A Study on the Method to Reduce Data Transfer in Multi-Quality VOD Service

Abstract

In the VOD service, the low resolution video data is expected for content searching, and the hi resolution video data is expected for browsing. In our previous studies, we presented the effect of scalability encoding in cache utilization. In this study, we report comprehensive experiments on cases of various updating procedures, and the effects of differencial data transfering. As a result, if a time-cycle of downloading, transcoding and browsing is too short for all clients to download contents within, the scalability encoding method can improve the quality of service, in both of data size and consumed time.