Give legacy sources a fresh lease on life. In addition to full 4K Ultra HD, HDR (High Dynamic Range), BT.2020, Wide Color Gamut, and 4:4:4 Pure Color sub-sampling, the AVR-X550BT has an advanced HDMI section with five inputs that supports 21:9 and 3D video pass-through, Dolby Vision compatibility, and HLG (Hybrid Log-Gamma) pass-through. Three inputs are compatible with HDCP 2.2 for copy-protected content.