VESA releases DisplayPort 2.1 specification
The latest DisplayPort specification brings better alignment with USB Type-C and USB4;
BEAVERTON, Oregon – October 17, 2022 – The Video Electronics Standards Association (VESA®) today announced the release of DisplayPort 2.1, the latest version of the DisplayPort specification, which is backward compatible with and replaces the previous version of DisplayPort (DisplayPort 2.0 ). VESA worked closely with member companies to ensure that products supporting DisplayPort 2.0 would actually meet the newer and more demanding DisplayPort 2.1 specification. Through this effort, all previously certified DisplayPort 2.0 products, including Ultra-high Bit Rate (UHBR)-enabled products – whether GPUs, docking station chips, monitor scalar chips, repeater PHY chips such as re-timers or DP40/DP80 cables (including both passive and active, and using full-size DisplayPort, Mini DisplayPort or USB Type-C connectors) – have already been certified under the stricter DisplayPort 2.1 specification.
Achieving a robust, end-to-end visual user experience remains the top priority of VESA’s DisplayPort specification, whether via native DisplayPort cable, DisplayPort Alt Mode (DisplayPort over USB Type-C connector), or via the USB4 link. As such, DisplayPort 2.1 has strengthened its alignment with the USB Type-C specification as well as the USB4 PHY specification to facilitate a common PHY serving both DisplayPort and USB4. Additionally, DisplayPort 2.1 added a new DisplayPort bandwidth management feature to allow DisplayPort tunneling to coexist more efficiently with other I/O data traffic over the USB4 link. This increased efficiency is in addition to the mandatory support for VESA’s visually lossless Display Stream Compression (DSC) codec and VESA’s panel readback capability. DSC bitstream support can reduce DisplayPort transport bandwidth by over 67% without visual artifacts, while VESA’s Panel Replay feature can reduce DisplayPort tunneling packet transport bandwidth by over 99% when the Panel Replay operation takes place.
“Achieving better alignment between DisplayPort and USB on a common PHY has been a particularly important effort within VESA given the significant overlap in use case patterns between the DisplayPort and USB4 ecosystems. DisplayPort 2.1 converges DisplayPort with USB4 PHY specifications to ensure the highest video performance across a wide range of consumer products. Display transport via DisplayPort, with its higher bitrates and the proven visual quality of DSC compression, even for HDR content, provides sufficient bandwidth for the needs of virtually any practical application. Features such as controlling multiple displays over a single cable or enabling multiple functions on a single port such as video, power and data transfer, no longer require compromise in the choice of video format. The advanced capabilities of the DisplayPort video interface are made possible by the invaluable contributions of our more than 300 member companies across the electronics ecosystem.
— said Alan Kobayashi, Chairman of the Board of VESA and Chairman of the VESA DisplayPort Working Group.
DisplayPort 2.1 also updated the DisplayPort cable specification to provide greater robustness and improvements to full-size and Mini DisplayPort cable configurations that allow for improved connectivity and longer cable lengths (over two meters for DP40 cables and over one meter for DP80 cables) without diminishing UHBR performance. VESA-certified DP40 cables support up to UHBR10 (10 Gbps) link rate, with four lanes, providing a maximum throughput of 40 Gbps, while VESA-certified DP80 cables support up to UHBR20 (20 Gbit/s) link, with four lanes, providing a maximum throughput of 80 Gbps.
“For all of our standards, including DisplayPort, VESA has invested significant resources in testing and auditing procedures, including interoperability testing of products incorporating VESA specifications. This is to ensure that products introduced to the market that claim support for VESA standards meet the high quality standards we have set. VESA continues to study and develop new procedures to improve our auditing process to ensure robust implementation of quality products supporting DisplayPort and other VESA specifications in the market. With contributions from test equipment vendors, VESA has a robust test infrastructure to support wider testing and deployment of DisplayPort 2.1-certified devices in the marketplace.
— said James Choate, compliance program manager for VESA.
“end of press release”
#VESA #Releases #DisplayPort #Specification #VideoCardz.com