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What is DisPlayPort?

Currently, HDMI is making a fierce attack on the home appliance and PC sectors with its advantages of supporting audio and video output and providing enough bandwidth to play 1080p HD programs. However, HDMI's road to popularity has only begun when a new interface with greater functionality and bandwidth, DisPlayPort, issues a strong challenge to it.

In May 2006, VESA (Video Electronics Standards Organization) officially released the DisPlayPort 1.0 standard, an open standard for all display devices (including internal and external interfaces).

High bandwidth.
When DisPlayPort was first introduced, it could provide bandwidth as high as 10.8Gb/s to support resolutions such as WQXGA+ (2560×1600), QXGA (2048×1536) and color depths of 30/36bit (10/12bit per primary color), with sufficient bandwidth to ensure the future demand for higher resolutions for large display devices.

Integration of peripheral devices.
In addition to the main transmission channel, DisPlayPort provides a powerful auxiliary channel. With a transmission bandwidth of 1Mbps and a maximum latency of only 500μs, this auxiliary channel can be used directly as a transmission channel for low bandwidth data such as voice and video, and additionally for latency-free game control.

Internal and external interfaces.
There are currently two types of external connectors for DisPlayPort: a standard type, similar to USB, HDMI and other connectors; and a low profile type, mainly for applications with limited connection area, such as ultra-thin notebook computers. Both connectors can be connected up to a maximum distance of 15 meters.

In addition to achieving connectivity between devices, DisPlayPort can also be used as an internal interface for devices or even as a data interface between chips and chips.

Simplifying product design.
DisPlayPort's digital signal can be output directly, and it simplifies the internal design of LCDs to drive panels directly for display, streamlining the LVDS conversion circuitry.

Content Protection Technology.
DisPlayPort also wants to extend its reach into the consumer electronics sector, which is very sensitive to copyright protection, and without the appropriate content protection technology, it is difficult to gain the favor of film suppliers even if it is advantageous. In this regard, DisPlayPort is ready, but it does not use HDCP like HDMI and UDI, but uses a set of content copy-protection protocols developed by Philips for DisPlayPort, which is based on a 128-bit high-speed encryption engine with a standard key exchange method, supports standard RSA authentication, and provides up to 2048 bits of key length, the protection technology is more reliable than HDMI's HDCP. Of course, DisPlayPort's architecture is more flexible, and vendors can choose other content protection protocols as needed.

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