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A Bandwidth Smoothing Algorithm Applied in Streaming Media system upon Home network

A Bandwidth Smoothing Algorithm Applied in Streaming Media S...

2010 2nd International Conference on Education Technology and Computer(第二届IEEE教育技术与计算机国际会议 ICETC 2010)

作者： Haiwei Wang Peng Sun Xiaoyong Zhu Hong Ni Key Lab of Network Communication System and Control Chinese Academy of Sciences Key Lab of Anhui N National Network New Media Engineering Research Center Institute of AcousticsChinese Academy of Sci

ISBN: (纸本)9781424463671;9781424463688;9781424463701

Bandwidth smoothing can increase the utility of network bandwidth by reducing the burstiness of a VBR (variable bit rate) video stream. To guarantee the quality of service of video-on-command service in home network, data transmission rate should not exceed the maximum data handling capacity of embedded terminals. This paper designs a streaming media system in home network, and puts forward a smoothing algorithm based on greedy algorithm for transmitting VBR video streams subjected to maximum data transmitting rate. The presented algorithm can decrease startup delay of streaming and meet the demand of client buffering requirement under the constraint of maximum transmission rate. Experiment results demonstrate the effectiveness of the presented algorithm.

关键词： home network streaming media system variable bit rate bandwidth smoothing

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Dynamic scheduling for workflow applications over virtualized optical networks

Dynamic scheduling for workflow applications over virtualize...

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2011 IEEE Conference on Computer communications Workshops, INFOCOM WKSHPS 2011

作者： Ding, Jingyu Wang, Yan Le, Jiajin Jin, Yaohui School of Computer Sci. Tech. Donghua Univ. China Huawei Technology China State Key Lab of Advanced Optical Communication System and Network Shanghai Jiao Tong University China

ISBN: (纸本)9781457702488

Joint scheduling of both computation and communication resources for workflow based distributed computing application over optical networks has been studied recently. Most algorithms proposed in previous work are mainly based on static scheduling strategies with assumption that detail resource information and accurate performance prediction is available. In this paper, we propose to employ shared virtualized optical network (VON) for the task scheduling problem. Both customers and carriers can benefit from such architecture with better flexibility and scalability. Based on a new Scheduled Result Graph (SRG) concept, we propose a computation and communication delay aware rescheduling (C2DAR) scheme to deal with the dynamics from shared VON resources. We evaluate the performance of dynamic scheduling scheme over shared VON in comparison to the static scheduling over dedicated VON and entire optical network respectively. Simulation results also show that C2DAR scheme outperforms traditional computation delay aware rescheduling (CDAR) scheme under shared VON scenario. © 2011 IEEE.

关键词： Scheduling algorithms

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Direct multi-hop time synchronization with constructive interference

Direct multi-hop time synchronization with constructive inte...

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11th ACM/IEEE Conference on Information Processing in Sensing networks, IPSN'12

作者： Wang, Yin Pan, Gaofeng Huang, Zhiyu MOE Key Lab. for Information System Security School of Software TNLIST China Science and Technology on Communication Information Security Control Laboratory China Institute of Software Chinese Academy of Sciences China

ISBN: (纸本)9781450312271

Multi-hop time synchronization in wireless sensor networks (WSNs) is often time-consuming and error-prone due to random time-stamp delays for MAC layer access and unstable clocks of intermediate nodes. Constructive interference (CI), a recently discovered physical layer phenomenon, allows multiple nodes transmit and forward an identical packet simultaneously. By leveraging CI, we propose direct multi-hop (DMH) time synchronization by directly utilizing the time-stamps from the sink node instead of intermediate nodes, which avoids the error caused by the unstable clock of intermediate nodes. DMH doesn't need decode the flooding time synchronization beacons. Moreover, DMH explores the linear regression technique in CI based time synchronization to counterbalance the clock drifts due to clock skews. © 2012 ACM.

关键词： Synchronization

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Exploiting Pose Mask Features for Video Action Recognition 5

Exploiting Pose Mask Features for Video Action Recognition

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5th IEEE International Conference on Computer and communications, ICCC 2019

作者： Miao, Junqing Xia, Hailun Zeng, Zhimin Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture Convergence Beijing Lab. of Adv. Info. Networks Sch. of Info. and Communication Engineering Beijing China

ISBN: (纸本)9781728147437

Existing state-of-the-art approaches in video action recognition mostly adopt RGB images and optical flows as input and neglect the abundant information provided by human poses. In this paper, we present a novel method that highlights the essential area of human body and takes it as complementary input for existing action recognition pipelines. The method, called Pose Mask network (PMN), leverages a 2D pose estimator to extract heatmaps from frames and utilizes them as Pose Masks on the original images. The Pose Masks are robust to the variance of background and focus on key information of human body. Experiments show that our Pose Mask yields a result far exceeding that of using simple pose representations. More importantly, PMN acts as a supplement to other RGB-based approaches. Combining our PMN with Temporal Segment network, we obtain state-of-the-art performance on the HMDB51 and JHMDB datasets. © 2019 IEEE.

关键词： Gesture recognition

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Admission control for P2P-based Media Delivery network

Admission control for P2P-based Media Delivery Network

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Chinese control Conference (CCC)

作者： Shan Lu Baoqun Yin Dong Guo Key Lab of Network Communication System and Control Chinese Academy of Sciences Department of Automation University of Science and Technology of China Hefei 230027 China

With wider application of P2P-based Media Delivery network (P2P-based MDN), much work has been done to improve the system' performance and efficiency in the process of media contents sharing. In this paper, we first propose a specific partially observable Markov Decision Process (POMDP) model for admission control of P2P-based MDN. Based on this model, we provide the observation-based randomized policy to conduct admission control and optimize the policy by applying policy-gradient algorithm. Observation-based policy can promote the system's performance in real time aspect and policy optimizing can increase the accuracy of controller's judgments based on partial information. Admission strategy in the paper can save the cost in operating the system for media service providers. Bandwidth allocation policy is designed to reduce service delay and provide high-quality service. The comparison results of system's performances under different policies indicate that, partial service can utilize the system's resource in a better way.

关键词： Admission control Bandwidth Media Markov processes Servers Motion pictures Biological system modeling

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An efficient video copy detection method based on video signature

An efficient video copy detection method based on video sign...

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IEEE International Conference on Automation and Logistics

作者： Zheng Cao Ming Zhu Department of Automation The Key Laboratory of Network Communication System & Control University of Science and Technology Hefei Anhui China

ISBN: (纸本)9781424447947

With the rapid increasing popularity of web video, video copy detection (VCD) has become a hot research field in content-based video retrieval. Many efforts have been carried out to improve the effectiveness and efficiency of copy detection. In order to solve two challenging problems: video feature extraction and fast search in large database, a novel efficient video copy detection approach was proposed in this paper. A compact video signature was computed based on spatial-temporal features of video sequences. The video similarity is measured by the distance of video signature. For the scalable computing requirement, a new search method via clustering index table was presented by index clustering. The experimental results from query tests in large database show this method is efficient with high recall and precision rate.

关键词： Spatial databases Chromium Feature extraction Indexing Automation Videoconference communication system control control systems Content based retrieval Search methods

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Multi-task label embedding for text classification

arXiv

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arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Chen, Wenqing Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning in text classification leverages implicit correlations among related tasks to extract common features and yield performance gains. However, most previous works treat labels of each task as independent and meaningless one-hot vectors, which cause a loss of potential information and makes it difficult for these models to jointly learn three or more tasks. In this paper, we propose Multi-Task label Embedding to convert labels in text classification into semantic vectors, thereby turning the original tasks into vector matching tasks. We implement unsupervised, supervised and semi-supervised models of Multi-Task label Embedding, all utilizing semantic correlations among tasks and making it particularly convenient to scale and transfer as more tasks are involved. Extensive experiments on five benchmark datasets for text classification show that our models can effectively improve performances of related tasks with semantic representations of labels and additional information from each other. Copyright © 2017, The Authors. All rights reserved.

关键词： Embeddings

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A generalized recurrent neural architecture for text classification with multi-task learning

arXiv

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arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning leverages potential correlations among related tasks to extract common features and yield performance gains. However, most previous works only consider simple or weak interactions, thereby failing to model complex correlations among three or more tasks. In this paper, we propose a multi-task learning architecture with four types of recurrent neural layers to fuse information across multiple related tasks. The architecture is structurally flexible and considers various interactions among tasks, which can be regarded as a generalized case of many previous works. Extensive experiments on five benchmark datasets for text classification show that our model can significantly improve performances of related tasks with additional information from others. Copyright © 2017, The Authors. All rights reserved.

关键词： Text processing

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OMP spectrum sensing algorithm based on differential signal 4

OMP spectrum sensing algorithm based on differential signal

引用

4th International Conference on Multimedia Technology, ICMT 2015

作者： Hu, Weikang Gu, Xiaowei Kong, Xianzheng Zhao, Zhijin Wang, Haiquan School of Telecommunication Engineering Hangzhou Dianzi University Hangzhou China State Key Lab of Information Control Technology in Communication System of No. 36 Research Institute China Electronic Technology Corporation Jiaxing China

ISBN: (纸本)9781138027947

According to the small variety of received signals in a short timeslot, the OMP spectrum sensing algorithm based on differential signal is proposed. Firstly the algorithm differentiates the previous signal and current signal, and detects its spectrum to acquire the information of channel variation. Secondly the current channel state is exclusive OR of the previous channel state and channel variation. At last, the current occupied spectrum can be obtained by the channel state. Simulation results show that the proposed algorithm can greatly reduce computational complexity and achieve a better performance. © 2015 Taylor & Francis Group, London.

关键词： Differential signal Sparsity Spectrum sensing Support set

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Fusing Visual Tracking and Navigation for Autonomous control of An Intelligent Wheelchair

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IFAC Proceedings Volumes 2013年第20期46卷 549-554页

作者： Shuangshuang Lei Zhijun Li The Key Lab of Autonomous System and Network Control College of Automation Science and Engineering South China University of Technology Guangzhou China

This paper presents a hybrid navigation and control method for intelligent wheelchair. A robust and semi-supervised vision tracking method using Microsoft Kinect and obstacle avoidance navigation approach are integrated into a two-level control system. Then, position tracking control considering nonholonomic constraints are adopted for the motion control of wheelchairs. An indoor environment is set up for evaluating the application of the proposed approaches. The experimental results show that the proposed method is effective and can be used as a hands-free controller for the intelligent wheelchair.

关键词： Intelligent wheelchair vision tracking obstacle avoidance

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