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Thursday, May 04, 2006
DisplayPort Interface Standard Released VESA


The newly-developed DisplayPort interface standard designed to unify the desktop and notebook PC markets to a common high-bandwidth display interface has been approved by the member companies of the Video Electronics Standards Association (VESA).

The new DisplayPort standard was developed by a VESA Task Group comprised of companies in the display silicon, connector, computer monitor, TV display, projector, and PC industry segments. "With support from these major industry players, we expect rapid adoption of DisplayPort in the PC marketplace," according to Bill Lempesis, executive director of VESA. "DisplayPort will reduce platform costs and drive a common digital interface across PC platforms and components."

DisplayPort allows high-definition digital audio to be available to the display device over the same cable as the digital video signal. It delivers plug-and-play, 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 the adoption in PCs of digital outputs enabling higher levels of display performance. When the optional content protection capability is active, DisplayPort will support viewing high definition television, video and other types of protected content.

DisplayPort also enables a common interface for both external and internal display connections within a PC notebook or a desktop display. This approach allows for standardized connections between source devices and display devices, such as LCD panels, without the need for signal translation. DisplayPort may be applied within notebook PCs, and for external display connections, including interfaces between a PC and monitor or projector, between a PC and TV or between a device such as a DVD player and TV display.

The standard includes an optional digital audio capability so high-definition digital audio and video can be sent over the interface.

DisplayPort incorporates a Main Link, a high-bandwidth, low-latency, unidirectional connection supporting isochronous stream transport. One uncompressed video stream with associated audio is included in Version 1.0. DisplayPort is seamlessly enabling support of multiple video and/or audio streams. Version 1.0 also includes an Auxiliary Channel to provide consistent-bandwidth, bi-directional connectivity with Main Link management, and device control based on VESA's EDID and MCCS standards.

The Main Link bandwidth of up to 10.8Gbit/s, equivalent to a data transfer rate of 1080 Mbytes/second, uses four lanes; the auxiliary channel features minimal delay, with maximum transaction periods less than 500 microseconds.

The DisplayPort standard has available an optional content protection system which is designed to meet the high-bandwidth requirements of the current and future requirements of high-definition audio and video digital technology.


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