| Article |
| Type of Publication |
| Recording and Playing Back Interactive Media
Streams |
| Title |
|
|
| Authors |
| IEEE Transactions on Multimedia, 2005 |
| Published in |
| Recording systems and media server for
networked audio and video streams have become an important part
of today's Internet. In contrast to this, only a few recording
and playback solutions currently exist for the data streams of
interactive media applications (e.g., shared whiteboards and
distributed virtual environments). So far these solutions are
application-specific: individual algorithms and implementations
are required for each application that is to be recorded. In this
paper, we are proposing generic algorithms for the recording and
playback of interactive media streams. These algorithms are based
on a common model for the class of interactive media. They enable
full random access to recordings by initializing the replaying
applications with the required state information (e.g., the
current slide in a recorded presentation). We have implemented
these algorithms in the Interactive Media on Demand (IMoD)
system. In order to interpret the semantics of an interactive
media stream, the IMoD system requires that the RTP/I protocol is
used for the framing of the transmitted data. Any application
using RTP/I can be recorded directly using the IMoD system
without any modification. Interactive media streams not using
RTP/I can be recorded using the generic recording algorithms.
However, they require an adaptation of the IMoD system so that it
is able to extract a minimal set of information from the
application-level protocol of these streams. In addition to the
generic recording algorithms, we present the architecture and
major design considerations of the IMoD system and discuss the
experiences gained from recording different interactive media
applications. |
| Abstract |
|
interactive media
recording
random access
media server
|
| Keywords |
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