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Summary: IEEE International Conference on Acoustics, Speech, and Signal Processing, Salt Lake City, Utah, May 2001.
SECURE SCALABLE VIDEO STREAMING FOR WIRELESS NETWORKS
Susie J. Wee and John G. Apostolopoulos
Streaming Media Systems Group
Hewlett-Packard Laboratories, Palo Alto, CA USA
ABSTRACT
We present a wireless video streaming system that securely
and efficiently streams video to heterogeneous clients over time-
varying communication links. Clients may differ in their display,
power, communication, and computational capabilities and wire-
less channels may have time-varying bandwidths and quality levels
that depend on channel usage and channel conditions. End-to-end
system efficiency is achieved by placing transcoders at interme-
diate network nodes; these transcoders can easily adapt the video
stream for particular client capabilities and network conditions.
This system uses our proposed method of secure scalable stream-
ing (SSS) to simultaneously achieve scalability, efficiency, and
security. Specifically, an SSS coder encodes video into secure
scalable packets by using jointly designed scalable video coding,
packetization, and progressive encryption techniques. This allows
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