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IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.最新文献

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Interactive multimedia & intelligent broadband - key to telecom revival 交互式多媒体和智能宽带是电信复兴的关键
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412440
B. Juang
{"title":"Interactive multimedia & intelligent broadband - key to telecom revival","authors":"B. Juang","doi":"10.1109/ISCIT.2004.1412440","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412440","url":null,"abstract":"","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121090870","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
Dual block simultaneous search for fast hierarchical motion estimation 双块同步搜索快速分层运动估计
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413813
T. Yamada, H. Aoki, M. Ikekawa, I. Kuroda
{"title":"Dual block simultaneous search for fast hierarchical motion estimation","authors":"T. Yamada, H. Aoki, M. Ikekawa, I. Kuroda","doi":"10.1109/ISCIT.2004.1413813","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413813","url":null,"abstract":"The paper presents a fast algorithm for 2-layer hierarchical motion estimation suitable to software video encoders. Reduction of computational complexity has been achieved by estimating motion in the lower resolution layer for two-macroblock sets, as opposed to estimating it separately for each individual macroblock. This results in faster motion estimation with only negligible degradation in video quality. Degradation in PSNR was only 0.1 dB at 4 Mbps for MPEG-2, and computational complexity was reduced by 40% as compared with conventional 2-layer estimation. It also makes it possible to improve PSNR by 0.9 dB with only 30% greater computational complexity, as compared with a conventional three step search algorithm.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116137746","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
Performance evaluation of backoff algorithm with release delays for slotted ALOHA systems 带释放延迟的开槽ALOHA系统退退算法性能评价
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412906
K. Sakakibara, M. Sasaki, J. Yamakita
{"title":"Performance evaluation of backoff algorithm with release delays for slotted ALOHA systems","authors":"K. Sakakibara, M. Sasaki, J. Yamakita","doi":"10.1109/ISCIT.2004.1412906","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412906","url":null,"abstract":"We propose a new backoff algorithm which incorporates release delay in addition to backoff delay. In the proposed algorithm the backoff counter of a successful user is gradually decreased. The rate of the decrement is controlled by the release delay. The performance of the proposed algorithm is analyzed by means of the equilibrium point analysis in terms of throughput and delay characteristics. Numerical results show that the proposed algorithm can significantly improve the performance by properly choosing the parameters.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121033588","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
Eye detection and tracking in video streams 视频流中的眼球检测和跟踪
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413921
A. Fathi, M. T. Manzuri
{"title":"Eye detection and tracking in video streams","authors":"A. Fathi, M. T. Manzuri","doi":"10.1109/ISCIT.2004.1413921","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413921","url":null,"abstract":"This work presents a new method for eye detection in a sequence of video pictures. We first find the face region using the features of skin color, then the location of eye is determined by applying three cues on the detected face region. The first cue is the eye intensity and color, because the intensity of each eye region is relatively low and its color differs from the color of surrounding skin. The second cue is based on the position and size of eyes. The third cue is based on the convolution of the proposed eye-variance-filter with the eye-window candidates. After finding the precise location of the eye, it is tracked in a finite search window. We have evaluated and tested the presented system using different frame streams, and the results are encouraging.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116737956","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
A data processing method for the switch fabric of communication systems 一种通信系统交换结构的数据处理方法
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413847
N. Matsuura, M. Aoki, S. Urushidani, T. Kawamura, N. Kukutsu, T. Sakamoto
{"title":"A data processing method for the switch fabric of communication systems","authors":"N. Matsuura, M. Aoki, S. Urushidani, T. Kawamura, N. Kukutsu, T. Sakamoto","doi":"10.1109/ISCIT.2004.1413847","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413847","url":null,"abstract":"This work proposes a data processing method suitable for mapping packet-based traffic into TDM (time division multiplexing) time slots. Packets in a data stream are mapped separately into discrete tributaries, according to their destinations. Thus this method enables TDM switches to be used in the switch fabric of routers, leading to a new architecture for communication systems.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"838 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113982321","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
Pilot aided timing synchronization for SC-FDE and OFDM: a comparison SC-FDE和OFDM的导频辅助定时同步:比较
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412921
S. Reinhardt, R. Weigel
{"title":"Pilot aided timing synchronization for SC-FDE and OFDM: a comparison","authors":"S. Reinhardt, R. Weigel","doi":"10.1109/ISCIT.2004.1412921","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412921","url":null,"abstract":"This paper deals with the pilot aided synchronization techniques for single carrier systems with frequency domain equalization (SC/FDE). This techniques are also useable for OFDM. Normally the following parameters have to be synchronized for a mobile communication system: carrier frequency and phase, clock frequency and phase and the position within a transmitted frame. In mobile communication systems, where multipath propagation occurs, a channel estimation and equalization is additionally necessary. In SC/FDE systems a very efficient, low complexity equalizer is implemented, that furthermore synchronizes the clock and carrier phase automatically. That is an important advantage of SC/FDE versus OFDM. The most critical point in burst communication systems is the frame detection and timing synchronization. This paper compares different techniques for timing synchronization and carrier frequency offset estimation.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131196432","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
A vectorial analysis of UHF propagation in a multislit street waveguide 多狭缝街道波导中超高频传播的矢量分析
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412877
Edgar Silva Jtinior, Arantes Carrijo
{"title":"A vectorial analysis of UHF propagation in a multislit street waveguide","authors":"Edgar Silva Jtinior, Arantes Carrijo","doi":"10.1109/ISCIT.2004.1412877","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412877","url":null,"abstract":"In this work we present a vectorial analysis of the two-ray model, as well a vectorial analysis of the whole street waveguide model in the UHF band. For both, an ideal dipole is assumed to be the transmitting aerial. For the two-ray model, parallel polarization is investigated and a comparison between the approximated analysis (only algebraic sum of the fields) and non-approximated analysis (considering dipole gain and vectorial analysis) is provided. For the street model, the street is modeled as a multislit waveguide, and horizontal polarization is investigated. As in the two-ray model, a comparison between the approximated and non-approximated analysis is provided.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131207620","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
Low voltage wide band inverting current feedback amplifier 低电压宽带反相电流反馈放大器
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412900
S. Wisetphanichkij, K. Dejhan
{"title":"Low voltage wide band inverting current feedback amplifier","authors":"S. Wisetphanichkij, K. Dejhan","doi":"10.1109/ISCIT.2004.1412900","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412900","url":null,"abstract":"The paper proposes a new design of low voltage wide band inverting current feedback amplifier. With the simple and small circuit, we obtain a high frequency response up to 2.5 GHz, with high gain and large input/output dynamic range up to /spl plusmn/0.5 V for /spl plusmn/0.7 V supply voltage. Simulation was performed with MOSIS 0.5 micron technology and resulted in an excellent performance, stable over a large ambient temperature range. This circuit also performs well in digital application and is suitable for mixed-signal processing.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131446478","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
Wavelet theoretic properties of the family of 6/10 biorthogonal filters 6/10双正交滤波器族的小波理论性质
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413880
D. Tay, S. Marusic, G. Deng, M. Palaniswami
{"title":"Wavelet theoretic properties of the family of 6/10 biorthogonal filters","authors":"D. Tay, S. Marusic, G. Deng, M. Palaniswami","doi":"10.1109/ISCIT.2004.1413880","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413880","url":null,"abstract":"The family of biorthogonal filters considered here are of lengths 6 and 10 and represent a superset of the 6/10 pair introduced by Villasenor et al. (1995). The filters have a fixed number of vanishing moments that are structurally imposed and possess two degrees of freedom for varying (tuning) the filter characteristics. A study of the wavelet theoretic properties of the these filters is presented here. Properties such as convergence of the two-scale equation, Sobolev regularity measure, Riesz bounds and the projection cosine of the approximation subspaces are evaluated.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"409 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517482","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
Low-voltage pipelined ADC using class-AB pseudo-differential OTA 采用ab类伪差分OTA的低压流水线ADC
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412464
W. Chaloenlarp, A. Thanachayanont
{"title":"Low-voltage pipelined ADC using class-AB pseudo-differential OTA","authors":"W. Chaloenlarp, A. Thanachayanont","doi":"10.1109/ISCIT.2004.1412464","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412464","url":null,"abstract":"This paper describes the design of a low-voltage low-power pipelined analog-to-digital converter using a new class-AB pseudo-differential operational transconductance amplifier (OTA). The class-AB OTA employed in this work makes use of partial positive feedback to enhance its transconductance, which allows large gain-bandwidth product with low power dissipation. A 6 bit 15.36 MS/s pipelined ADC has been designed using a 0.35 /spl mu/m CMOS process. Simulation results show that the ADC can achieve a maximum DNL and INL of 0.5 LSB and 0.59 LSB, respectively, and an SFDR of 47.5 dB, while draining 2.8 mA from a 2 V supply voltage.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"19 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114084715","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
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