| Summary: | 碩士 === 國立臺灣大學 === 資訊工程學研究所 === 84 === It has been an active research topic providing smooth
playback capabilities for video-on-demand(VOD) systems. From
a user's perspective, interactive VCR functions like fast
forward and backward operations are desirable. A VOD system
with such features is called an interactive VOD systems.
This thesis discusses the implementation of a scheme to
support the interactive operations for VOD systems. The
implementation assumes video data is stored in the MPEG
format. During the normal playback, all frames, I-frames,
P-frames, and B-frames, are played. During the fast forward
and backward operations, only I-frames are plaued. For
supporting interactive operations, separate video files
containing only I-frames are generated in advance. Though
this scheme costs extra disk space, the video server
performance is highly improved. In addition, the video server
does not need to differentiate the video files containing only
I-frames and the regular MPEG files. As a result, the support of
interactive operations incurs no special designs.
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