices and nearest neighbor criterion","authors":"Morteza Jalalat-evakilkandi, Abdolreza Mirzaei","doi":"10.1109/ISTEL.2010.5734151","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734151","url":null,"abstract":"In the field of pattern recognition, combination of different classifiers is a common method to improve classification accuracy. Recently, tendency to improve the function of clustering methods, specifically partitional clustering methods, is being increased. Generally, hierarchical clustering is preferred to partitional clustering when the number of exact clusters is undetermined or when we are interested in finding the relation between clusters. Most of the proposed methods for clustering combination are based on partitional clustering. In this paper, a new method for combination of hierarchical clustering is proposed. In this method, in the first step the primary dendrograms of base hierarchical clustering methods (such as Single Linkage and Complete Linkage) are converted to matrices. Then these matrices are synthesized together in a weighted procedure and led to a final description matrix. The weights are determined based on two criteria: clustering scatter matrices and nearest neighbour of each pattern. The results show improvement in function of combination method rather than base clustering methods.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"625 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131623524","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

A compact microstrip slot antenna with novel E-shaped coupling aperture 一种新型e型耦合孔径微带槽天线

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734008

Omid Hoseini Izadi, Mandana Mehrparvar

引用次数: 23

Optimal power allocation to improve the performance of narrowband cooperative networks 优化功率分配以提高窄带合作网络的性能

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734068

B. Lashkari, M. Biguesh, Shapour Golbahar Haghighi

引用次数: 0

A study to find influential parameters on a Farsi-English statistical machine translation system 法英统计机器翻译系统中影响参数的研究

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734165

S. Bakhshaei, Shahram Khadivi, N. Riahi, H. Sameti

引用次数: 4

Performance analysis of nonuniform sampling based iterative equalizer for OFDM signals 基于非均匀采样的OFDM信号迭代均衡器性能分析

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734110

A. Rahmati, P. Azmi

引用次数: 1

Quorum-based pure directional neighbor discovery in self-organized ad hoc networks 自组织ad hoc网络中基于群体的纯定向邻居发现

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734073

Sina Khatibi, M. Dehghan, Mohammad Ali Poormina

{"title":"Quorum-based pure directional neighbor discovery in self-organized ad hoc networks","authors":"Sina Khatibi, M. Dehghan, Mohammad Ali Poormina","doi":"10.1109/ISTEL.2010.5734073","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734073","url":null,"abstract":"Neighbor discovery is vital for initialing and maintaining self-organized ad hoc networks. In order to exchange advertise messages and learn about each other presence, nodes have to aim their antennas toward each other when they are only utilized by directional antennas. Since ad hoc networks nodes have no former information about each other, neighbor discovery in directional ad hoc networks becomes more challenging. An asynchronous pure directional quorum-based neighbor discovery technique is proposed for the first time in this paper. Using quorum system for realizing the pure directional asynchronous and deterministic neighbor discovery is the novelty of this approach. All nodes are able to find all their potential neighbors in a relatively small time interval using proposed and transmission scenario and neighbor discovery. The independency of quorum based neighbor discovery to omnidirectional antennas during discovery process divides this approach from former related solutions. The suggested approach, by means of quorum system guarantees at least a common active interval for any two reciprocal beams during neighbor discovery procedure. The correctness of quorum based neighbor discovery in directional ad hoc network is discussed besides evaluating by series of simulations. This approach can be classified as fully directional handshake-based deterministic neighbor discovery algorithm.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128983930","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

Frequency-domain equalization for MIMO-OFDM over doubly selective channels 双选择信道上MIMO-OFDM的频域均衡

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734065

M. Beheshti, M. Omidi, A. Doost-Hoseini

引用次数: 5

Using Phase Space based processing to extract proper features for ASR systems 采用基于相空间的处理方法提取ASR系统的特征

2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734094

Y. Shekofteh, F. Almasganj

引用次数: 10