UDI was primarily backed by Intel with support from Samsung and other partners. In early 2007 Intel started supporting the similar DisplayPort standard, and both Intel and Samsung withdrew from the UDI SIG. There has been no announcements made about UDI since early 2007 and the UDI website is no longer operational.
UDI provides higher bandwidth than its predecessors (up to 16 Gbit/s in its first version, compared to 4.9 Gbit/s for HDMI 1.0) and incorporates a form of digital rights management known as HDCP. The connector has a single row of 26 contacts pitched 0.6 mm apart from each other, looking very similar to the USB plug which has a single row with only four contacts. Three of the 26 contacts will not be wired but are reserved for undetermined future upgrade possibilities. Transmit and receive plugs are slightly different, and a UDI cable will fit only one way. Bidirectional communication works at a much lower data rate than that available for the single direction video datastream.
On December 20, 2005, the UDI Special Interest Group (UDI SIG) was announced. They worked on determining the refined specifications and promoting the interface. Members included Apple Computer, Intel, LG, NVIDIA, Samsung, and Silicon Image Inc. The UDI specification was finalized in July 2006. The differences between UDI and HDMI was kept to a minimum since both specifications were designed for long-term compatibility.