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Sharma S.,Electronics and Communication Engineering | Kumar R.,SSIET | Vijay R.,Banasthali University
Proceedings on 2015 1st International Conference on Next Generation Computing Technologies, NGCT 2015 | Year: 2015

A semi-circular slot antenna is proposed that has the ability to switch the frequency to ten different bands, one at a time, between the wide frequency range of 5.35 GHz and 9.36 GHz. To achieve frequency re-configurability, switching of eight RF p-i-n diodes which are placed along the slot length is done in various combinations. Frequency tuning ratio of about 1.751 can be achieved using this design. Results such as return losses, gain, bandwidth and radiation patterns are presented in this paper. © 2015 IEEE. Source


Mishra R.,Dr. C.V. Raman University | Singhai S.K.,Government Engg College | Sharma M.,SSIET
Proceedings - International Conference on Electronic Systems, Signal Processing, and Computing Technologies, ICESC 2014 | Year: 2014

Various methods of automatic shot boundary detection have been proposed and claimed to perform reliably. Although the detection of edits is fundamental to any kind of video analysis since it segments a video into its basic components, the shots, only few comparative investigations on early shot boundary detection algorithms have been published. A vast number of proposed techniques exist for shot boundary detection but the major criticisms to them are their inefficiency and lack of reliability. The reliability of the scene change detection stage is a very significant requirement because it is the first stage in any video retrieval system. This paper gives a comparative study of Block Matching Algorithm (BMA) and Complex Wavelet Transform (CWT) algorithm. BMA uses motion vectors to detect shot transition in videos and CWT uses edges of the objects, are invariant to illumination changes. The algorithm performance is measured in terms of hit rate, number of false hits, and miss rate for hard cuts, fades, and dissolves over a large and diverse set of video sequences. © 2014 IEEE. Source


Mishra R.,University of Kota | Singhai S.K.,Government Engg College | Sharma M.,SSIET
Proceedings of the 2013 3rd IEEE International Advance Computing Conference, IACC 2013 | Year: 2013

Many algorithms have been proposed for detecting video shot boundaries and classifying shot and shot transition types. This paper presents a novel approach to processing encoded video sequences prior to complete decoding. Detection of gradual transition and the elimination of disturbances caused by illumination change or fast object and camera motion are the major challenges to the current shot boundary detection techniques. These disturbances are often mistaken as shot boundaries. Therefore, it is a challenging task to develop a method that is not only insensitive to various disturbances but also sensitive enough to capture a shot change. To address these challenges, we propose an algorithm for shot boundary detection in the presence of illumination change, fast object motion, and fast camera motion. This is important for accurate and robust detection of shot boundaries and in turn critical for high-level content based analysis of video. First, the propose algorithm extracts structure features from each video frame by using dual-tree complex wavelet transform. Then, spatial domain structure similarity is computed between adjacent frames. The declaration of shot boundaries are decided based on carefully chosen thresholds. Experimental study is performed on a number of videos that include significant illumination change and fast motion of camera and objects. The performance comparison of the proposed algorithm with other existing techniques validates its effectiveness in terms of better Recall & Precision. © 2013 IEEE. Source


Gupta A.,SDD Institute of Engineering | Kaler R.S.,Thapar University | Singh H.,SSIET
Optik | Year: 2013

In this paper, the performance of proposed optical burst assembly technique is experimentally investigated under self-similar traffic and traditional scheduling techniques to find the optimal combination of burst assembly and burst scheduling techniques for superior performance of the optical burst switched (OBS) networks. The performance of the newly introduced variable time burst assembly (VT-BA) technique is evaluated in terms of packet loss rate, traffic sent, end to end delay and burst loss rate. Simulation results reveal that the proposed burst assembly algorithm performs well amid various scheduling techniques but CTBR (constant time burst resequencing) and Min-SV (minimum starting void) scheduler gives better compatibility with VT-BA as compared to their other counterparts for most of the parameters under consideration. It is observed that the above combination dramatically decreases the overall burst loss rate while keeping the end-to-end delay in a feasible range. © 2012 Elsevier GmbH. Source


Gupta A.,SDD Institute of Engineering | Kaler R.S.,Thapar University | Singh H.,SSIET
Optik | Year: 2013

A key problem in OBS networks is the assignment of wavelengths to incoming bursts, i.e. the scheduling of bursts. In this paper, we propose an efficient scheduling technique: Modified Latest Available Unused Channel with Void Filling (MLAUC-VF) which efficiently utilizes the voids created by previously scheduled bursts, resulting in high bandwidth utilization. Simulation results demonstrate that the scheduling time of the MLAUC-VF algorithm is superior than existing scheduling algorithms, thus improving the most imperative burst drop ratio and packet loss rate parameters. © 2012 Elsevier GmbH. Source

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