PRISM, an IP-based architecture
for broadband access to TV and
other streaming media
A. Basso, C. D. Cranor, R. Gopalakrishnan,
M. Green, C. Kalmanek, D. Shur, S. Sibal,
C. Sreenan & J.E. van der Merwe
AT&T Labs - Research &
University College Cork, Ireland
IP-based networks such as the Internet have been the focal
point for innovative technologies, services, and applications.
These networks have enabled hugely successful
services like the World Wide Web, and they are even attracting
traditional services such as telephony. The service
model for accessing Web content offers tremendous control
and choice to users. In particular the on-demand nature of
this model provides users instant access to content of their
Another class of services enabled by IP networks is the
delivery of streaming audio and video content. While the
Web service model also extends to IP-based streaming content,
the user experience today does not compare favorably
with the quality of broadcast TV. Current broadcasting
technologies such as TV, cable, and satellite offer high
quality but provide limited choice and do not allow users
to access content at arbitrary times (i.e. no on-demand
access). Broadcasting is geared towards a "push" model
where content distributors control what content is made
available to viewers and the time at which it is broadcast.
Furthermore, broadcasting systems are essentially closed ...
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- Last revised: Weds Jun 27 20:56:29 EDT 2000