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WaveVideo -- An Integrated Approach to Adaptive Wireless Video
George Fankhauser, Marcel Dasen, Nathalie Weiler, Bernhard Plattner,
Burkhard Stiller
ACM Monet, Special Issue on Adaptive Mobile Networking and Computing,
Vol. 4 No. 4, 1999
Abstract: Wireless video in acceptable quality is only possible
by following an end-to-end approach. WaveVideo is such an integrated, adaptive
video coding architecture designed for heterogeneous wireless networks. It
includes basic video compression algorithms based on wavelet transformations,
an efficient channel coding, a filter architecture for receiver- based media
scaling, and error-control methods to adapt video transmissions to the wireless
environment. Using a joint source/channel coding approach, WaveVideo offers
a high degree of error tolerance on noisy channels, still being competitive
in terms of compression. Adaptation to channel conditions and user requirements
is implemented on three levels. The coding itself features spatial and temporal
measures to conceal transmission errors. Additionally, the amount of introduced
error-control information is controlled by feedback. The video stream coding,
applied to multicast capable networks, can serve different user needs efficiently
at the same time by scaling the video stream in the network according to receivers'
quality requirements. The WaveVideo architecture is unique in term of its
capability to use QoS mapping and adaptation functions across all network
nodes providing the same uniform interface.
Keywords: Video compression, wireless video, mobile and wireless networks,
error-control, QoS mapping, QoS adaptation, media scaling, filtering, multicast.
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The WaveVideo System and Network Architecture: Design and Implementation
George Fankhauser, Marcel Dasen, Nathalie Weiler, Bernhard Plattner,
Burkhard Stiller
TIK Technical Report No. 44, June 1998
Extended version of the ACM Monet paper on WaveVideo.
Available as PDF-file.