Sunday 29 January 2012

What is a DisplayPort

DisplayPort is display interface standard made by the Video Electronics Standards Association (VESA). The specification defines a royalty-free digital interconnect for digital audio and video. DisplayPort can provides the similar functionalities like HDMI but is not expected to displace HDMI in high-definition consumer electronics devices.

DisplayPort uses a self-clocking micro-packet-based protocol that allows flexible allocation of bandwidth between audio and video. It is the first display interface to rely on packetized data transmission similar to other data communication protocols such as Ethernet, USB, PCI etc. Due to the use of data packets, DisplayPort are extensible, that means additional features can be added over time without significant changes to the interface itself.

version data rate capability
DisplayPort 1.0max 8.64 Gbit/s sufficient for 1920×1200(30 bpp) @ 60 Hz
DisplayPort 1.2 max 17.28 Gbit/s 2560×1600(30 bpp) @ 60 Hz and 3840×2160 in CVT-R(Reduced blanking mode)

The DisplayPort signals are not directly compatible with HDMI/DVI but analog they can be supported using powered adapters which perform active conversion. Some related technologies derived form DisplayPort are :-
  • Embedded DisplayPort (eDP) defines standardized display panel interface for internal connections ( like graphics unit to laptop display panels ).
  • Wireless DisplayPort will have bandwidth and features similar to DisplayPort 1.2 for cable-free applications operating using 60 GHz radio band.

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