Summary: Video Multicast over the Internet \Lambda
Xue Li y Mostafa H. Ammar Sanjoy Paul
Bell Laboratories College of Computing Bell Laboratories
Lucent Technologies Georgia Institute of Technology Lucent Technologies
Murray Hill, NJ 07974 Atlanta, GA 30332 Holmdel, NJ 07733
lixue@research.bell­labs.com ammar@cc.gatech.edu sanjoy@dnrc.bell­labs.com
Abstract
Multicast (multipoint) distribution of video is an important component of many existing and
future networked services. Today's Internet lacks support for quality of service (QoS) assurance
which makes the transmission of real­time traffic (such as video) challenging. In addition,
the heterogeneity of the Internet's transmission resources and end­systems makes it extremely
difficult, if not impossible, to agree on acceptable traffic characteristics among multiple receivers
of the same video stream. In this paper we survey techniques that have been proposed for
transmitting video in this environment. These techniques generally involve adaptation of the
video traffic carried over the network to match receiver requirements and network conditions.
In addition to their applicability to the near­term capabilities of the Internet, they also are of
relevance to a future, QoS­aware Internet environment because of the inevitable inaccuracies
in traffic and resource reservation specifications. We first consider source­based techniques in
which the source adjusts the video stream traffic to match some consensus among the receivers
about its desired characteristics. These techniques can result in an unfair treatment for receivers

Source: Ammar, Mostafa - College of Computing, Georgia Institute of Technology

Collections: Computer Technologies and Information Sciences