Pub Date : 2008-12-16DOI: 10.1109/ICCT.2008.4716180
Yu Lu, Zhaoyang Zhang, Zhi Liu, Xuli Shi
This paper proposed a novel approach to segment objects from the H.264 compressed video with moving background. At first, the noisy motion vectors are eliminated from the motion field by vector median filtering. Then the predicted motion field reconstructed by backward estimation is used to accumulate the motion field, which is followed by global motion compensation. After that, the hypothesis testing is used for initial region classification. Finally, the graph cuts technique is applied to partition objects by minimizing the energy function formulated by the model of Markov Random Field. The experimental results demonstrate efficient performance and good segmentation quality of the proposed method.
{"title":"Object segmentation using Graph Cuts for the H.264 compressed video with moving background","authors":"Yu Lu, Zhaoyang Zhang, Zhi Liu, Xuli Shi","doi":"10.1109/ICCT.2008.4716180","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716180","url":null,"abstract":"This paper proposed a novel approach to segment objects from the H.264 compressed video with moving background. At first, the noisy motion vectors are eliminated from the motion field by vector median filtering. Then the predicted motion field reconstructed by backward estimation is used to accumulate the motion field, which is followed by global motion compensation. After that, the hypothesis testing is used for initial region classification. Finally, the graph cuts technique is applied to partition objects by minimizing the energy function formulated by the model of Markov Random Field. The experimental results demonstrate efficient performance and good segmentation quality of the proposed method.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122295378","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716165
Zhang Ping
Summary form only given. This paper introduces the developments of TDD based Giga bits per second (Gbps) wireless communication system in wireless technology innovation (WTI) institute of BUPT. Radio link transmission design are presented in this paper, including promising key techniques of physical layer such as Channel measurement and modeling, multiple input multiple output (MIMO), low density parity check (LDPC) code, channel estimation and PAPR suppression etc., and MAC layer design such as access network architecture and scheduling. Link-level simulations prove the advantages of the design.
{"title":"Keynote Address IV Gbps wireless communication system","authors":"Zhang Ping","doi":"10.1109/ICCT.2008.4716165","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716165","url":null,"abstract":"Summary form only given. This paper introduces the developments of TDD based Giga bits per second (Gbps) wireless communication system in wireless technology innovation (WTI) institute of BUPT. Radio link transmission design are presented in this paper, including promising key techniques of physical layer such as Channel measurement and modeling, multiple input multiple output (MIMO), low density parity check (LDPC) code, channel estimation and PAPR suppression etc., and MAC layer design such as access network architecture and scheduling. Link-level simulations prove the advantages of the design.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"2006 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127640248","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716128
Muqing Wu, Qinjuan Zhang
In the current routing mechanism for Mobile Ad hoc Networks, service differentiation is not realized completely, resulting in resources wastage for best-effort (BE) traffic and deficiency for real-time traffic, such as voice and video. A novel service differentiated multi-path routing mechanism is proposed, in which service differentiation is realized in network layer based on multi-path routing. Multiple paths found in the route discovery procedure are evaluated, sorted and chosen according to the packet service type. Simulations show that the resource requirement of real-time traffic is better satisfied and the overall performance is improved effectively, that is, the end-to-end delay is decreased and the packet delivery ratio is increased evidently.
{"title":"Service differentiated multi-path routing mechanism for MANET","authors":"Muqing Wu, Qinjuan Zhang","doi":"10.1109/ICCT.2008.4716128","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716128","url":null,"abstract":"In the current routing mechanism for Mobile Ad hoc Networks, service differentiation is not realized completely, resulting in resources wastage for best-effort (BE) traffic and deficiency for real-time traffic, such as voice and video. A novel service differentiated multi-path routing mechanism is proposed, in which service differentiation is realized in network layer based on multi-path routing. Multiple paths found in the route discovery procedure are evaluated, sorted and chosen according to the packet service type. Simulations show that the resource requirement of real-time traffic is better satisfied and the overall performance is improved effectively, that is, the end-to-end delay is decreased and the packet delivery ratio is increased evidently.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818401","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716269
C. Pomsuwan, P. Phadungkul
This paper presents the automatic optical power and extinction ratio control of 4.25 Gbps optical transceiver to optimize optical transmitting eye diagrams over operating temperature range. Optical eye diagrams are adjusted an optical power and extinction ratio over temperature following to quadratic equation and linear equation respectively which are calculated from the fitting curves of optical power and extinction ratio acquisition as the optical eye diagrams are optimized. The optimized eye diagrams are considered by zero hit mask margin test compliant with Fibre Channel standards.
{"title":"Notice of RetractionAutomatic optical power and extinction ratio control of 4.25Gbps optical transceiver","authors":"C. Pomsuwan, P. Phadungkul","doi":"10.1109/ICCT.2008.4716269","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716269","url":null,"abstract":"This paper presents the automatic optical power and extinction ratio control of 4.25 Gbps optical transceiver to optimize optical transmitting eye diagrams over operating temperature range. Optical eye diagrams are adjusted an optical power and extinction ratio over temperature following to quadratic equation and linear equation respectively which are calculated from the fitting curves of optical power and extinction ratio acquisition as the optical eye diagrams are optimized. The optimized eye diagrams are considered by zero hit mask margin test compliant with Fibre Channel standards.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129078273","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716210
Tianding Chen
It utilizes back-propagation neural network (BPNN) as the recognition system tool. The identification is done by the back propagation neural network (BPNN). Moreover, we improve BPNN some limitation, such as slow learning speed in the training process, leading to partial minimum values that are difficult to converge, and the need to retrain an enormous volume of data whenever new training samples are added or deleted. The technologies and related models used for recognizing the license plates are clearly described and given to demonstrate the effectiveness of the proposed model. Experimental results show that our system can effectively recognize most license plates character, including 10 numbers and 26 alphabet characters. The recognition rate is 90%.
{"title":"Notice of RetractionA scheme of improved training in license plate character recognition","authors":"Tianding Chen","doi":"10.1109/ICCT.2008.4716210","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716210","url":null,"abstract":"It utilizes back-propagation neural network (BPNN) as the recognition system tool. The identification is done by the back propagation neural network (BPNN). Moreover, we improve BPNN some limitation, such as slow learning speed in the training process, leading to partial minimum values that are difficult to converge, and the need to retrain an enormous volume of data whenever new training samples are added or deleted. The technologies and related models used for recognizing the license plates are clearly described and given to demonstrate the effectiveness of the proposed model. Experimental results show that our system can effectively recognize most license plates character, including 10 numbers and 26 alphabet characters. The recognition rate is 90%.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127334584","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716287
Shunlan Liu, Jian-Hong Hu, M. Dai
In this work, we present two new blind equalization schemes suitable for transmitting cross cross-QAM signals. Based on the framework of constant cross algorithm (CXA), a modified CXA (MCXA) is obtained by adding a constellation-matched error (CME) term to the cost function of the CXA. For the MCXA, the CXA term provides global convergence and the CME term helps to decrease the residual error and accelerate convergence. Furthermore, we propose a decision-directed version of the MCXA, called DD-MCXA, which can improves the performance of the MCXA. Preserving the good initial convergence characteristics of the CXA, the DD-MCXA automatically decreases the effect of the CXA errors when the equalizer is near convergence. Both simulation and analysis demonstrate the good performance of the proposed schemes.
{"title":"New blind equalization schemes based on constant cross algorithm","authors":"Shunlan Liu, Jian-Hong Hu, M. Dai","doi":"10.1109/ICCT.2008.4716287","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716287","url":null,"abstract":"In this work, we present two new blind equalization schemes suitable for transmitting cross cross-QAM signals. Based on the framework of constant cross algorithm (CXA), a modified CXA (MCXA) is obtained by adding a constellation-matched error (CME) term to the cost function of the CXA. For the MCXA, the CXA term provides global convergence and the CME term helps to decrease the residual error and accelerate convergence. Furthermore, we propose a decision-directed version of the MCXA, called DD-MCXA, which can improves the performance of the MCXA. Preserving the good initial convergence characteristics of the CXA, the DD-MCXA automatically decreases the effect of the CXA errors when the equalizer is near convergence. Both simulation and analysis demonstrate the good performance of the proposed schemes.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133533075","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716215
Feng Yun-fei, L. Jianping
Symbol mapping is very crucial for the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID). In this paper, a new scheme of symbol mapping called Cross-8PSK-Quasi-Gray is proposed. The optimization scheme of Cross-8PSK is composed of two QPSK with different radius and phases. Through analysis and comparisons with three previously mentioned symbol mappings in terms of channel capacity and error performance, simulation results show that Cross-8PSK-Quasi-Gray mapping significantly outperforms set partitioning, semi set partitioning labeling maps in the aspects of both channel capacity and error performance. The overall performance of Cross-8PSK-Quasi-Gray mapping is nearly close to gray mapping in conventional 8PSK. Thus, Cross-8PSK-Quasi-Gray mapping is a good scheme for designing the power-efficient BICM.
{"title":"Optimized symbol mapping for bit-interleaved coded modulation with iterative decoding","authors":"Feng Yun-fei, L. Jianping","doi":"10.1109/ICCT.2008.4716215","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716215","url":null,"abstract":"Symbol mapping is very crucial for the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID). In this paper, a new scheme of symbol mapping called Cross-8PSK-Quasi-Gray is proposed. The optimization scheme of Cross-8PSK is composed of two QPSK with different radius and phases. Through analysis and comparisons with three previously mentioned symbol mappings in terms of channel capacity and error performance, simulation results show that Cross-8PSK-Quasi-Gray mapping significantly outperforms set partitioning, semi set partitioning labeling maps in the aspects of both channel capacity and error performance. The overall performance of Cross-8PSK-Quasi-Gray mapping is nearly close to gray mapping in conventional 8PSK. Thus, Cross-8PSK-Quasi-Gray mapping is a good scheme for designing the power-efficient BICM.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"2022 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131729674","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716256
Xiaohui Hu, Ji-zhong Shen
Much attention has been paid to dynamic circuit in current low power design. Since the BiCMOS circuit has advantages of both the CMOS circuit and the TTL circuit, it has gained more and more application. In this paper, a new structure and the design method at switch level of the binary dynamic BiCMOS circuit has been proposed based on an n-type BiCMOS dynamic circuit. The circuits designed following this method have shown advantages not only in heavy integration density, low power, high speed and large load drive capability, but also in simple structure and low design complexity. PSpice simulation has proved that these circuits have correct logic function, high running speed and low power consumption.
{"title":"The structure of dynamic BiCMOS circuit and its switch-level design","authors":"Xiaohui Hu, Ji-zhong Shen","doi":"10.1109/ICCT.2008.4716256","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716256","url":null,"abstract":"Much attention has been paid to dynamic circuit in current low power design. Since the BiCMOS circuit has advantages of both the CMOS circuit and the TTL circuit, it has gained more and more application. In this paper, a new structure and the design method at switch level of the binary dynamic BiCMOS circuit has been proposed based on an n-type BiCMOS dynamic circuit. The circuits designed following this method have shown advantages not only in heavy integration density, low power, high speed and large load drive capability, but also in simple structure and low design complexity. PSpice simulation has proved that these circuits have correct logic function, high running speed and low power consumption.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134314180","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716281
Lv Qingfei, Liu Gang
An improved laser-controlled land leveling system is discussed with the purpose of designing the system effectively and low-cost. The system is composed of three parts. A laser emitter can produce slopes. A laser receiver can receive the laser beam and filter the noisy light, and its incepting diameter is extended to about 400 m. A controller can process the altitude signals and control the hydraulic system for the leveling scraper. Many experiments have been done in different places, and the standard deviation of relative height is close to 2 cm after leveling. Experiments have shown that the system is effective and steady, and the cost is obviously decreased.
{"title":"Research on an improved laser-controlled land leveling system","authors":"Lv Qingfei, Liu Gang","doi":"10.1109/ICCT.2008.4716281","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716281","url":null,"abstract":"An improved laser-controlled land leveling system is discussed with the purpose of designing the system effectively and low-cost. The system is composed of three parts. A laser emitter can produce slopes. A laser receiver can receive the laser beam and filter the noisy light, and its incepting diameter is extended to about 400 m. A controller can process the altitude signals and control the hydraulic system for the leveling scraper. Many experiments have been done in different places, and the standard deviation of relative height is close to 2 cm after leveling. Experiments have shown that the system is effective and steady, and the cost is obviously decreased.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132194003","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716196
Wei Wei-min, Wang Shuozhong, Tan ZhenJun
Re-sampled signals show periodicity in its nth derivative and covariance, and it can be used to estimate the scaling ratio. Calculate the second-order difference along the vertical (horizontal) direction of image. Compute the mean of absolute difference along the horizontal (vertical) direction and obtain a vector, which will be appended with zero to make its length equal to an integer power of 2. Calculate DFT to the vector and produce the frequency-magnitude curve. Detect the peak frequency in the curve and obtain the scaling ratio along the horizontal (vertical) direction. It is applicable to different interpolation schemes, no matter whether the image has been JPEG compressed before or after interpolation. Experimental results show that the proposed method can judge whether or not a photo captured by the digital camera is undergone the digital zoom, and approximately estimate the scaling ratio.
{"title":"Notice of RetractionEstimation of rescaling factor and detection of image splicing","authors":"Wei Wei-min, Wang Shuozhong, Tan ZhenJun","doi":"10.1109/ICCT.2008.4716196","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716196","url":null,"abstract":"Re-sampled signals show periodicity in its nth derivative and covariance, and it can be used to estimate the scaling ratio. Calculate the second-order difference along the vertical (horizontal) direction of image. Compute the mean of absolute difference along the horizontal (vertical) direction and obtain a vector, which will be appended with zero to make its length equal to an integer power of 2. Calculate DFT to the vector and produce the frequency-magnitude curve. Detect the peak frequency in the curve and obtain the scaling ratio along the horizontal (vertical) direction. It is applicable to different interpolation schemes, no matter whether the image has been JPEG compressed before or after interpolation. Experimental results show that the proposed method can judge whether or not a photo captured by the digital camera is undergone the digital zoom, and approximately estimate the scaling ratio.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128913332","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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