Improved downstream rate-distortion performance of SHVC in DASH using sub-layer-selective interlayer prediction

摘要

Dynamic Adaptive Streaming over HTTP (DASH) has gained wide acceptance due to its ability of bitrate adaptation in diverse network conditions. In the meanwhile, it is asserted that the Scalable Extension (SHVC) of High Efficiency Video Coding (HEVC) can bring more efficient storage and caching compared with traditional single-layer video coding. However, using of SHVC in DASH raises the downstream bitrate relative to encoding each representation independently. This paper proposes a method to improve the downstream rate-distortion performance of SHVC in DASH. Experimental results show that the proposed method can bring up to 16.9 %-unit downstream bitrate reduction compared with directly use SHVC in DASH, while the efficiency in storage space is maintained.