實現VoD的方法有很多種其中一種是採用unicast 的方式傳送資料，其優點為易於實現互動式功能，且等待時間短。但同時提供多個使用者頻寬耗費大，故後來研究採用multicast傳輸資料，以資料共享降低頻寬需求，segment based 廣播法即為其中之一，其特徵為將影片作適當切割並依演算法安置於頻道上，但此法不容易支援互動式功能。本篇論文旨在討論使用segment based廣播法如何提供互動式的功能。假設client端的buffer足夠大到將整部影片資料暫存起來，因此倒轉，及暫停便不再需要額外頻寬，並且假設使用者執行快轉及跳躍(jump)不會造成任何延遲，而執行快轉及跳躍時，由於可能有資料尚未收到buffer中，而且為了配合segment based廣播法，我們將發生快轉及跳躍的播放做一個與segment based廣播法對齊的動作，如此可以使快轉時更流暢，且執行快轉和跳躍時所需的額外頻寬更容易共享。最後我們將此法套用於相關的segment based廣播法上如PB，NPB，RFS進行模擬，測量執行快轉及跳躍時的blocking 機率和所需額外頻寬。我們發現，快速廣播法套用段落對齊法有較低的blocking機率以及較少的額外頻寬需求，而新巴格達廣播法套用段落對齊法有較高的blocking機率及較多的額外頻寬需求。我們推測造成此結果的原因為segment的大小以及segment重覆的週期。

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