The term HD compatible has been used in Europe along with the term HD ready to market display devices. However unlike the terms "HD ready" and "HD ready 1080p", which are formally specified by the EICTA (European Information, Communications and Consumer Electronics Technology Industry Associations), the term "HD compatible" is not formally specified and does not guarantee any particular set of features.
Typically, "HD compatible" implies that a display device is capable of taking an HDTV-signal as an input (via analog YPbPr or digital DVI or HDMI), but the HDTV-signal may be downscaled to display at a lower resolution. This downscaled resolution can be less than the SDTV-resolution (e.g. VGA-resolution, 640×480 pixels). The HD ready logo, in contrast, guarantees a specified level of display performance.