Pub Date : 2007-12-06DOI: 10.1109/PACKET.2007.4397040
I. E. Akkus, M. Civanlar, O. Ozkasap
A new peer-to-peer architecture for multipoint video conferencing is presented. It targets end points with low bandwidth network connections (single video in and out), allowing them to create a multipoint conference without any additional networking and computing resources than what is needed for a point-to-point conference. The new architecture is based on use of layered video coding with two layers at the end points. It allows each conference participant to see any other participant at any given time under all multipoint configurations of any number of users with a caveat that some participants may have to receive only the base layer video. Layered encoding approaches usable within this architecture are described. A protocol for implementation of the new approach has been developed and simulated. Its performance is analyzed
{"title":"Peer-to-Peer Multipoint Video Conferencing Using Layered Video","authors":"I. E. Akkus, M. Civanlar, O. Ozkasap","doi":"10.1109/PACKET.2007.4397040","DOIUrl":"https://doi.org/10.1109/PACKET.2007.4397040","url":null,"abstract":"A new peer-to-peer architecture for multipoint video conferencing is presented. It targets end points with low bandwidth network connections (single video in and out), allowing them to create a multipoint conference without any additional networking and computing resources than what is needed for a point-to-point conference. The new architecture is based on use of layered video coding with two layers at the end points. It allows each conference participant to see any other participant at any given time under all multipoint configurations of any number of users with a caveat that some participants may have to receive only the base layer video. Layered encoding approaches usable within this architecture are described. A protocol for implementation of the new approach has been developed and simulated. Its performance is analyzed","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132208310","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659854
M. Sayıt, T. Tunah
The new video coding standard H264 introduces two different kinds of switching frames, namely SP and SI frames. SP frames are proposed for switching among video streams while SI frames are proposed for error resilience. In this study, we stream H.264 coded video over the Internet in a quality adaptive fashion. Video is pre-encoded in two different rates with SP frames. Depending on network conditions, quality is adapted among two different streams. For error resilience, periodic insertion of I frames is preferred over SI frame retransmission since our path between client and server has large propagation delay. Two different GOP patterns are used to compare the use of SP frames as an alternative to I frames
{"title":"Video Streaming with H.264 Over the Internet","authors":"M. Sayıt, T. Tunah","doi":"10.1109/SIU.2006.1659854","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659854","url":null,"abstract":"The new video coding standard H264 introduces two different kinds of switching frames, namely SP and SI frames. SP frames are proposed for switching among video streams while SI frames are proposed for error resilience. In this study, we stream H.264 coded video over the Internet in a quality adaptive fashion. Video is pre-encoded in two different rates with SP frames. Depending on network conditions, quality is adapted among two different streams. For error resilience, periodic insertion of I frames is preferred over SI frame retransmission since our path between client and server has large propagation delay. Two different GOP patterns are used to compare the use of SP frames as an alternative to I frames","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"455 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123055861","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659810
E. Gunay, M. Alçı, F. Yildirim
In this paper, a realization of the cellular neural network (CNN) using current feedback operational amplifier (CFOA) is presented. The frequency performance of the proposed CFOA based CNN circuit is demonstrated by experimental simulations
{"title":"High Frequency Chaotic Oscillator Design via CFOA Based Cellular Neural Network","authors":"E. Gunay, M. Alçı, F. Yildirim","doi":"10.1109/SIU.2006.1659810","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659810","url":null,"abstract":"In this paper, a realization of the cellular neural network (CNN) using current feedback operational amplifier (CFOA) is presented. The frequency performance of the proposed CFOA based CNN circuit is demonstrated by experimental simulations","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116794398","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659926
F. Sari, N. Sari
In this paper, a generic and expandable rule-based fusion tool on a command control system is presented. The main objective of our fusion tool is to execute a generic, user-friendly information fusion process via a database using rules, which can be defined during run time
{"title":"Simulation Based Multisensor Data Fusion Tool","authors":"F. Sari, N. Sari","doi":"10.1109/SIU.2006.1659926","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659926","url":null,"abstract":"In this paper, a generic and expandable rule-based fusion tool on a command control system is presented. The main objective of our fusion tool is to execute a generic, user-friendly information fusion process via a database using rules, which can be defined during run time","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121105612","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659834
D.I. Tufekci, S. Karakas, O. Arikan
In the detection of the existence of the early gamma response, subjective methods have been used. In this study, an automated gamma detection technique is developed based on the features obtained from the time-frequency representation of the EEG signal in the gamma frequency band. The technique easily discriminates the gamma response existing and non-existing cases for the generated synthetic data. The classification of the technique and that of the expert opinion coincide %77 for real EEG data
{"title":"Detection of Gamma Responses in EEG Signals","authors":"D.I. Tufekci, S. Karakas, O. Arikan","doi":"10.1109/SIU.2006.1659834","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659834","url":null,"abstract":"In the detection of the existence of the early gamma response, subjective methods have been used. In this study, an automated gamma detection technique is developed based on the features obtained from the time-frequency representation of the EEG signal in the gamma frequency band. The technique easily discriminates the gamma response existing and non-existing cases for the generated synthetic data. The classification of the technique and that of the expert opinion coincide %77 for real EEG data","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121305327","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659925
M.E. Kayakesen, O. Yildiz, M. Efe
Applications of multi function phased array radars include but not limited to air surveillance, air traffic control and target tracking. Recent developments have made it possible to add IFF (identification friend or foe) capability to these radars. In this paper, simulation model of the IFF capability of an airborne multi function phased array radar is presented
{"title":"Modelling of IFF Capability of an Airborne Multi Function Phased Array Radars","authors":"M.E. Kayakesen, O. Yildiz, M. Efe","doi":"10.1109/SIU.2006.1659925","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659925","url":null,"abstract":"Applications of multi function phased array radars include but not limited to air surveillance, air traffic control and target tracking. Recent developments have made it possible to add IFF (identification friend or foe) capability to these radars. In this paper, simulation model of the IFF capability of an airborne multi function phased array radar is presented","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125051329","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659915
I. Yildirim, B. Demir, S. Erturk
A simple 3-dimensional (3-D) model construction technique using a line laser and a camera is presented in this work. By using the images captured under a controlled environment, showing the projection of the laser line onto the object surface, 3 dimensional graphical model and surface appearance are constructed for an object. A line laser, a digital camera and a turntable are used to constitute an image capture system. To construct more realistic models, a smaller turntable step size and a higher resolution camera should be used in the image capture system. In this work, the software required to construct the 3-D model from captured images of an object using an appropriate camera calibration technique has been implemented
{"title":"3-Dimensional Modelling and Visualization of Cultural Assets For E-Government","authors":"I. Yildirim, B. Demir, S. Erturk","doi":"10.1109/SIU.2006.1659915","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659915","url":null,"abstract":"A simple 3-dimensional (3-D) model construction technique using a line laser and a camera is presented in this work. By using the images captured under a controlled environment, showing the projection of the laser line onto the object surface, 3 dimensional graphical model and surface appearance are constructed for an object. A line laser, a digital camera and a turntable are used to constitute an image capture system. To construct more realistic models, a smaller turntable step size and a higher resolution camera should be used in the image capture system. In this work, the software required to construct the 3-D model from captured images of an object using an appropriate camera calibration technique has been implemented","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125826076","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659803
F. Asvaroğlu, E. Ince
In this paper, a hybrid technique for the purpose of digital watermarking is proposed. The proposed technique combines two state of the art methods in order to gain robustness against compression and general affine transformations such as rotation and scaling. The paper also provides simulation results using grayscale and color images in order to demonstrate the applicability of the proposed new hybrid technique
{"title":"RSC Robust Hybrid Watermarking Technique","authors":"F. Asvaroğlu, E. Ince","doi":"10.1109/SIU.2006.1659803","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659803","url":null,"abstract":"In this paper, a hybrid technique for the purpose of digital watermarking is proposed. The proposed technique combines two state of the art methods in order to gain robustness against compression and general affine transformations such as rotation and scaling. The paper also provides simulation results using grayscale and color images in order to demonstrate the applicability of the proposed new hybrid technique","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123280369","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659895
A. Sahin, S. Kumar
We demonstrate a novel technique for suppressing the optical beat noise (OBN) which is key limitation in multiple access optical communication networks such as OCDMA. Using cross gain modulation induced amplitude mapping function (XGM-AMF) we drastically reduce the power penalty due to OBN. We experimentally show that dynamic power range for interference is improved by as large as 10-dB for a 1-dB power penalty limit compared to conventional photodetection techniques
我们展示了一种新的技术来抑制光拍噪声(OBN)，这是多址光通信网络(如OCDMA)的关键限制。采用交叉增益调制诱导振幅映射函数(XGM-AMF)，大大降低了OBN带来的功率损失。我们的实验表明，与传统的光探测技术相比，在1 db的功率惩罚限制下，干扰的动态功率范围提高了10 db
{"title":"Optical Beat Noise Mitigation via Cross Gain Modulation","authors":"A. Sahin, S. Kumar","doi":"10.1109/SIU.2006.1659895","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659895","url":null,"abstract":"We demonstrate a novel technique for suppressing the optical beat noise (OBN) which is key limitation in multiple access optical communication networks such as OCDMA. Using cross gain modulation induced amplitude mapping function (XGM-AMF) we drastically reduce the power penalty due to OBN. We experimentally show that dynamic power range for interference is improved by as large as 10-dB for a 1-dB power penalty limit compared to conventional photodetection techniques","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"395 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125473301","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}
Pub Date : 2006-04-17DOI: 10.1109/SIU.2006.1659928
E. Caglav, H. Ilk
One of the fundamental functions of the radar systems is weapon control. (The weapon terminology stands for any asset in the tactical environment like a fighter jet, bomber, etc) Recent aircrafts are equipped with their onboard radars. These radars have narrow viewing area and short range compared to the surveillance radar systems. Due to these shortcomings of the weapon radars or some malfunctions, weapons require guidance assistance from the surveillance radar systems. There are three weapon control schemes which are "close", "loose" and "broadcast" control. This paper discusses the intercept geometries which are associated with "close control" hence other control types are beyond the scope of this paper. Close control intercept geometries are calculated in a manner to guide the weapon to a specified location or a moving target. When a change in the target kinematics occurs the calculated geometry becomes invalid and therefore geometry calculations have to be refreshed at every radar update. Four attack options for the intercept geometries are realized: Cutoff, Pursuit, Stern and Stern Conversion. These attack options result in different types of geometries and the implementation of these geometries and error analysis of the implementation constitute the scope of this paper
{"title":"Calculation of the Intercept Geometries for Engagement","authors":"E. Caglav, H. Ilk","doi":"10.1109/SIU.2006.1659928","DOIUrl":"https://doi.org/10.1109/SIU.2006.1659928","url":null,"abstract":"One of the fundamental functions of the radar systems is weapon control. (The weapon terminology stands for any asset in the tactical environment like a fighter jet, bomber, etc) Recent aircrafts are equipped with their onboard radars. These radars have narrow viewing area and short range compared to the surveillance radar systems. Due to these shortcomings of the weapon radars or some malfunctions, weapons require guidance assistance from the surveillance radar systems. There are three weapon control schemes which are \"close\", \"loose\" and \"broadcast\" control. This paper discusses the intercept geometries which are associated with \"close control\" hence other control types are beyond the scope of this paper. Close control intercept geometries are calculated in a manner to guide the weapon to a specified location or a moving target. When a change in the target kinematics occurs the calculated geometry becomes invalid and therefore geometry calculations have to be refreshed at every radar update. Four attack options for the intercept geometries are realized: Cutoff, Pursuit, Stern and Stern Conversion. These attack options result in different types of geometries and the implementation of these geometries and error analysis of the implementation constitute the scope of this paper","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122911966","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}
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