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Audio-Video Synchronous Coding Based on Mode Selection in H.264

Audio-Video Synchronous Coding Based on Mode Selection in H....

2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： Hexin Chen Xiaoyin Qi Xiaoni Li Dazhong Wang School of Communication Engineering Jilin University Changchun China Department of Computer System Tampere University of Technology Tampere Finland

An embedded audio-video synchronous coding scheme based on mode selection is proposed in the paper. In H.264, many mode types are employed to conduct inter prediction for determining the best one to achieve good coding efficiency. In the paper, the audio information is embedded into video stream by modulating the best mode in inter prediction, and then synchronous coding is applied to the mixing video and audio. The modulation is based on the cost function and mapping rules between the mode types and the audio bits. We have verified the proposed scheme based on H.264/AVC using JM 11.0 and evaluated it by four objective indicators: the video quality, the embedded cost, the change of bit-rate and the change of total encoding time. The experimental results show that this scheme has achieved synchronous coding between audio and video with small influence on the above four objective indicators.

关键词： synchronous coding inter mode selection H.264/A VC audio and video

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A new technique to reproduced High-Dynamic-Range images for Low-Dynamic-Range display

A new technique to reproduced High-Dynamic-Range images for ...

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IEEE International Conference on Signal and Image Processing Applications (ICSIPA)

作者： Tung Li Qian Suhaidi Shafie M. Iqbal Saripan Department of Electrical and Electronic Engineering Universiti Putra Malaysia Serdang Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Malaysia

Tone mapping is a process for reproduction of High-Dynamic-Range images (HDR) for Low-Dynamic-Range (LDR) output devices. In this report, author presents a new local tone-mapping operator, derived from the Contrast Limited Adaptive histogram Equalization (CLAHE) technique for displaying high dynamic range image. The CLAHE is a method which was originally developed for medical imaging. This method has effectively expanded the full dynamic range of display and it is fully automatic. Due to different luminance intervals could result in overlapped reaction on the limited response in limited response range of visual system, scene region splitting and merging were used to segment the scaled luminance and perform the image segmentation to segment image into smaller part. After the region splitting and merging, there will be some noise or variation of intensity that may result in holes or over segmentation. As the result, the morphological operation, opening and closing were used to perform the mask to applied different clip limit of the CLAHE operation.

关键词： Dynamic range Image segmentation Histograms Merging Imaging Conferences Tiles

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An advanced hybrid P2p botnet 2.0

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World Academy of Science, engineering and Technology 2011年 81卷 595-597页

作者： Lu, T.T. Liao, H.Y. Chen, M.F. The Department of Computer Science and Information Engineering University of Ching Yun Chung-Li Taoyuan County 320 Taiwan The Department of Institute of Computer Communication and System Engineering University of Ching Yun Chung-Li Taoyuan County 320 Taiwan

Recently, malware attacks have become more serious over the Internet by e-mail, denial of service (DoS) or distributed denial of service (DDoS). The Botnets have become a significant part of the Internet malware attacks. The traditional botnets include three parts - botmaster, command and control (C&C) servers and bots. The C&C servers receive commands from botmaster and control the distributions of computers remotely. Bots use DNS to find the positions of C&C server. In this paper, we propose an advanced hybrid peer-to-peer (P2P) botnet 2.0 (AHP2P botnet 2.0) using web 2.0 technology to hide the instructions from botmaster into social sites, which are regarded as C&C servers. Servent bots are regarded as sub-C&C servers to get the instructions from social sites. The AHP2P botnet 2.0 can evaluate the performance of servent bots, reduce DNS traffics from bots to C&C servers, and achieve harder detection bots actions than IRC-based botnets over the Internet.

关键词： Botnet

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Computing robot internal/external wrenches by means of inertial, tactile and F/T sensors: Theory and implementation on the iCub

Computing robot internal/external wrenches by means of inert...

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2011 11th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS 2011

作者： Ivaldi, S. Fumagalli, M. Randazzo, M. Nori, F. Metta, G. Sandini, G. Robotics Brain and Cognitive Sciences Department Istituto Italiano di Tecnologia Genoa Italy Department of Communication Computer and System Sciences University of Genoa Italy Institut des Systèmes Intelligents et de Robotique Université Pierre et Marie Curie Paris France Department of Control Engineering University of Twente Enschede Netherlands

ISBN: (纸本)9781612848679

Reliable access to dynamics is one of the central challenges in humanoid robotics. In this paper we consider the problem of computing both internal and external wrenches in open multiple branches kinematic chains, which are not equipped with joint-level torque sensors, but on the contrary are provided with inertial and tactile sensing, and a set of six-axes Force/Torque Sensors (FTS) distributed within the chain. The proposed method is grounded on the Enhanced Oriented Graph, a graph-representation of the kinematic chain, enriched with the information coming from the different sensors. Under suitable conditions, a maximum of N+1 external wrenches can be estimated from N six-axes FTS. The graph is built dynamically, and internal and external wrenches are consequently updated. Theoretical results have been implemented in a software library (iDyn) released with an open-source license (GPL) as part of the iCub software project. The proposed method has been applied to 32 of the 53 DOF of the iCub humanoid robot. © 2011 IEEE.

关键词： Open source software

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Parallelized block match algorithm on multi-core processors

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International Journal of Advancements in Computing Technology 2011年第6期3卷 252-259页

作者： Liangbao, Jiao Jing, Zhou Xiao, Shu School of Communications engineering Nanjing Institute of Technology China College of Communication and Information System Nanjing University of Post and Telecommunications China Department of Electrical and Computer Engineering McMaster University Canada

In order to increase the coding efficiency of H.264/AVC, this paper proposed a parallelized approach of full search (FS) algorithm for motion estimation on Graphic Processor Unit (GPU) using computing unified device architecture (CUDA). By utilizing the independence among different MBs, we are able to take the full advantage of the computational power of CUDA and speed up the FS motion estimation by a large scale. Experimental results show that our implementation on CUDA can be as much as 50 times faster than existing CPU implementations.

关键词： Motion estimation

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Power efficient femtocell distribution strategies

Power efficient femtocell distribution strategies

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International Conference on Software, Telecommunications and computer Networks (SoftCOM)

作者： Yoram Haddad Yisroel Mirsky Computer Science and Networks Department Jerusalem College of Technology Jerusalem Israel Department of Communication System Engineering Ben Gurion University of the Negev Beersheva Israel

Reducing our power consumption is an urgent issue which has important economical and ecological benefits. By using femtocell technology the mobile network can become far more energy efficient than it is today. In this paper, we describe what femtocell technology is and introduce outdoor femtocell distribution strategies that can save the network power. We also compare the usage of typical short-range base stations in place of femtocells and show that femtocells are more efficient. The results of the introduced strategies show that significant power savings of up to 92% can be achieved on a per-macrocell basis if implemented.

关键词： Macrocell networks Base stations Power demand Energy efficiency Energy consumption Internet

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High watermarking capacity based on spatial domain technique

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Information Technology Journal 2011年第7期10卷 1367-1373页

作者： Zeki, Akram M. Manaf, Azizah A. Mahmod, Shayma S. Department of Information System Kulliyyah of Information and Communication Technology International Islamic University Malaysia Malaysia University Technology Malaysia Malaysia Department of Electrical and Computer Engineering Kulliyyah of Engineering International Islamic University Malaysia Malaysia

Watermarking capacity refers to the amount of information we are able to insert intothe image. Low signal to noise ratio is a phenomenon of watermarking channels which severely limits the capacity. The aim of this study was to develop a digital watermarking model which can find out the possibility to embed maximum amount of data in an image withoutdegrading the quality of watermarked image. In this approach, the host image will be partitioned into non-overlapping blocks and passing an imaginary plane in the three criticalpixels. The characteristics of this plan should not be changed after embedding message;then the same characteristics will be used to evaluate the embedded capacity in the extracting module. © 2011 Asian Network for Scientific Information.

关键词： Image quality

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A prediction of mRNA polyadenylation sites in human genes

A prediction of mRNA polyadenylation sites in human genes

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2011 11th IEEE International Conference on Bioinformatics and Bioengineering, BIBE 2011

作者： Horng, Jorng-Tzong Wu, Li-Ching Liu, Shun-Kai Chang, Cheng-Wei Chao, Tsung-Ming Yeh, Rong-Hwei Cheng, Kuang-Fu Department of Computer Science and Information Engineering National Central University Taiwan Graduate Institute of System Biology and Bioinformatics National Central University Taiwan Department of Bioinformatics Asia University Taiwan Department of Information Management Hsing Wu College Taiwan Department of International Business Ching Yun University Taiwan Department of Photonics and Communication Engineering Asia University Taiwan Department of Public Health Graduate Institute of Statistics China Medical University China

ISBN: (纸本)9780769543918

mRNA polyadenylation is an essential mechanism in human genes and is direct linked to the termination of transcription. Alternative polyadenylation changes the length of the mature mRNA's 3′UTR. Since 3′UTRs have been shown to contain regulatory elements that control mRNA functioning, alternative polyadenylation plays an important role in controlling the expression of human genes. Prediction of polyadenylation sites can help with the identification of genes and aid our understanding of the mechanisms of alternative polyadenylation. In this study, we constructed a system for mRNA polyadenylation site prediction in human genes using SVM and based on an analysis of the sequence alignment between pair-end diTags (PET) and genome sequences. The PET sequences were mapped to the reference genome more accurate compared to earlier methods. We also analyzed single-site type and multiple-site type sequences PET sequence datasets and found that the frequencies of each nucleotide were different when the single-site type and multiple-site type PET sequences were compared. © 2011 IEEE.

关键词： Forecasting

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ACF comparison of various spreading sequences for T-DMB watermarking system

ACF comparison of various spreading sequences for T-DMB wate...

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2011 International Conference on ICT Convergence, ICTC 2011

作者： Lee, Seungho Lee, Junghoon Lee, Yongtae Baek, Myungsun Lim, Bomi Rho, Jungkyu Jeong, Incheol Cha, Jaesang Dept. of Media Eng. Seoul National Univ. of Science and Tech. Seoul Korea Republic of Broadcasting System Research Department Broadcasting and Telecommunication Media Research Division ETRI Korea Republic of Dept. of Computer Science Seokyeong Univ. Seoul Korea Republic of Dept. of Computer and Communication Engineering Sungkonghoe University Seoul Korea Republic of

ISBN: (纸本)9781457712678

This paper compared ACF(Auto Correlation Feature) characteristics for ZCD, Kasami and Golay codes. Sequence codes have been used as a spreading sequence in order to overcome ICI(Inter Code Interference) caused by transmitter and MPI(Multiple Path Interference) in receiver. In this paper, we abstracted characteristics of each spreading code and analyzed the properties of them. © 2011 IEEE.

关键词： Codes (symbols)

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A neuro fuzzy PI controller used for speed control of a direct torque to twelve sectors controlled induction machine drive

A neuro fuzzy PI controller used for speed control of a dire...

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IEEE International Conference on Multimedia Computing and systems (ICMCS)

作者： M. R. Douiri M. Cherkaoui T. Nasser A. Essadki Department of electrical engineering Mohammadia School of Engineers (EMI) Rabat Morocco Department Communication Networks National School of Computer Science and System Analysis ENSIAS Rabat Morocco Department electrical engineering Superior School of Technical Education ENSET Rabat Morocco

This paper presents a new speed controller based on the theory of adaptive fuzzy inference system based on neural (ANFIS) for a direct torque to twelve sectors controlled of the induction motor. The proposed controller integrates fuzzy logic algorithm with a structure of artificial neural network (ANN) five-layer in order to reap the benefits of both methods, the learning abilities of the first and readability and flexibility of the second. The controller replaces the conventional PI is the rule fuzzy inference system with the hybrid learning algorithm. This makes learning the fuzzy system. The performance of the proposed neuro-fuzzy control for induction motor speed was studied at different operating conditions. The simulation study shows the robustness and relevance of control for applications in high performance driving.

关键词： Torque Stators Neurons Torque control Inference algorithms Induction motors Switches

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