In this paper, we propose two structures for scalable video coding (SVC) based on HEVC. Several inter-layer prediction mechanisms are introduced to improve coding efficiency of the proposed HEVC-based SVC. The proposed inter-layer predictions are developed on single-loop and multi-loop decoding structures. We found that the proposed SVC is able to decrease average bitrates of enhancement layers by about 10.2% for the all-intra case, and 7.4% for the random access case, compared with single layer coding with no inter-layer prediction in multi-loop decoding. In addition, the single-loop decoding with the proposed inter-layer predictions achieves coding gains of 10.2% for the all-intra case, and 2.6% for the random access case.
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