movies and music, have acquired more attention in addition to the recent popularity of digital broadcasting including terrestrial digital TV broadcasting and digital radio broadcasting. Generally, servers tend to…
In certain CS and BS digital broadcasts, one popular movie title is repeatedly put on air almost daily so that the users may watch the image seamlessly from the start till end whenever they want. This has contributed to the popularization of near-on-demand system. Meanwhile, it has become more important for the clients given the continuous media data can be run seamlessly from start till end, and therefore various methods to broadcast continuous media data under the division based broadcasting scheme have been studied widely. In the division based broadcasting scheme, data is divided into several segments and broadcast via multiple channels. Broadcasting the forepart of data repeatedly in a channel increases the clients’ likelihood of watching the data, and the waiting time is reduced accordingly.
These methods calculate the appropriate channel bandwidths and allocate them to each channel. However, in many broadcasting systems, each channel bandwidth is fixed for the reason of transmission scheme. In case bandwidth of each channel of a broadcasting system and the bandwidth calculated in conventional techniques differ from each other, the waiting time is not reduced effectively. For instance, there are thirteen 1.79 Mbps channels called segments for terrestrial digital TV broadcasting, each four of which together broadcast a high-bit rate image while the other segment alone broadcasts a low-bit rate image (one-segment broadcasting). For digital radio broadcasting, there are eight 300 kbps segments, three of which form a channel (three-segment broadcasting), while the others are used for audio broadcast. As described above, the scheme commonly employed is the one that uses multiple channels with fixed bandwidths to broadcast one image.
In this paper, a method under the division based broadcasting scheme considering the channel bandwidths has been proposed, that divides the data into several segments, so that the clients can ...
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