Unified Display Interface
The Unified Display Interface ( UDI ) was supposed to replace the VGA connection introduced in 1986 . It should be compatible with the digital DVI connection, also transmit audio data and - like the DVI-compatible HDMI - support HDCP signal encryption .
With 16 Gbit / s, UDI should offer about three times the bandwidth of DVI (5 Gbit / s), which would have enabled screen resolutions of up to about 3840 × 2400 pixels at 60 Hz refresh rate and 8 bit resolution per color component. A digital audio transmission was optionally available for applications in entertainment electronics , which can be omitted for pure PC applications. For this, an HDMI license must be purchased from the device manufacturer, and the user needs a special adapter cable from UDI to HDMI.
UDI should also be used for device-internal video connections, e.g. B. be used between the display controller and the panel , for which a special functional profile should be used. The electrical interface specification should be based on PCI Express . In addition, an event-controlled return channel had been provided and a new, compact connector was to be used. The final specification was published in July 2006. The greatest possible compatibility between UDI and HDMI was ensured.
Because Samsung and Intel ended their support for UDI at CES 2007 and Apple in October 2008, the standard is unlikely to become more widespread, especially since the competition DisplayPort was declared a VESA standard. The website of the UDI Special Interest Group also ceased to exist in early 2008.
Alternative multimedia interfaces
- SDI (Serial Digital Interface) - video image transmission including audio in studios
- HDSDI (High Definition Serial Digital Interface) - video image transmission including audio in studios
- DVI (Digital Visual Interface) - first successful digital interface for computer screens without audio (encryption optional), in the DVI-A and DVI-I versions also suitable for analog monitor connection (downwards compatible with VGA)
- HDMI (High Definition Multimedia Interface) - extended for video (in addition to image and audio data as well as encryption and alternative video modes), purely digital, including DVI compatibility mode
- DisplayPort - license-free connection standard for the transmission of video and image content, with an additional AUX channel
- MHL (Mobile High-Definition Link) - HD video and audio interface, optimized for connecting mobile phones and portable devices to HDTVs