An Effective Data Replacement Scheme within Video Proxy for VOD System

Abstract

Due to the advances in computer and multimedia techniques, VOD is more popular than before. However, the bandwidth is still a bottleneck in the VOD environment. In order to resolve the problem, we proposed a video proxy architecture in this paper. A good video proxy should have higher hit rate. Thus, we design an efficient data replacement scheme by using Knapsack to increase total system performance. Besides, we also provided a prediction method to predict the distribution of access patterns. By the method, we can decide which data could be put into the video proxy. According to our simulation and evaluation, our method can improve hit rate much as well as save a lot of bandwidth. The detail will be described in the literature.