Information AboutDisplayport |
| CATEGORIES ABOUT DISPLAYPORT | |
| digital display connectors | |
| vesa | |
DisplayPort is a new digital display interface standard (approved May 2006, current version 1.1 approved on April 2 2007 ) put forth by the Video Electronics Standards Association ( VESA ). It defines a new license-free state-of-the-art digital audio/video interconnect, intended to be used primarily between a computer and its Display Monitor , or a computer and a home-theater system. OVERVIEW The DisplayPort connector supports 1 to 4 data pairs in a Main Link that also carries audio and clock signals, each with a transfer rate of 1.62 or 2.7 Gigabits Per Second (Gbit/s). The Video signal path supports 6 to 16 bit per Color Channel . A bi-directional auxiliary channel runs at a constant 1 Megabit Per Second , and serves as Main Link management and device control using VESA EDID and VESA MCCS standards. The Video signal is not compatible with DVI or HDMI , but the specification will allow pass-through of these signals. DisplayPort supports full bandwidth transmission over 3 Meter (10 ft) cable, and a maximum of 1080p resolution at 24bpp, 50/60 Hz over a 15 meter cable. DisplayPort includes optional DPCP (DisplayPort Content Protection) copy-protection from AMD , which uses 128-bit AES encryption, with modern cryptography ciphers. It also features full authentication and session key establishment (each encryption session is independent). There is an independent revocation system. This portion of the standard is licensed separately. It also adds support for verifying the proximity of the receiver and transmitter, a technique intended to ensure users are not bypassing content protection system to send data out to distant, unauthorized users. DisplayPort is a competitor to the HDMI connector (with HDCP copy-protection), the De Facto digital connection for high-definition consumer electronics devices. Another competitor is Unified Display Interface ,1 a low cost compatible alternative to HDMI and DVI. However, the main supporter of UDI, Intel , has stopped the development of the technology and now supports DisplayPort. Newly featured in version 1.1 is the support of HDCP content protection and support for Fiber Optic cables as an alternative to Copper , allowing a much longer reach between source and display without image degradation.2 Revision 2.0 is planned for later release. Before being acquired by AMD , one of the supporters, ATI reported that they were expecting DisplayPort products in early 2007. The AMD/ATI merger completed July 2006 might have postponed the availability of DisplayPort products somewhat, but it seems as though AMD has decided to use DisplayPort as the standard port for its Fusion processor platform, and upcoming mobile platforms after 2008 as AMD announced that they will introduce their first DisplayPort products in late 2007 as a part of their forthcoming platforms for mainstream on December 15 2006 . On July 25 , 2007 , at AMD's Technology Analyst Day 2007, AMD renewed their commitment to supporting DisplayPort. Genesis Microchip also announced DisplayPort products to be available in 20073, as did Samsung 4. A concept monitor by Dell implementing DisplayPort was demonstrated early May 2007.5 SUPPORTERS There are several companies stated to support DisplayPort: AMD , Intel , Dell , Genesis Microchip , Hewlett-Packard , Lenovo , Molex , NVIDIA , Philips , Samsung , Analogix , and Tyco Electronics . COMPLIANCE TESTING VESA has selected four internationally-known organizations – Allion Test Lab, Inc., Contech Research, ETC, and NTS for compliance testing with emerging DisplayPort standard. TECHNICAL SPECIFICATIONS
The specifications can be downloaded at vesa.org with free registration . † 70fps × 24bpp × 2560 × 1600 = 6.9 Gbit/s, not taking into account blanking. SEE ALSO REFERENCES EXTERNAL LINKS
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