Harmonic broadcasting for video-on-demand service
Li-Shen Juhn; Li-Ming Tseng
Broadcasting, IEEE Transactions on
Volume 43, Issue 3, Sep 1997 Page(s):268 - 271
Digital Object Identifier   10.1109/11.632927
Summary:Using conventional broadcasting, if we want to support a 120-minute popular movie every 10 minutes, we need 12 video channels. Assuming the set-top box at the client end can buffer portions of the playing video on a disk, pyramid broadcasting schemes can reduce the bandwidth requirements to 5.7 channels. We present a new scheme which only needs 3.2 channels. For a movie with length D minutes, if we want to reduce the viewer waiting time to D/N minutes, we only need to allocate H(N) video channels to broadcast the movie periodically, where H(N) is the harmonic number of N, H(N)=1+1/2+…+1/N. In order to support video-on-demand service for a popular movie, the new scheme greatly reduces the bandwidth requirements

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