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2006 International Symposium on Intelligent Signal Processing and Communications最新文献

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A high capacity watermarking for H.264/AVC based on frequency weighting 基于频率加权的H.264/AVC高容量水印
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364786
Jun-Yan Hsieh, Long-Wen Chang
{"title":"A high capacity watermarking for H.264/AVC based on frequency weighting","authors":"Jun-Yan Hsieh, Long-Wen Chang","doi":"10.1109/ISPACS.2006.364786","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364786","url":null,"abstract":"A low complexity watermarking method in the compressed domain for H.264 is proposed. It embeds the watermark in a quantized 4times4 coding block. Because DC coefficient affects the quality of video very much, we just modify the remaining 15 AC coefficients for embedding the watermark. We divide the AC coefficients in the embeddable block into two groups. The coding block is embeddable if the watermark embedding function of the coefficients in these two groups is greater than a threshold. It is embeddable. The block is embedded with 1 or 0 according to the weighting functions of these two groups. The proposed method has higher capacity and could resist basic recompression attack by mean of comparing other algorithms. The experiment result shows the proposed method could maintain video quality.","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128462057","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: 6
Texture Simplification in 3D Maps for Visualization at Low Resolution 纹理简化在3D地图可视化在低分辨率
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364827
I. R. Khan, M. Okuda
{"title":"Texture Simplification in 3D Maps for Visualization at Low Resolution","authors":"I. R. Khan, M. Okuda","doi":"10.1109/ISPACS.2006.364827","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364827","url":null,"abstract":"Three-dimensional (3D) urban models, come with huge data size, mainly consisting of the information of geometry and the texture, and the simplification of both is often needed for efficient streaming, rendering and visualization. In this paper, we present different techniques for simplification of different types of the texture images in 3D urban maps, aiming at their visualization on low resolution screens, such as those of the cell phones. We sort the images into two different classes based on their certain features, and develop suitable simplification techniques for each class. The simplified images preserve the main features and have significantly smaller size as compared to the originals","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129333832","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
Evaluation of base station diversity system for reliable multicast delivery 基站分集系统的可靠组播传输评估
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364904
K. Naito
{"title":"Evaluation of base station diversity system for reliable multicast delivery","authors":"K. Naito","doi":"10.1109/ISPACS.2006.364904","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364904","url":null,"abstract":"This paper proposes the reliable multicast delivery system with a base station diversity technique for the cellular system. Previous studies of reliable multicast methods considered a single wireless link communication. Moreover a received signal intensity declines as the distance from a base station becomes long in the cellular network. Therefore the low received signal intensity causes many transmission errors in the cell boundary area. Furthermore, the multi-path fading causes the dynamic fluctuation of the received signal intensity. The phenomenon also deteriorates the transmission error performance. On the contrary, the feature of the proposed system is to examine the use of multiple wireless links and to improve the transmission performance. Each wireless terminal communicates with some neighbor base stations, and combines the frame information from different base stations. Numerical results demonstrate that the proposed system can achieve the multicast data delivery with a smaller amount of cellular wireless resources and with the shorter transmission period","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129125761","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
A Consideration on the multi-dimensional topology in Self-Organizing Maps 关于自组织映射中多维拓扑的思考
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364772
Kikuo Fujimura, Kazuhiro Masuda, Yutaka Fukui
{"title":"A Consideration on the multi-dimensional topology in Self-Organizing Maps","authors":"Kikuo Fujimura, Kazuhiro Masuda, Yutaka Fukui","doi":"10.1109/ISPACS.2006.364772","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364772","url":null,"abstract":"The 1-dimensional topological network (line) and 2-dimensional topological network (2D-plane) of self-organizing Maps are well used for many applications. We propose the 3-dimensional topological self-organizing maps and give suggestion of an ability of more higher dimensional Maps. Since a compression ratio becomes low by 3-dimensional SOM as compared with 2-dimensional SOM, it may be able to leave more information on the original data. Research of 3- dimensional SOM is not popular. The main reasons are 1) The topology of units has various patterns and 2) The general-purpose topology which can be used in common with many data sets is not established. The data visualization technique of having been suitable for 3-dimensional SOM is proposed in this paper.","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"320 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116292894","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
Joint Flexible Macroblock Ordering and FEC Coding for H.264 Wireless Video Transmission H.264无线视频传输的联合柔性宏块排序和FEC编码
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364853
S. Aramvith, W. Hantanong
{"title":"Joint Flexible Macroblock Ordering and FEC Coding for H.264 Wireless Video Transmission","authors":"S. Aramvith, W. Hantanong","doi":"10.1109/ISPACS.2006.364853","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364853","url":null,"abstract":"\"Flexible macroblock ordering\" is the macroblock-level error resilience tool defined in H.264 video coding standard for wireless video transmission. Nevertheless the issue of how to suitably arrange the macroblock in suitable mapping is yet to clarified and investigated. This paper addresses this issue and proposes the use of the encoder's macroblock coded-bit-count information as an indicator for a choice of macroblock-address-map of each picture. This proposed mapping is jointly used with forward error correction (FEC) coding. Simulation results under the scenarios of slow and fast fading channels verify the proposed technique help reduce the number of undecodable macroblocks of up to 86%. The works would improve the effectiveness of wireless video transmission","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126389051","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
Digital VLSI Implementation of a Moving Object Detection Algorithm Based on Neuronal Propagation in the Hippocampus 基于海马神经元繁殖的运动目标检测算法的数字VLSI实现
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364731
Haichao Liang, Hiroyuki Nakayama, Takashi Morie, H. Hayashi
{"title":"Digital VLSI Implementation of a Moving Object Detection Algorithm Based on Neuronal Propagation in the Hippocampus","authors":"Haichao Liang, Hiroyuki Nakayama, Takashi Morie, H. Hayashi","doi":"10.1109/ISPACS.2006.364731","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364731","url":null,"abstract":"In this paper, we propose a moving object detection algorithm for the advanced driver assistance system (ADAS) and its digital VLSI implementation. The algorithm is based on parallel processing inspired by neuronal propagation underlying sequence coding in a model of the hippocampus. We have implemented this algorithm on an FPGA, and have verified the desired operation: detection of the velocity and direction of moving objects at real time","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128152868","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: 2
A Novel Implementation of the IEEE802.11 Medium Access Control IEEE802.11介质访问控制的一种新实现
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364704
S. Samadi, A. Golomohammadi, A. Jannesari, M. R. Movahedi, B. Khalaj, S. Ghammanghami
{"title":"A Novel Implementation of the IEEE802.11 Medium Access Control","authors":"S. Samadi, A. Golomohammadi, A. Jannesari, M. R. Movahedi, B. Khalaj, S. Ghammanghami","doi":"10.1109/ISPACS.2006.364704","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364704","url":null,"abstract":"This work presents some new optimization approaches to implementation of medium access control (MAC) layer of IEEE 802.11 wireless networking protocol using general purpose DSP and gate array systems. Optimization starts at design level. The hardware/software partitioning of the MAC's architecture is optimized in the sense of minimal implementation burden, while maintaining the system's functionalities and performance. The proposed partitioning and implementation technique obviates the use of any real time operating system (RTOS), which leads to a simple, high speed, and low memory structure of the MAC's software. Also, solutions such as using hash tables and pipeline processing are given and employed to gain a higher speed. The software section is implemented on the popular, low price DSP of TI's C54 processor, whereas the hardware implementation is realized using Virtex2vp30 from Xilinx","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134133430","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: 9
A Novel Compensation Method of Nonlinear Distortions in OFDM System 一种新的OFDM系统非线性失真补偿方法
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364738
Jing Yang, X. Mu, Shou-yi Yang, Lin Qi
{"title":"A Novel Compensation Method of Nonlinear Distortions in OFDM System","authors":"Jing Yang, X. Mu, Shou-yi Yang, Lin Qi","doi":"10.1109/ISPACS.2006.364738","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364738","url":null,"abstract":"In recent years, there has been increasing interest in OFDM (orthogonal frequency division multiplexing) applying to the mobile communication system in terms of considering its various advantages in combating the severe effects of the frequency selective fading. However, the OFDM system suffers from the strong sensitivity to the nonlinear distortion, introduced by the transmitting high power amplifier (HPA), since the OFDM system has the high peak-to-average power ratio (PAPR). Based on the analyzation of some classic nonlinear compensation methods, we propose a new approach to compensate the nonlinearity in this paper. Its performance is verified through computer simulations. Specifically, the enhanced performance in terms of the bit error rate (BER) is documented for the traveling wave tube (TWT) HPA model.","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131494814","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 High Speed Video/Audio Stream Splitter for 4K Digital-Cinema 一种用于4K数字影院的高速视频/音频流分配器
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364770
H. Takahashi, T. Murooka, K. Toyoshima, H. Uematsu, T. Fujii
{"title":"A High Speed Video/Audio Stream Splitter for 4K Digital-Cinema","authors":"H. Takahashi, T. Murooka, K. Toyoshima, H. Uematsu, T. Fujii","doi":"10.1109/ISPACS.2006.364770","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364770","url":null,"abstract":"This paper develops the requirements of a high speed video stream splitting device and introduces a suitable architecture. The device can generate ten streams from a 500 Mbps 4K-digital-cinema stream without any loss. 1,000 receiving clients can be supported by connecting the devices in a multistage manner. It will be a key device in achieving a digital-cinema-based theater network and creating a new cinema distribution environment. The prototype of the device is implemented and the basic performance is evaluated by experiments. The evaluation results clearly show that the device satisfies the requirements","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131173907","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: 2
3-D Separable-Denominator Digital Filters with Minimum L2-Sensitivity and No Overflow Oscillations 具有最小l2灵敏度和无溢出振荡的三维可分分母数字滤波器
2006 International Symposium on Intelligent Signal Processing and Communications Pub Date : 2006-12-01 DOI: 10.1109/ISPACS.2006.364754
T. Hinamoto, O. I. Omoifo
{"title":"3-D Separable-Denominator Digital Filters with Minimum L2-Sensitivity and No Overflow Oscillations","authors":"T. Hinamoto, O. I. Omoifo","doi":"10.1109/ISPACS.2006.364754","DOIUrl":"https://doi.org/10.1109/ISPACS.2006.364754","url":null,"abstract":"The problem of minimizing an L2-sensitivity measure subject to L2-norm dynamic-range scaling constraints for three-dimensional (3-D) separable-denominator digital filters is formulated. The constrained optimization problem is converted into an unconstrained optimization problem by using linear-algebraic techniques. Next, an efficient quasi-Newton algorithm is applied with closed-form formula for gradient evaluation to solve the unconstrained optimization problem. The optimal filter structure is then constructed by employing the resulting coordinate transformation matrix that minimizes the L2-sensitivity measure subject to the scaling constraints. A numerical example is presented to illustrate the utility of the proposed technique","PeriodicalId":178644,"journal":{"name":"2006 International Symposium on Intelligent Signal Processing and Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127816510","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
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