Improved Two-Layer backward-compatible HDR video coding: A performance comparison with Single-Layer HLG

Two-Layer HDR video coding based on an adaptive residual mapping with extension layer coding performance optimized for HEVC is proposed in this paper. The proposed solution, while maintaining backward-compatibility, outperforms the state-of-the art Single-Layer HLG broadcast pipeline achieving higher HDR quality in terms of both HDR-VDP-2.2 and HDR-VQM along with acceptable LDR quality in the base layer.