Download or read book Robust Video Transmission Over Lossy Channels and Efficient Video Distribution Over Peer to peer Networks written by Jiajun Wang and published by . This book was released on 2008 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Peer to Peer Video Streaming written by Eric Setton and published by Springer Science & Business Media. This book was released on 2007-09-30 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Peer-to-Peer Video Streaming describes novel solutions to enhance video quality, increase robustness to errors, and reduce end-to-end latency in video streaming systems. This book will be of use to both academics and professionals as it presents thorough coverage and solutions for current issues with Video Streaming and Peer-to-Peer architectures. The book provides an overview of today’s state-of-the art video streaming technology. It presents adaptive video coding and streaming techniques for performance enhancement of conventional client-server systems and P2P multicast. The detailed appendix incorporates various additional experiments.

Download or read book Low latency and Robust Peer to peer Video Streaming written by JeongHun Noh and published by Stanford University. This book was released on 2010 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Peer-to-peer (P2P) systems have emerged as a promising and cost-effective transport solution for streaming video to a group of users in the Internet. In the P2P architecture, users not only consume video, but also forward it to other users. Thus, P2P systems scale better than client-server systems as users bring resources to the system. The challenge is to achieve low-latency and robust video dissemination by overcoming a number of adversarial aspects and challenges -- peer dynamics, heterogeneous uplink bandwidth of peers, heterogeneous hardware and capabilities of peers, and peer-wise connection restrictions due to NATs/firewalls. This dissertation presents Stanford Peer-to-Peer Multicast (SPPM), a P2P video streaming system. SPPM is designed to achieve low-latency and robust streaming by constructing an overlay of multiple complementary trees and dynamically rearranging the position of peers by Active Overlay Management in a distributed fashion. Next, we extend SPPM for providing playback control to users by time-shifted streaming. To perform time-shifted streaming, peers store past portions of video and forward them to other users when requested, thereby reducing server load. To further alleviate server load, we propose fast prefetching, by which peers can disseminate content quickly. Finally, we present a way to accommodate mobile users. Video transcoding is often required to adapt video for the mobile users. We propose interleaved distributed transcoding (IDT), which allows a video stream to be transcoded at multiple peers that are more capable than mobile users. IDT is shown not only to reduce computation required at a peer but also to achieve higher error resilience in case of peer failure or packet loss.

Download or read book Parallel and Distributed Computing written by Alberto Ros and published by BoD – Books on Demand. This book was released on 2010-01-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14 chapters presented in this book cover a wide variety of representative works ranging from hardware design to application development. Particularly, the topics that are addressed are programmable and reconfigurable devices and systems, dependability of GPUs (General Purpose Units), network topologies, cache coherence protocols, resource allocation, scheduling algorithms, peertopeer networks, largescale network simulation, and parallel routines and algorithms. In this way, the articles included in this book constitute an excellent reference for engineers and researchers who have particular interests in each of these topics in parallel and distributed computing.

Download or read book Low latency and Robust Peer to peer Video Streaming written by JeongHun Noh and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Peer-to-peer (P2P) systems have emerged as a promising and cost-effective transport solution for streaming video to a group of users in the Internet. In the P2P architecture, users not only consume video, but also forward it to other users. Thus, P2P systems scale better than client-server systems as users bring resources to the system. The challenge is to achieve low-latency and robust video dissemination by overcoming a number of adversarial aspects and challenges -- peer dynamics, heterogeneous uplink bandwidth of peers, heterogeneous hardware and capabilities of peers, and peer-wise connection restrictions due to NATs/firewalls. This dissertation presents Stanford Peer-to-Peer Multicast (SPPM), a P2P video streaming system. SPPM is designed to achieve low-latency and robust streaming by constructing an overlay of multiple complementary trees and dynamically rearranging the position of peers by Active Overlay Management in a distributed fashion. Next, we extend SPPM for providing playback control to users by time-shifted streaming. To perform time-shifted streaming, peers store past portions of video and forward them to other users when requested, thereby reducing server load. To further alleviate server load, we propose fast prefetching, by which peers can disseminate content quickly. Finally, we present a way to accommodate mobile users. Video transcoding is often required to adapt video for the mobile users. We propose interleaved distributed transcoding (IDT), which allows a video stream to be transcoded at multiple peers that are more capable than mobile users. IDT is shown not only to reduce computation required at a peer but also to achieve higher error resilience in case of peer failure or packet loss.

Download or read book Emerging Research on Networked Multimedia Communication Systems written by Kanellopoulos, Dimitris and published by IGI Global. This book was released on 2015-08-14 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: ###############################################################################################################################################################################################################################################################

Download or read book Computer Networks and Information Technologies written by Vinu V Das and published by Springer Science & Business Media. This book was released on 2011-03-07 with total page 687 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Second International Conference on Advances in Communication, Network, and Computing, CNC 2011, held in Bangalore, India, in March 2011. The 41 revised full papers, presented together with 50 short papers and 39 poster papers, were carefully reviewed and selected for inclusion in the book. The papers feature current research in the field of Information Technology, Networks, Computational Engineering, Computer and Telecommunication Technology, ranging from theoretical and methodological issues to advanced applications.

Download or read book Design and Implementation of Robust Mode Decision Algorithmsfor Video Transmission Over Lossy Networks written by 楊雅倫 and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low delay Robust Video Multicast written by Zhi Li and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Video multicast offers a scalable solution for large-scale television distribution. For commercial-grade video multicast services such as Internet Protocol Television (IPTV), it is often challenging to meet a set of conflicting design goals, including high video quality, low request response time and good system scalability. This dissertation addresses these issues by developing a decentralized peer-assistance architecture and integrating it with streaming-specific source and channel coding techniques to deliver multicast video in a timely, reliable and scalable way. Video quality is negatively affected by network packet loss. An existing framework to simultaneously address packet loss and request response delay is to combine multicast with a unicast service that provides both packet loss repair and fast stream startup functionalities. Typically, servers that provide the unicast service could become the system bottleneck. To mitigate this problem, we propose an alternative distributed solution to partially shift the burden of the unicast servers to receivers of the multicast. Using a Peer-Assisted Repair (PAR) protocol, we demonstrate that packet repairs can be delivered reliably on time using a combination of server-peer coordination and redundant repairs. PAR can be naturally extended to a Peer-Assisted Startup (PAS) protocol to facilitate fast stream startup, where a missing portion of the multicast stream is treated as a long erasure burst to be repaired. In these applications, we show that video transcoding can be seamlessly integrated to provide improved robustness to packet loss, reduced stream startup latency and improved system scalability. Erasure correcting coding plays an essential role in the peer-assistance architecture. To understand how to mitigate its delay into the stream startup process, we explore the design of erasure correcting codes that takes into account a decoding delay constraint. Modeling the peer-assisted unicast service as communication over a set of parallel links, we propose a practical construction of parallel-link block erasure correcting code, where each source packet is decoded at the sink on-the-fly with a strict decoding deadline. The proposed code handles two types of common errors in the upper layers of packet-switched networks -- bursty packet loss and link outages. We further show that the proposed code construction is delay-optimal among all codes that achieve the Singleton bound. The proposed decentralized architecture requires in-network video transcoding at the multicast peer receivers, where it is often desirable to use a scheme with low complexity, such as open-loop requantization-based transcoding. A known drawback of this scheme is the requantization distortion drift problem. We develop an analytical model to capture the distortion drift effect and show that this drawback can be largely mitigated through parameter optimization. We demonstrate its effectiveness in the transcoded-to-primary stream switching problem in fast stream startup.

Download or read book 3DTV Content Capture Encoding and Transmission written by Daniel Minoli and published by John Wiley & Sons. This book was released on 2010-12-28 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First to Present 3D Technology as Applied to Commercial Programming for the Consumer This is the first book to provide an overview of the technologies, standards, and infrastructure required to support the rollout of commercial real-time 3 Dimension Television/3 Dimension Video (3DTV/3DV) services. It reviews the required standards and technologies that have emerged—or are just emerging—in support of such new services, with a focus on encoding mechanisms formats and the buildout of the transport infrastructure. While there is a lot of academic interest in various intrinsic aspects of 3DTV, service providers and consumers ultimately tend to take a system-level view. 3DTV stakeholders need to consider the overall architectural system-level view of what it will take to deploy an infrastructure that is able to reliably and cost-effectively deliver a commercial-grade quality bundle of multiple 3DTV content channels to paying customers with high expectations. This text, therefore, takes such a system-level view, revealing how to actually deploy the technology. Presented in a self-contained, tutorial fashion, the book begins with a review of 3DTV in the marketplace and the opportunities and challenges therein. Recent industry events related to 3D are also discussed. From there, the fundamental visual concepts supporting stereographic perception of 3DTV/3DV are explained, as are encoding approaches. Readers will understand frame mastering and compression for conventional stereo video (CSV) and more advanced methods such as video plus depth (V+D), multi-view video plus depth (MV+D), and layered depth video (LDV). Next, the elements of an end-to-end 3DTV system are covered from a satellite delivery perspective, with explanations of digital video broadcasting (DVB) and DVB-handheld. Transmission technologies are assessed for terrestrial and IPTV-based architecture; IPv6 is reviewed in detail. Finally, the book presents 3DTV/3DV standardization and related activities, which are critical to any type of broad deployment. System planners, the broadcast TV industry, satellite operators, Internet service providers, terrestrial telecommunication carriers, content developers, design engineers, venture capitalists, and students and professors are among those stakeholders in these services, and who will rely on this volume to discover the latest 3D advances, market opportunities, and competing technologies.

Download or read book Compression and Networking Issues Related to Robust Transmission of Video Over Packet Switched Networks written by and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: With ever growing network resources, video communication is an important part of today's internet applications. In this research, we developed a spectrum of techniques for unicast and multicast video communication over packet switched networks. These included best effort networks, as well as Quality of Service (QoS) enabled ones, such as those with Diffserv. In doing so, we pay particular attention to video compression techniques, as well as networking issues. Specifically, in the area of video compression, we continued our efforts on application of overcomplete signal expansion schemes to video coding, and explored a number of issues related to matching pursuits based video coding. These include, dictionary approximation, dictionary design, modulus quantization, rate control, multiple description coding and its application to wireless video communication. In the area of video multicast, we proposed the use of hierarchical FEC-as an-error control mechanism that allows receivers to individually trade off latency for received video quality. This scheme is efficient since FEC packets are used to protect only the more important days layers and are multicast only to receivers that need them, thereby improving network utilization. We - perform actual MBONE experiments to evaluate the performance of our scheme.

Download or read book Robust Transmission of Packet Based H 264 AVC Video with Data Partitioning Over DS CDMA Wireless Channels written by and published by . This book was released on 2005 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we address the problem of robust transmission of packet based H.264/AVC video over Direct Sequence - Code Division Multiple Access (DS-CDMA) channels. H.264 provides excellent coding efficiency and ease of transportation over a wide range of networks. Along with other error-resilience features, data partitioning is employed while encoding the source to produce video packets of unequal importance. We investigate the use of data partitioning for such wireless systems for a wide range of channel conditions and various DS-CDMA receiver types. The performance of this system is compared with the encoding and transmission schemes not using data partitioning. In the proposed system, the data partitioned video packets are packetized into packets of equal size, as per IP/UDP/RTP based network architecture and are sorted into levels for giving unequal error protection (UEP) using Rate Compatible Punctured Convolutional (RCPC)/Cyclic Redundancy Check (CRC) codes. After spreading and modulating, the resultant bitstream is transmitted over a multipath Rayleigh fading channel with Additive White Gaussian Noise (AWGN) and interference. The received data are despreaded and demodulated using the Auxiliary Vector (AV) receiver or conventional RAKE matched filter (RAKE-MF) receiver and, subsequently, channel and source decoded. Our experimental results show the effectiveness of using data partitioning for transmissions over wireless networks. Also for such systems, the superior interference mitigation capabilities of the AV receiver are shown in comparison to the RAKE-MF receiver.

Download or read book Multimedia over IP and Wireless Networks written by Mihaela van der Schaar and published by Elsevier. This book was released on 2011-07-28 with total page 713 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multimedia over IP and Wireless Networks is an indispensable guide for professionals or researchers working in areas such as networking, communications, data compression, multimedia processing, streaming architectures, and computer graphics. Beginning with a concise overview of the fundamental principles and challenges of multimedia communication and networking, this book then branches off organically to tackle compression and networking next before moving on to systems, wireless multimedia and more advanced topics. The Compression section advises on the best means and methodology to ensure multimedia signal (images, text, audio and data) integrity for transmissions on wireless and wired systems. The Networking section addresses channel protection and performance. In the Systems section, the focus is on streaming media on demand, live broadcast and video and voice's role in real-time communication. Wireless multimedia transmission and Quality of Service issues are discussed in the Wireless Multimedia section. An Advanced Topics section concludes the book with an assortment of topics including Peer-to-Peer multimedia communication and multipath networks. Up-to-date coverage of existing standards for multimedia networking Synergistic tutorial approach reinforces knowledge gained in previous chapters Balanced treatment of audio and video with coverage of end-to-end systems

Download or read book Proceedings of the International Workshop on Network and Operating Systems Support for Digital Audio and Video written by and published by . This book was released on 2002 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Sleep Apnoea Monitoring written by Nemai Chandra Karmakar and published by Springer. This book was released on 2017-12-21 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the design, development and field trials of radio frequency based wireless monitoring system for sleep apnoea patients. It contains 4 major areas including general background of wireless monitoring technology and MIMO in wireless body area network (WBAN), microwave hardware designs, virtual MIMO in WBAN and hardware system level implementation and field trials. At components level, this book presents the design theory, process and examples of bandpass filters, lowpass filters, low profile patch antennas, power amplifiers and oscillators which are the key elements in transducer designs in the body area network and cooperative communication wireless sensor network system. At system level, this book features the hardware integration, field trial and network coding techniques. This book also gives a presentation of virtual MIMO applications, e.g. MIMO implementation using FPGA, correlation coefficient measurement. The book will create impact in the fields of wireless monitoring technology in biomedical engineering, which have been growing exponentially.

Download or read book Journal of Zhejiang University written by and published by . This book was released on 2006 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Evolution of Untethered Communications written by National Research Council and published by National Academies Press. This book was released on 1998-01-01 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to a request from the Defense Advanced Research Projects Agency, the committee studied a range of issues to help identify what strategies the Department of Defense might follow to meet its need for flexible, rapidly deployable communications systems. Taking into account the military's particular requirements for security, interoperability, and other capabilities as well as the extent to which commercial technology development can be expected to support these and related needs, the book recommends systems and component research as well as organizational changes to help the DOD field state-of-the-art, cost-effective untethered communications systems. In addition to advising DARPA on where its investment in information technology for mobile wireless communications systems can have the greatest impact, the book explores the evolution of wireless technology, the often fruitful synergy between commercial and military research and development efforts, and the technical challenges still to be overcome in making the dream of "anytime, anywhere" communications a reality.