A power- and storage-efficient HLS media server for multi-bitrate VOD services

The growth of social media and mobile service, and the diversity of client devices have greatly increased media servers' storage costs and network traffic. This paper proposes an HTTP live streaming (HLS) media server for multi-bitrate video-on-demand (VOD) services that is efficient in terms of power consumption and storage space. The proposed server provides efficient storage space management by taking into account the user's video streaming patterns and by exploiting real-time transcoding. The experiment results show that the proposed server yields an enhanced storage efficiency compared to the previous HLS media server. The proposed HLS media server can decrease storage space by 25% when the distribution of video qualities requested by users is in the form of a normal distribution, and by 30% when it is a Pareto distribution. Improved storage efficiency also leads to improved power efficiency. The proposed HLS media server reduces the required power consumption by 9.9%.