| Summary: | 碩士 === 國立交通大學 === 資訊工程研究所 === 83 === In video on demand (VOD), videos are stored on a video server
in order to provide a number of customers to be able to view
movies at homes simultaneously from a server, and the real-time
services like the VCR functions. The requirements of designing
a video server for VOD are the high throughput of retrieval
system and efficient management of network bandwidth. We
propose an architecture of video server Diverging Video Server
(DVS), which applies the hierarchical management mechanism to
gain the service management. The file system has been isolated
from operating system, and diverged to an integral and
independent system, so that it can simplify the overhead of
file management in operating system. The techniques of
parallel processing and pipe-lining are used to advance the
system throughput and performance. Video frames can be
transferred directly from disk processors to clients. To
ensure this constrain, we formulate an admission control
algorithm to examine each new client's request to coincide this
requirement. A prototype of the DVS has been built. By
observing the evaluation result, the proposed architecture of
video server can serve the numbers of clients simultaneously
more than the other PC-based video server.
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