An Inter-Layer Protection Scheme with Block-Based Interleaving for MPEG-DASH over WiFi Multicast

摘要

To facilitate the distribution of video contents, MPEG-DASH (Dynamic Streaming over HTTP) standard is developed to provide standardized manifest format, content format and streaming protocol for adaptive streaming, thereby increasing interoperability of Internet TV services. Although DASH contents are delivered by HTTP without supporting data multicast, some studies shows the possibility of delivering DASH contents over multicast channels for better service scalability or service quality. These studies usually employ scalable videos (e.g., SVC videos) to support efficient adaptive streaming. In this paper, we try to improve the error protection capability for delivering SVC videos by using layer-aware FEC (L-FEC). We apply two conventional L-FEC schemes and found that the improvement in the construction using multiple multicast groups is quite limited. Therefore, we propose a new inter-layer protection scheme with block-based interleaving to improve the performance. We also evaluate the performance of the proposed scheme and compare it with other schemes over real WiFi networks. The result shows that the proposed scheme can improve the source block recovery rate by 0.47%~2.42% when employed in multiple multicast group construction.