HDMI and DVI-D are two standards for the transmission of digital image signals, each with different protocols, but in part the same type of conductor which, among other things, also makes them compatible with each other. The difference is primarily that DVI is a computer monitor standard and not prepared for sound transfer. The DVI protocol is somewhat more sensitive to noise and therefore cannot cope with as long cables as HDMI. HDMI is a newer standard and designed for multimedia transmission and the protocol therefore has more options and control signals than DVI.