Abstract
The
client-centered multimedia adaptation and delivery system consists of
the
following five subsystems: (1) the video preprocessing subsystem, (2)
the
multiple-level video summarization and hierarchical content
representation
subsystem, (3) the video personalization subsystem, (4) the multiple
client
request aggregation subsystem and (5) the client-side energy-aware
multimedia
streaming subsystem.
The
video preprocessing subsystem performs temporal video segmentation and
indexing
in the temporal domain. A data-driven stochastic modeling approach is
proposed
to perform both video segmentation and video indexing in a single pass
automatically. Indexed video segments
are then fed to the multiple level video summarization and hierarchical
content
representation subsystem to build a visual content database. Each
indexed video
segment is summarized at multiple levels of abstraction. Content-aware
key
frame selection algorithm and motion panorama computation are used to
generate
video summaries for each indexed video segment. In the video
personalization
subsystem, the client video content preference is matched with the
video
summaries stored in the visual content database. In order to generate
the
personalized video summary, the client usage environment and the
client-side
system-level constraints are evaluated. The personalization engine
selects the
optimal subset of video contents that are most relevant to the clients’
preference(s) subject to the constraints imposed by the client. In
order to
utilize the server-end resources efficiently, a multiple-stage client
request
aggregation strategy is designed and implemented to aggregate similar
client
requests together such that the number of requests the multimedia
server needs
to process is reduced. The client-side statistical prediction-based
multimedia
streaming strategy reduces the wireless network interface card (WNIC)
energy
consumption to receive multimedia streams by judiciously transitioning
the WNIC
to a lower power consuming sleep state during the no-data intervals in
the
multimedia stream, without explicit support from the multimedia servers
themselves.
Jung-ha An, Variational Partial Differential Equation (PDE) Models with an Application to Medical Imaging
Risto Atanasov,
Introduction to 2 dimensional topology
May:
Colloquium
Series for 2005-2006
Colloquium Series for 2004-2005
Colloquium Series for 2003-2004
Colloquium Series for 2002-2003
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Last Modified: 23 August 2006