In May, VESA announced the DisplayPort development program by a group of industry-leading companies dedicated to creating a new digital display interface specification for broad application within computer monitors, TV displays, projectors, PCs and other sources of image content.

    "The plan in May was to submit a comprehensive version of the interface proposal to VESA during the third quarter for ratification and adoption," said Ian Miller, chairman of VESA. "The group has met its internal timetable and delivered to us a very comprehensive specification, which VESA will now administer and provide a forum for future revisions."

    DisplayPort allows high quality audio to be available to the display device over the same cable as the video signal. It delivers true plug-and-play with robust interoperability, and is cost-competitive with existing digital display interconnects. Designed to be available throughout the industry as an open, extensible standard, DisplayPort is expected to accelerate adoption of protected digital outputs on PCs to support viewing high definition and other types of protected content through an optional content protection capability, while enabling higher levels of display performance.

    DisplayPort enables a common interface approach across both internal connections, such as interfaces within a PC or monitor, and external display connections, including interfaces between a PC and monitor or projector, between a PC and TV or between a device such as DVD player and TV display. The standard includes an optional digital audio capability so high definition digital audio and video can be streamed over the interface, and it provides performance scalability so the next generation of displays can feature higher color depths, refresh rates, and display resolutions. It also features a small, user-friendly connector optimized for use on thin profile notebooks in addition to allowing multiple connectors on a graphics card.

    Layered, Modular Architecture Includes Main Link and Auxiliary Channel

    DisplayPort incorporates a Main Link, a high-bandwidth, low-latency, unidirectional connection supporting isochronous stream transport. One stream video with associated audio is supported in Version.1.0, but DisplayPort is seamlessly extensible, enabling support of multiple video streams. Version 1.0 also includes an Auxiliary Channel to provide consistent-bandwidth, low-latency, bi-directional connectivity with Main Link management, and device control based on VESA's E-DDC, E-EDID, DDC/CI and MCCS standards. The Link configuration enables true "Plug-and-Play."

    The Main Link bandwidth enables data transfer at up to 10.8 Gbits/second using a total of four lanes.

    The promoter group based their development efforts on the premise that the PC industry requires a ubiquitous digital interface with optional content protection that can be deployed widely at minimum cost to enable broad access to premium content, according to Miller.

    As higher performance display and source technologies are introduced, the demands on interface bandwidth expand and the problem will become even more acute soon with demands for more colors, higher resolutions, and higher refresh rates. The DisplayPort standard's high initial bandwidth is designed to scale to even higher bandwidths to accommodate future display requirements.