__ is a component video technology that, in its basic form, combines the two chroma signals into one, resulting in video quality not quite as high as that of YPbPr. This is because the R, G, and B signals are harder to approximate after the Pb and Pr signals have been combined. __ connector, is a 7-pin mini-DIN, mini-DIN of various pin counts being the most common connector type. The most basic connector is a 4-pin mini-DIN that has, quite simply, one luma and one chroma output lead and a ground for each. A 4-pin male connector is compatible with a 7-pin female connector, both in fit and pin functionality. The converse is not also true, however. The 6-pin and 7-pin versions add composite video leads, which are discussed next. Some 7-pin ports use the extra pins to provide full Y, Pb, and Pr leads with four ground leads, making those implementations of __ equivalent to component video. ATI has used 8-, 9-, and 10-pin versions of the connector that include such added features as an S-video input path in addition to output (from the perspective of the video source), bidirectional pin functionality, and audio input/output.