Abstract— In “Animated Spaces” real-world objects can
communicate with users in order to convey their purpose,
function, and history. Achieving the vision of animated spaces
will require adaptive streaming and delivery of video to mobile
users. In this paper, we specify the technical requirements of
such an animated space and use RFID technology to develop
smart objects. We present an architecture for adaptive delivery
of stored MPEG-4 encoded audio-visual information with
varying wireless network conditions and client device
capabilities. The proposed architecture is developed under
constraints imposed by user preferences and multimedia content,
to ensure smooth delivery of multimedia contents to mobile users.
We implement a pilot implementation of this concept using RFID
technology and evaluate it over a real network testbed.
Index Terms—Adaptive Multimedia, Information Systems,
ITH the rise of unprecedented new technologies (e.g.,
smart homes, shop-bots, pedagogical agents, wearable
computers, personal robots, multi-agent systems, sensors,
grids, knowledge environments) and their increasing ubiquity
in our social and economic lives, ubiquitous computing offers
a means to create “Animated Spaces” for users through their
mobile devices (laptops, PDAs, mobile phones, etc.). In
Animated Spaces, real-world objects can communicate with
users in order to convey their purpose, function, and history. It
can be used to provide location-aware information services, to
support learning through design experiences , ,  and
cultivate interests and emergent community . The vision of
putting information in places has been a key goal of
researchers developing augmented reality systems , , .
Information exchange through streaming video is a vital part
of animated space architecture envisioned in this paper.
Manuscript received June25, 2004. This project was supported in part by
the following grants: NSF-ANI-0319871, NSF-