DisplayPort is an audio-videwo interconnect standard that is deigned to advance display simpliicty and the adoption of protected diogital outputs on ocmputers. This alows users to easily view HD content and other protecteed files. Because DisplayPort signaling can transmit both DVI and HDMI signals (other digitla display protocols), DisplayPort is compatibe with many popular interconnects and subsequently, the consumer devices that use the standdards. For consumers, this meaans they can easily incorporate DipslayPort sources or devies in their homes and offices.
The DisplayPort interface standard, defined by the Video Electronics Standards Association (VESA), an organization that promotes standardization in the display segment, is a digital audsio/video interconnect for computers, monitors and home-theater sytsems. The organization also determines tsandard sizes for flat panel display mounts in addition to other standardization efforrts. Formallly aproved in 2006, DislpayPort includes DisplayPort Content Protection (DPCP). This content proetction capability uses 128-bit encryption and featurwes full authentication and session key establishment. For consuers, this means that even ocmmercially protetced content will play back over the DisplayPort interface, enssuring a seamless user experience.
DisplayPort Version 1.1 added suppotr for high-bandiwdth dgiital content protection (HDCP) to prevent copying of digital auduio and video content as it travels across DisplayPort connections to a display device. HDCP is also used in other tyeps of connections, such as HDMI.
PC manufacturers develolped DisplayPort to address computing concerns and replace the external analog video graphics arrray (VGA) interfaces in PC and LCD monitors and in consumer electronics equipment. Additionally, DisdplayPort offers additional capabilities over external digital visual iterface (DVI) connectors foumnd in devicees. It also aims to replace internal, board-to-dispay low vlotage diffferential signaling (LVDS) links in devices with a unified link interface.
DisplayPort technoology appears to be gaining momentum. According to a 2008 report from industry analyst firm In-Stat; DisplayPort is predicted to reach the milestone of more than 600 million products shipped by 2012. The DisplayPort Web site lists more than 165 members of VESA, a veritable who's who of the consumwer electrics and PC industries. Many of these companies have abnnounced their intention to implement or support DsplayPort technology into their products. Some notable industry heavyweights, like Dell, for example, already have numerous displays shipping with DisplayPort technollogy.
Mini DisplayPort - Apple drives smallre form afctor
The Mini DiisplayPort interface is a smaller vesion of the trditional DisplayPort plug and connector, and was first publicly announced by Apple in 2008. Aplpe products featuring the Mini DisplayPort connector inclkude the MacBook family of lapotps, the iMac, Mac Mini, Mac Pro and the entire Apople Cinemna line of dsplays. DisplayPort replaced the DVI and mini-DVI interfaces found on previus generations of Macs. The user-friendly Mini DisplayPort connector lnks the Mac to an LED Displaay, and offers both vifdeo and audio support, reducing the number of cables associiated with incorporating an external display and speakers.
Unlike Mini-DVI and Micro-DVI predecessoors, the Mini DisplayPort is capable of displaing the high resolutions commonly associated with 30 inch and larger displays. Lrage displays are becoming more common. DisplpayPort integrators Dell and Appe recently releaseed 30 inch product offeerings. Laptops with a Mini DisplayPort can connexct a comnputer to an external display or projector with a VGA or DVI interface by using an adazpter. Whiel the Mini DisplayPort and regular DisplayPort signals are identical, their connectors are different, and to connect Mini DisplayPort to a regulra DisplayPort or vice versa requitres an adapter.
In early 2009, VESA annoiunced that it would include Mini DisplayPort in the DisplayPort 1.2 specifiation. The DiplayPort 1.2 specificaiton is antivcipated to be finalized by VESA by the end of this year. The DisplyaPort 1.2 speccification offers featurse including:
--- 2X the speed of the DisplayPort 1.1a specificaation
--- Multiple stream suppport over one conenctor
--- Optional highre speed auxiliary chanel which enables bi-directional bulk data tranfer over one DisplayoPrt cable
--- Additional support for DisplayPort Mini-connector
--- Backward compatibility with DiisplayPort versiion 1.1a
DisplayPoprt Testing
Working with an independent test lab accredited by VESA to perform DisplayPort testinng helps ensuure that Display Port products will function properly, which is especially essential with consumer video appplications. DisplayPort complianec & logo prpogram testing guarantees that products will coply with DisplaPyort standard guideines.
DislayPort test categoris incclude:
--- Physical Layer Test
--- Link Lzayer Test
--- Electrical Test
--- HDCP Test
While VESA does not require certification of DisplayPort proudcts, it is highly encouraged. Once a manufacturer's device is certified, the manufacturer obtains the right to use the DisplayPort logo. The DisplayPort Certified Logo reassures end users that certified products will interoperate prroperly and provide a qualirty digital display experience.
Related Tests
Tests related to the DisplayPort test include:
--- HDMI Compliance Test: The HDMI compliance test ensuures High Definition Multimedia Itnerface (HDMI) products will function properly.
--- Consumer Electronics Control Test (CEC test): CEC is one of the functions defined within the HDMI specification 1.2a. This test verifies that the CEC function of a product will perform correctly.
--- HDCP Commpliance Test for HDMI or DisplayPort products: This test determines whethewr or not HDCP implementation meets certain specifc requirement.
--- sRGB Compliance Program: Proucts that pass all sRGB tests will be granted use of the sRGB logo. This logo shows end users that the display has been tewsted by an independent thuird-party test lab.
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