2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04.最新文献_第7页

Robust digital image watermarking method against RST attacks 抗RST攻击的鲁棒数字图像水印方法

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458508

Lian Cai, S. Du

引用次数: 5

Neuro-fuzzy estimator of speech quality 语音质量的神经模糊估计

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458528

G. Chen, V. Parsa

引用次数: 1

Interactions between the autonomic and central nervous system during the first slow-sleep cycle 自主神经系统和中枢神经系统在第一个慢睡眠周期中的相互作用

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458503

Y. Sriveni, R. Grebe, F. Wallois

引用次数: 0

Harmonic wavelet transform signal decomposition and modified group delay for improved Wigner-Ville distribution 谐波小波变换信号分解与改进Wigner-Ville分布的修正群延迟

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458417

S. Narasimhan, B. Kumar

引用次数: 4

Reliable and robust transmission and storage of medical images with patient information 具有患者信息的医学图像的可靠、稳健的传输和存储

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458363

Usha R. Acharya, P. Bhat, M. S. Kumar, C. M. Lim

{"title":"Reliable and robust transmission and storage of medical images with patient information","authors":"Usha R. Acharya, P. Bhat, M. S. Kumar, C. M. Lim","doi":"10.1109/SPCOM.2004.1458363","DOIUrl":"https://doi.org/10.1109/SPCOM.2004.1458363","url":null,"abstract":"A new method for compact storage and transmission of medical images with concealed patient information in noisy environment is evinced. Digital watermarking is the technique adapted here for interleaving patient information with medical images. The patient information, which comprises of text data and signal graph, is encrypted to prevent unauthorized access of data. The latest encryption algorithm (Rijndael) is used for encrypting the text information. Signal graphs (ECG, EEG EMG etc.) are compressed using DPCM technique. To enhance the robustness of the embedded information, the patient information is coded by error correcting codes (ECC) such as (7,4) Hamming, Bose-Chaudhuri-Hocquenghem (BCH) and Reed Solomon (RS) codes .The noisy scenario is simulated by adding salt and pepper (S&P) noise to the embedded image. For different signal to noise ratio (SNR) of the image, bit error rate (BER) and number of character altered (NOCA) for text data and percentage distortion (PDIST) for the signal graph are evaluated. The performance comparison based on the above parameters is conducted for three types of ECC. It is elicited that coded systems can perform better than the uncoded systems.","PeriodicalId":424981,"journal":{"name":"2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04.","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127581062","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: 100

Design of two-channel perfect reconstruction filter bank with specified LPF magnitude frequency response 给定LPF幅值频率响应的双通道完美重构滤波器组设计

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458366

L.W. Wilkinson, A. Bopardikar, R. Rao

引用次数: 1

Subcarrier allocation schemes for multiuser OFDM systems 多用户OFDM系统的子载波分配方案

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458518

A. Pandharipande, M. Kountouris, Ho Yang, Hyoung-Woon Park

引用次数: 20

Performance analysis of digital phase locked loops with statistical filters for carrier synchronisation 带统计滤波器的数字锁相环载波同步性能分析

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458380

S. Kandeepan, S. Reisenfield

引用次数: 6

A new method of frame synchronization and frequency offset estimation in OFDM system OFDM系统中帧同步与频偏估计的一种新方法

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458359

C. Nanda Kishore, V. Reddy

{"title":"A new method of frame synchronization and frequency offset estimation in OFDM system","authors":"C. Nanda Kishore, V. Reddy","doi":"10.1109/SPCOM.2004.1458359","DOIUrl":"https://doi.org/10.1109/SPCOM.2004.1458359","url":null,"abstract":"In an orthogonal frequency-division multiplexing system, symbol synchronization and frequency offset estimation are very crucial for maintaining the orthogonality of the sub-carriers. Among the several recently proposed methods for frame/symbol synchronization, the technique suggested in T. M. Schmidl et. al. (1997) is robust to channel phase and frequency offset. The timing metric proposed in T. M. Schmidl et. al. (1997) reaches a plateau which, in the presence of noise and frequency-selective channel, can give rise to some ambiguity in the start of the frame. In this paper, for the same preamble as in T. M. Schmidl et. al. (1997), we propose a new timing metric, and considering an ideal scenario we show that it yields a sharp peak at the correct symbol boundary. We then analyze the metric and evaluate its mean at the symbol boundary and in its neighborhood for the case of AWGN and frequency-selective channels. The mean values predicted by the analysis are close to those obtained from simulations. Since the derivation of variance expression is tedious, we used simulations to evaluate this at the corresponding time instants. From the results of mean and standard deviation, it is clear that the proposed metric yields sharp peak at the symbol boundary.","PeriodicalId":424981,"journal":{"name":"2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04.","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133358094","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

Ant colony optimization based model for network zero-configuration 基于蚁群优化的网络零配置模型

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI: 10.1109/SPCOM.2004.1458494

S. Ring, V. Munirajan, E. Cole

{"title":"Ant colony optimization based model for network zero-configuration","authors":"S. Ring, V. Munirajan, E. Cole","doi":"10.1109/SPCOM.2004.1458494","DOIUrl":"https://doi.org/10.1109/SPCOM.2004.1458494","url":null,"abstract":"Today's networks are becoming increasingly dynamic in their configuration and less dependent on centralized services. Naturally these networks rely on common TCP/IP protocols such as DNS, DHCP, MADCAP and LDAP, which in turn require an administrative staff which may not be feasible always. For increasingly popular ad-hoc and small home networks, the technical knowledge of end-users is open limited and administrative skill can be lacking. In a world where networks are beginning to connect not only computer users of varying technical skill but also a huge variety of personal digital devices the end-user can't always be expected to have the time, desire, or knowledge to configure their network. Thus automatic network configuration has become an inevitable facility to have and more so on distributed networks. The Zero-Configuration Committee on the IETF has addressed this issue and issued various standards. In this paper we work for achieving many of the functionalities of Zero-Configuration for large scale networks, using Ant Colony Optimization techniques. Ant Colony Optimization achieves large scale control of distributed entities (where centralized supports are scarce) using simple cooperating and coordinating entities. Simulations were run to demonstrate Ant Colony Optimization based algorithms for achieving zero-configuration.","PeriodicalId":424981,"journal":{"name":"2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04.","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133482033","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