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2006 Annual IEEE India Conference最新文献

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Adaptive Localized Curve Tracing Methodology for Efficient Transmission of Audio Streams over Noisy ATM Networks 噪声ATM网络音频流高效传输的自适应局部曲线跟踪方法
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302834
Prasanna Kannan, R.pravin Kumar
{"title":"Adaptive Localized Curve Tracing Methodology for Efficient Transmission of Audio Streams over Noisy ATM Networks","authors":"Prasanna Kannan, R.pravin Kumar","doi":"10.1109/INDCON.2006.302834","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302834","url":null,"abstract":"To combat channel impairments during transmission of high fidelity audio streams over noisy ATM networks in addition to providing security and high compression to the audio data have been challenging tasks for the researchers in the field. This paper proposes a multi functionality model employed at the transmitting end that provides the advantages of multi level compression, error recovery mechanism and the security for the audio data in ATM networks. The proposed model introduces the modulo coefficient booster transform (MCBT) that translates the relevant frequency domain coefficients of the audio stream filtered from a human acoustic modeler into strictly increasing/decreasing booster coefficients (employing coefficient localization, burrow wheeler transform and mathematical curve tracing). The booster coefficients obtained are fit to corresponding modulo mathematical functions, which are encoded and transmitted after incorporating security and error recovery mechanisms. Employing the PRATM model to provide error recovery for the transmitted data in the noisy channel provides reliability to the data. The proposed transform can be completely invertible (being a function of set lapse time and error deviation threshold) and provides additional security by means of localizations of the functions generated based on hamming distance computations. The model was tested for various bit error rates of high fidelity audio streams simulated in noisy network environments. The PSNRs , security and the overall reliability of the proposed model encourage the model to be preferred for transmissions of audio streams over noisy ATM networks","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121480720","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
New Silicon Carbide (SiC) Hetero-Junction Darlington Transistor 新型碳化硅异质结达灵顿晶体管
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302824
M.J. Kumar, A. Sharma
{"title":"New Silicon Carbide (SiC) Hetero-Junction Darlington Transistor","authors":"M.J. Kumar, A. Sharma","doi":"10.1109/INDCON.2006.302824","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302824","url":null,"abstract":"Basic SiC bipolar transistors have been studied in the past for their applications where high power or high temperature operation is required. However since the current gain in SiC bipolar transistors is very low and therefore, a large base drive is required in high current applications. Therefore, it is important to enhance the current gain of SiC bipolar transistors. Using two dimensional mixed mode device and circuit simulation, for the first time, we report a new Darlington transistor formed using two polytypes 3C-SiC and 4H-SiC having a very high current gain as a result of the heterojunction formation between the emitter and the base of transistor. The reasons for the improved performance are analyzed","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123986506","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
A Wavelet Transform Based Digital Image Watermarking and Authentication 基于小波变换的数字图像水印与认证
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302855
N. Krishnan, R. Selvakumar, S. Rajapandian, K. Arul Mozhi, C. Nelson Kennedy Babu
{"title":"A Wavelet Transform Based Digital Image Watermarking and Authentication","authors":"N. Krishnan, R. Selvakumar, S. Rajapandian, K. Arul Mozhi, C. Nelson Kennedy Babu","doi":"10.1109/INDCON.2006.302855","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302855","url":null,"abstract":"The techniques for watermarking of digital images are available to prevent unauthorized distribution of multimedia data image. In this paper, a watermarking scheme is proposed in which the image is decomposed in to wavelet coefficients and a visual recognizable logo and content based watermark information is embedded in the wavelet coefficients. The wavelet coefficients corresponding to the points located in a neighborhood that have maximum entropy are used for embedding the visual logo and the relations between the neighboring coefficients in the selected wavelet sub bands are embedded into middle frequency pairs of the first scale coefficients. This method embeds the maximum amount of watermark while the watermark is imperceptible. This technique provides two levels of protection while maintaining the image quality. The embedding of relation coefficients provide the capability to identify malicious changes made on the image. The experimental results confirm that the proposed techniques provide secure watermarking and robust to a variety of attacks","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125535290","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: 17
Impact of SPM on Dispersion Compensated DPSK Transmission Link under Tight Optical Filtering 紧光滤波下SPM对色散补偿DPSK传输链路的影响
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302807
S. Gupta, R. Gangopadhyay, G. Prati
{"title":"Impact of SPM on Dispersion Compensated DPSK Transmission Link under Tight Optical Filtering","authors":"S. Gupta, R. Gangopadhyay, G. Prati","doi":"10.1109/INDCON.2006.302807","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302807","url":null,"abstract":"The tolerance against self-phase modulation (SPM) of three differential phase-shift keying (DPSK) modulation schemes viz. conventional DPSK (CDPSK), symmetrical DPSK (SDPSK) and pi/4-DPSK in a 40-Gb/s multi-span dispersion compensated single-mode fiber (SMF) link is studied through detailed numerical simulation. The study takes into account the influence of pulse duty-ratio, tight optical filtering, in-line amplifier noise and the impact of delay mismatch in the delay-demodulation receiver while comparing the variants of DPSK systems. The numerical analysis clearly suggests the need for smaller duty ratio for all DPSK formats under tight optical filtering for achieving minimum eye-opening penalty (EOP) due to SPM. Return-to-zero (RZ)-CDPSK exhibits the highest tolerance towards the SPM induced penalty in noisy and noiseless situation whereas SDPSK shows more robustness to the uncertainty in the interferometer delay mismatch","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131121625","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
An Application of Multi Wavelets in Wireless Communication In The Presence Of Frequency Selective Fading 多小波在频率选择性衰落无线通信中的应用
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302836
S. Sengar, S. Joshi, S. Prasad
{"title":"An Application of Multi Wavelets in Wireless Communication In The Presence Of Frequency Selective Fading","authors":"S. Sengar, S. Joshi, S. Prasad","doi":"10.1109/INDCON.2006.302836","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302836","url":null,"abstract":"Multi wavelet multiplexing is a signal transmission technique in which the message symbols are coded onto the multiplicity `R' wavelet basis functions for transmission. The proposed transmission scheme comes under the class of orthogonally multiplexed communication. The use of multiplicity `R' wavelet basis functions enhances the data transmission rate. On the other hand, the property of orthogonality enables the design of a simple correlation receiver. The use of `L' scale multiplicity `R' multi-wavelet multiplexing along with matched filtering at the receiver effectively converts a frequency selective fading channel into `RL' flat fading channels. We have examined the performance of this multiplexing scheme from a rate-diversity trade-off point of view. Further, a simple channel estimation technique for lower data rates has been proposed","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122313912","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
Medical Image Denoising using X-lets 基于x -let的医学图像去噪
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302763
L. Parthiban, R. Subramanian
{"title":"Medical Image Denoising using X-lets","authors":"L. Parthiban, R. Subramanian","doi":"10.1109/INDCON.2006.302763","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302763","url":null,"abstract":"Wavelets are proved to be well adapted for 1-D signal but can only capture limited directional information in 2D due to its poor orientation selectivity. Transforms like curvelets and contourlets have very high degree of directional specificity which is necessary for medical images. These transforms are based on certain anisotropic scaling principle which is quite different from the isotropic scaling of wavelets. Simulation test carried out on medical images like ultrasound images, magnetic resonance images and computerized tomography scan images, show that better denoising results were obtained by curvelets and contourlets, than with wavelets, in terms of mean square error, signal to noise ratio and visual evaluation","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120963824","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: 16
Log Gabor Wavelet and Maximum a Posteriori Estimator in Speaker Identification 对数Gabor小波和极大后验估计在说话人识别中的应用
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302757
S. Senapati, S. Chakroborty, G. Saha
{"title":"Log Gabor Wavelet and Maximum a Posteriori Estimator in Speaker Identification","authors":"S. Senapati, S. Chakroborty, G. Saha","doi":"10.1109/INDCON.2006.302757","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302757","url":null,"abstract":"Speaker identification (SI) system needs an efficient feature extraction process and an appropriate speaker model developed from these features. The work introduces the fusion of log Gabor wavelet (LGW) and maximum a posteriori (MAP) estimator for robust text-independent SI system. The focus of this paper is on the robustness to degradations produced by transmission over a telephone channel. Complete experimental framework is conducted on 49 speakers, conversational telephone King-92 SI speech database with two well known speaker models i.e. Gaussian mixture model (GMM) and vector quantization (VQ). Comparisons are made with two different established methods as well as with normal feature extraction procedure to show the robustness of the new approach in different time segments. The GMM attains 98.8% of identification accuracy using 30 second of wide band speech utterances and 87.3% of identification accuracy using 30 second of narrow band speech utterances and is shown to outperform the other methods","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127988755","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
Towards Adaptive e-learning: Technological Challenges and Enabling Technologies 迈向适应性电子学习:技术挑战和使能技术
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302838
A. Zafar, N. Ahmad
{"title":"Towards Adaptive e-learning: Technological Challenges and Enabling Technologies","authors":"A. Zafar, N. Ahmad","doi":"10.1109/INDCON.2006.302838","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302838","url":null,"abstract":"The growing number of E-learning programmes and parallel developments in the field of information and communication technology (ICT) has put forth many technological options to both the learner and instructor communities. The advent and popularization of ubiquitous computing and mobile devices have redefined the concept of E-learning by providing learners with variety of options to interact with E-learning system while at the same time compelled the course designers to choose the appropriate technology among plethora of available technologies for knowledge representation, storage and distribution. This paper outlines technological research challenges and explores the available technologies suitable for employment for performing various activities related to E-learning","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133782066","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
Wavelength routed shared buffer based feed-forward architectures for optical packet switching 基于波长路由共享缓冲区的光分组交换前馈结构
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302783
R.K. Singh, R. Srivastava, V. Mangal, Y. N. Singh
{"title":"Wavelength routed shared buffer based feed-forward architectures for optical packet switching","authors":"R.K. Singh, R. Srivastava, V. Mangal, Y. N. Singh","doi":"10.1109/INDCON.2006.302783","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302783","url":null,"abstract":"Several techniques for optical buffering have been given in past and still a lot of research is being done. Also, the rapid growth of the broadband communication has placed extreme demands upon the telecommunication infrastructure. This has generated an urgent requirement to introduce new technologies. Wavelength division multiplexing (WDM) is one of those techniques, which allows simultaneous propagation of large number of channels at higher data rates in a single fiber. In this paper, we are proposing three architectures for optical packet switching by utilizing wavelength routed shared buffer more efficiently. Buffering technique used in this paper is a new approach towards WDM application in optical domain. These three architectures are made by three different combinations of space switch and arrayed waveguide grating (AWG). The results for the loss probability and average delay are obtained by simulation","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128494979","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
Design of High-Speed-Pipelined Execution Unit of 32-bit RISC Processor 32位RISC处理器高速流水线执行单元的设计
2006 Annual IEEE India Conference Pub Date : 2006-09-01 DOI: 10.1109/INDCON.2006.302780
S. Islam, D. Chattopadhyay, M. Kumar Das, V. Neelima, S. Sarkar
{"title":"Design of High-Speed-Pipelined Execution Unit of 32-bit RISC Processor","authors":"S. Islam, D. Chattopadhyay, M. Kumar Das, V. Neelima, S. Sarkar","doi":"10.1109/INDCON.2006.302780","DOIUrl":"https://doi.org/10.1109/INDCON.2006.302780","url":null,"abstract":"The paper describes the architecture and design of the pipelined execution unit of a 32-bit RISC processor. Organization of the blocks in different stages of pipeline is done in such a way that pipeline can be clocked at high frequency. Control and forward of `data flow' among the stages are taken care by dedicated hardware logic. Different blocks of the execution unit and dependency among themselves are explained in details with the help of relevant block diagrams. The design has been modeled in verilog HDL and functional verification policies adopted for it have been described thoroughly. Synthesis of the design is carried out at 0.13-micron standard cell technology and for slow timing library the reported frequency of operation is 714 MHz at synthesis level","PeriodicalId":122715,"journal":{"name":"2006 Annual IEEE India Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131722299","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: 14
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