VESA introduces DisplayPort v1.2 – double performance
The Video Electronics Standard Association (VESA) has unveiled the long awaited DisplayPort Version1.2 digital display interface that brings with it a host of enhanced features. Aside from a doubled data rate of 21.6Gbps and bi-directional USB data transfer of an impressive 720Mbps, the upgrade also offers multi-monitor support from a single plug, improved audio synchronization and support for Full HD 3D Stereoscopic displays.
DisplayPort v1.2 was designed to be compatible with existing DisplayPort systems and cables. To take advantage of the new capabilities, a PC will need to be DisplayPort v1.2 enabled. However, existing standard cables can still be used, including those with the new Mini DisplayPort connector. To achieve the 21.6 Gbps rate, the per-lane data rate is doubled from 2.7 Gbps to 5.4 Gbps, over the four lanes that exist in the standard cable. For a single display, this enables up to 3840 x 2400 resolution at 60Hz, or a 3D display (120Hz) at 2560 x 1600.
DisplayPort v1.2 supports “multi-streaming”. the ability to transport multiple independent uncompressed display and audio streams over a single cable, supporting protected content and high performance applications such as 3D gaming. This enables the use of multiple monitors connected by cable in a daisy chain or hub configuration. Whereas the current Display v1.1a standard can support one 2560 x 1600 monitor at 60Hz, DisplayPort v1.2 can support two such monitors with one cable, or four 1920 x 1200 monitors. Many other combinations are possible, including multiple video sources, multiple displays (even at different resolutions) and multiple audio speakers.
Another new feature is the ability to support high-speed, bi-directional data transfer, allowing USB 2.0 or Ethernet data to be carried within a standard DisplayPort cable. For DisplayPort v1.2, the maximum data rate of this “AUX” channel has been increased from 1 Mbps (Mega-bit-per-second) to 720 Mbps, providing suitable bandwidth for USB 2.0. The DisplayPort cable can therefore support USB data to/from the display to support Display USB functions, in addition to sending the video and audio information. Standard Ethernet and audio data can also be transported in the DisplayPort cable.
DisplayPort v1.2 also includes improved support for Full HD 3D Stereoscopic displays. It is able to provide life-like motion using up to 240 frames-per-second in full HD (providing 120 frames-per-second for each eye), 3D Stereo transmission format support (field sequential, side by side, pixel interleaved, dual interface, and stacked) and 3D Stereo display capability declaration Mono, Stereo, 3D Glasses
“DisplayPort is a truly open, flexible, extensible multimedia interconnect standard that is ubiquitous in the PC, notebook and display markets and is rapidly gaining traction in consumer electronics applications,” said Bill Lempesis, VESA’s executive director. “DisplayPort Version v1.2 offers a complete set of benefits and capabilities that no other standard can provide. It is completely backward compatible with DisplayPort v1.1a and requires no new cables or other equipment, making it the standard of choice across the industry.”