August 2004
Vol.42 No.8
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Proxy Support for Streaming in the Internet |
| Nelson L. S. da Fonseca and Prashant Shenoy |
Picture-Perfect Streaming over the Internet: Is There Hope?
Quality of service in streaming of continuous media over the Internet is poor, which is partly due to variations in delays, bandwidth limitations, and packet losses. Although continuous media applications can tolerate some missing data, non-recoverable information loss degrades these applications' QoS. Consequently, a number of application areas have backed away from streaming of their content over the Internet. The inability to control the resulting visual and auditory quality of the resulting streamed presentation is an important reason for such a trend. The authors believe that this trend can be reversed.
Bassem Abdouni, Bill Cheng, Alix L. H. Chow, and Leana Golubchik, University of Southern California, Los Angeles; John C. S. Lui, The Chinese University of Hong Kong, ShatinPath Diversity for Enhanced Media Streaming
Media streaming over best effort packet networks such as the Internet is quite challenging because of the dynamic and unpredictable available bandwidth, loss rate, and delay. Recently, streaming over multiple paths to provide path diversity has emerged as an approach to help overcome these problems.
John G. Apostolopoulos and Mitchell D. Trott, Streaming Media Systems Group, HP LabsProxy Caching for Media Streaming Over the Internet
Streaming media has contributed to a significant amount of today's Internet traffic. Like conventional Web objects (e.g., HTML pages and images), media objects can benefit from proxy caching; but their unique features, such as huge size and high bandwidth demand, imply that conventional proxy caching strategies have to be substantially revised.
Jiangchuan Liu, Simon Fraser University; Jianliang Xu, Hong Kong Baptist UniversityLayer-Encoded Video Streaming: A Proxy's Perspective
The support of layer-encoded video streaming with the aid of proxies enables a video distribution infrastructure that is efficient in today's Internet, and allows new mechanisms and techniques to be leveraged in a future Internet.
Michael Zink, University of Massachusetts; Jens Schmitt, University of Kaiserslautern; Carsten Griwodz, University of OsloLarge-Scale Personalized Video Streaming with Program Insertion Proxies
Increasingly intelligent Internet overlay networks promise to deliver streaming media and value-added media services in ways that cannot be achieved easily with conventional broadcast networks. Such an overlay would allow an individual viewer or groups of viewers to receive unique programming content that matches their previously specified preferences. Toward this end, we introduce a scalable overlay network architecture and signaling mechanism that permits dynamic program insertions in live high-quality video streams transmitted over IP networks.
Jack Brassil, Hewlett-Packard Laboratories and Taehyun Kim, Georgia Institute of TechnologyAccelerating Peer-to-Peer Networks for Video Streaming Using Multipoint-to-Point Communication
Peer-to-peer overlay networks have attracted considerable attention. The notion of end users collaborating to support a richer set of network services with no network infrastructure support has been well received. This is not surprising given the understandably slow rate of deployment for any service that requires changes to the Internet infrastructure.One communication paradigm that has come into the limelight with the advent of peer-to-peer networking is multipoint-to-point communication. A single "client" (requesting peer) can use multiple "servers" (supplying peers) to access the desired content, and gain from the resulting parallelization of the access.
Hung-Yun Hsieh and Raghupathy Sivakumar; Georgia Institute of Technology
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Wireless Communications for Consumer Electronics |
| Bernard Shung, Giorgio M. Betti, Charles Chien, and Jim Goodman |
Phased Array Systems in Silicon
Phased array systems, a special case of MIMO systems, take advantage of spatial directivity and array gain to increase spectral efficiency. Implementing a phased array system at a high frequency in a commercial silicon process technology presents several challenges. The authors focus on the architectural and circuit-level trade-offs involved in the design of the first silicon-based fully integrated phased array system operating at 24 GHz.
A. Hajimiri, A. Komijani, A. Natarajan, R. Chunara, and X. Guan, California Institute of Technology; H. Hashemi, University of Southern CaliforniaA Ku-Band Monolithic Receiver for DVB-S Applications
Despite the incessant progress observed in fixed and wireless terrestrial communication networks, satellite systems remain an appealing solution for broadcasting, point-to-point, and multicasting telecommunications, because of undemanding customer equipment and wide coverage capability. In this scenario, digital video broadcasting via satellite (DVB-S) is recognized as one of the main market-attractive telecommunication fields.
Santo A. Smerzi and Giovanni Girlando, STMicroelectronics; Tino Copani and Giuseppe Palmisano, University of CataniaDesign of Ultra-Low-Cost UHF RFID Tags for Supply Chain Applications
The availability of inexpensive CMOS technologies that perform well at microwave frequencies has created new opportunities for automated material handling within supply chain management (SCM) that will, in hindsight, be viewed as revolutionary.
Rob Glidden, Cameron Bockorick, Scott Cooper, Chris Diorio, David Dressler, Vadim Gutnik, Casey Hagen, Dennis Hara, Terry Hass, Todd Humes, John Hyde, Ron Oliver, Omer Onen, Alberto Pesavento, Kurt Sundstrom, and Mike Thomas, Impinj, Inc.
