A Novel RFS Broadcasting Scheme for VBR-Encoded Videos

The existing periodic broadcasting schemes mainly support CBR-encoded videos. A modification of recursive frequency-splitting (RFS) scheme, called v-RFS, is presented in this paper to support VBR-encoded videos. In v-RFS, the maximum number and the placement of segments are determined by using the RFS. Then the VBR video is partitioned into a series of segments with equal-length, and these segments are further partitioned into multiple equal-size sub-segments. Finally sub-segments of different segments are multiplexed and transmitted periodically on their channels. The proposed scheme can deliver all segments on time at constant transmission rate. Simulation results indicated that the proposed scheme outperforms RFS and Smooth RFS in improving bandwidth efficiency and reducing client storage.