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About DisplayPort standard
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| Updated：2010.05.15 Source：SHENZHEN HOUQUN SCIENCE & TECHNOLOGY DEVELOPMENT CO.,LTD. Clicks： |
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Video Electronics Standards Association (VESA) announced a DisplayPort display interface standard of the final version: DisplayPort 1.0. Successor as DVI, DisplayPort will transmit video signals in high definition, while adding support for audio signal transmission, while supporting a higher resolution and refresh rate.
By design, DisplayPort supports both external display connections, and also supports built-in display connectivity. Notebook manufacturers want to use VESA DisplayPort to connect not only independent monitors can also use it to directly connect LCD screen and motherboard, convenient notebook upgrade. To this end, DisplayPort interface is also designed to be very compact, convenient laptop use, but also allows the card to configure multiple interfaces.
Support the DisplayPort 1.0 specification single, one-way, four-line connection, data transfer rate 10.8Gbps, enough to send uncompressed video and associated audio, and also support the 1Mbps bidirectional auxiliary channel for equipment control purposes, in addition to 8 bit and 10 bit color. In data transmission, DisplayPort uses "micro-packetised" format. VESA said, DisplayPort has a high degree of scalability, you can keep adding more new content coming. And consumer electronics areas like HDCP, DisplayPort can also be achieved through the 128-bit AES encryption on the HD video data of the copy protection. In fact, VESA also close watch on the consumer electronics market, claiming that DisplayPort can also easily connect TV, DVD players and other devices.
VESA about a year ago began developing DisplayPort, and soon after, in particular interest groups (SIG) proposed a UDI (Universal Display Interface), can be compatible with HDMI and DVI, DisplayPort and this is lacking. However, UDI does have a HDMI support HDCP anti-piracy system, but just like DVI, or HDMI, and like DisplayPort, it does not support the audio signal transmission. UDI 1.0 is expected to be completed this quarter.
DisplayPort's supporters are Dell, HP, Lenovo, Philips, ATi, etc., UDI has been Intel, LG, Apple, National Semiconductor, etc. support, nVIDIA and Samsung will also support DisplayPort and UDI
DisplayPort in 2008 the situation:
Organizational development DisplayPort interface standard VESA (Video Electronics Standards Organization) in 2008, has participated in the world's largest Consumer Electronics Show (CES2008), and detailed at the show introduces the next generation display device interface - DisplayPort 1.1 in the relevant situation. In fact as early as May 2006, VESA on the dissemination of Displayport 1.0 standard, which is a for all display devices (including internal and external interfaces) and open standards, and in CES08 on, VESA announced the DisplayPort has been updated now to 1.1 version, and made detailed reports and presentations.
This new DisplayPort interface on almost all personal computer manufacturers and graphics card manufacturers have expressed support for Japan's dell has been pioneered in December 2007 to support DisplayPort interface monitors - Dell 3008, and have been sold in Japan Open . With the CES08 the publicity can be expected in 2008 DisplayPort interface specifications will prevail.
Meeting, DisplayPort important person in charge, Dell's Bruce Montag to the current DisplayPort 1.1 specification introduced in detail, as well as DisplayPort market outlook for the future are described. First of all, said Bruce Montag, DisplayPort interface can be the perfect support for HDCP digital content protection protocol, and can simultaneously transmit audio and video, real solutions to achieve high definition Smart Call.
From a performance sense, DisplayPort 1.1 maximum support 10.8Gb / S transmission bandwidth, but the latest HDMI 1.3 standard is only supported 10.2G / s of bandwidth; addition, DisplayPort can support WQXGA + (2560 × 1600), QXGA (2048 × 1536) such as resolution and 30/36bit (each primary color 10/12bit) color depth, 1920 × 1200 resolution, color support to 120/24Bit, ultra-high bandwidth and resolution enough to adapt to the development of display devices.
On the difference between DisplayPort and HDMI, Bruce Montag said, HDMI was first drawn up specifications for CRT, both HDMI or the "twins" UDI (in essence, remove the HDMI audio transmission), both inherited The core technology DVI TMDS, essentially is still a DVI extension. DVI, HDMI, UDI's video content in real-time, dedicated approach to transmission, which can ensure video traffic flow blockage phenomenon will not occur. The DisplayPort is a start for the development of liquid crystal displays, using "Micro-Packet Architecture (micro-packet architecture)" delivery architecture, the video content to packet transmission, this point with DVI, HDMI and other video transmission technology has a significant difference. In other words, HDMI replacing analog models the emergence of video, and the emergence of DisplayPort will replace DVI and VGA interfaces are.
Although the micro-packet transmission structure DisplayPort, but the ultra-high bandwidth absolute Buzhi Yu appears in the transmission process, "Diaobao" phenomenon; and micro-packet architecture is another feature of elastic, so you can easily split screen DisplayPort display (a maximum DisplayPort cable support six 1080i or 1080p video streams 3.), DisplayPort can be the same set of Lane / Link (channel / connection) transmission within groups of videos, all of this is given to micro-packet architecture force. Switched transmission using DVI, HDMI and other video can be transmitted in a group of Link a video.
In addition, DisplayPort also a two-way communication enables the external channel, transmission speed more than 1Mbps, can be used directly as voice, video and other low-bandwidth data transmission channel, also can be used without delay of the game equipment.
Bruce Montag said, HDMI is DVI evolved on the basis that they are using the TMDS signal transmission technology, digital image transmission former model must be converted into TMDS TMDS circuit model. The DisplayPort is achieved directly integrated with the panel, you can directly drive panel, which can greatly simplify the LVDS circuit, and no longer need to TMDS circuit; such benefits to not only save cost, save the liquid crystal display space to for Developers a lighter, thinner liquid crystal display products. Also, DisplayPort uses an asymmetric design, with lock function to prevent the user interface plug mistake to avoid because of misuse leading to hardware damage.
For future development, Bruce Montag, said the next displayPort interfaces may be achieved as common as USB communication, but he stressed this is only his personal conjecture.
DisplayPort interfaces will be the future of the main display interface standards, will completely replace the current DVI and VGA, or HDMI. Compared with the most advanced HDMI, for, DisplayPort has more advantages and greater bandwidth, and from the scalability and peripheral compatibility, much stronger than the HDMI interface; costs, DisplayPort not only can directly drive panel, save a lot of circuit cost and space, and the standard fully open, does not need to pay, such as HDMI interface, the copyright fee involved. We expect that by the end of 2008 or in 2009, DisplayPort will move toward the most peak stage.
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