We noticed the word "D-terminal" in catalogues for recently released TV sets. A "D-terminal" is a digital broadcast signal connector which joins a digital satellite broadcast tuner and a TV set.

D-terminals, which the EIAJ (Electronic Industry Association of Japan) provided, were adopted for use in digital satellite broadcast tuners. A strong point of D-terminals is that they include video signals (Y, Po, Pr) and control signals which are able to distinguish a video signal format, allowing only one necessary connector to hook up.
TV receivers currently have two systems; a present standard television (SDTV) receiver and a Hi-Vision (HDTV) receiver. There is also a variety in TV sets, in the number of scanning lines and scanning format. For this, D-terminals are provided which are compatible to each visual signal format.
TV sets which are not equipped with D-terminals should be connected to a S-terminal for standard video signal (480i) and to a Component terminal for Hi-Vision video signal(1080i) .