The BDS 280/580 or 280S/580S can upscale video signals from its internal drive to UHD format, both DVD and Blu-ray discs. The 280/580 or 280S/580S have pass-through function on the HDMI inputs. They will not upscale standard format or normal HD format video signals that are fed to the HDMI inputs of the 280/580 or 280S/580S. However, 4K or UHD video signals will pass through the BDS directly to the TV screen without processing, as will HD and SD format video. (Bear in mind that this high resolution makes it even more important to use high-quality HDMI cables, especially if they must be several meters long.)