What is the dp interface?

The dp interface is a display interface, a digital video interface standard developed by the PC and Chip Manufacturers Alliance and standardized by the Video Electronics Standards Association (VESA). The dp interface can connect a computer and a monitor, or a computer and a home theater. It is the first display communication port to rely on packetized data transmission technology.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The dp interface is a display interface.

dp stands for "DisplayPort". It is a digital video interface standard developed by the PC and Chip Manufacturers Alliance and standardized by the Video Electronics Standards Association (VESA). It can be connected to a computer and a monitor, or Computers and Home Theater. This interface is free of certification and license fees. It is mainly used to connect video sources to monitors and other devices, and also supports carrying audio, USB and other forms of data.

This interface is designed to replace the traditional VGA, DVI and FPD-Link (LVDS) interfaces. The interface is backwards compatible with legacy interfaces such as HDMI and DVI via active or passive adapters.

The dp interface is the first display communication port to rely on packetized data transmission technology, which can be used on Ethernet, USB, PCI Express, etc. Found in technology. It can be used for both internal and external display connections. Different from past standards that required fixed transmission of timer signals in the differential pair of each output end, the DisplayPort protocol is based on small data packets called micro-messages. This micro-message can embed the timer signal in in the data stream. The advantage is that with a smaller pin count, higher resolution can be achieved. Data messaging applications also allow DisplayPort to be extensible, meaning that additional functionality can be added over time without significant changes to the physical communications port itself.

The dp interface can be used to transmit audio and video simultaneously, each of which can be transmitted independently without the other. The video signal path can have 6 to 16 bits per color channel, and the audio path can have up to 8 channels of 24-bit 192 kHz uncompressed PCM audio, or a compressed audio format can be encapsulated in the audio stream. A bidirectional, half-duplex auxiliary channel carries device management and device control data for the primary link, such as VESAEDID, MCCS and DPMS standards. Additionally, the communication port is capable of carrying bidirectional USB signals.

DisplayPort signals are not compatible with DVI or HDMI. However, dual-mode DisplayPorts are designed to transmit single-link DVI or HDMI1.2/1.4 protocols through the communication port, which is accomplished by using an external passive connector to select the desired signal and convert the electrical signal from LVDS Convert to TMDS. Dual-mode DisplayPorts with passive connectors do not support VGA and dual-link DVI. These communication ports require active connectors to convert the protocols and signals required for output. VGA connectors can be powered using the DisplayPort connector, while dual-link DVI connectors may rely on external power (see HDMI, DVI, and VGA Compatibility).

DisplayPort connectors can have 1, 2, or 4 differential data pairs (lanes) on the main link, and each lane can run at 162, 270, or 540MHz on a self-timer basis. The rate is 1.62, 2.7 or 5.4 Gbit/s. The data is 8b/10b encoded, that is, each 8-bit message is encoded into a 10-bit symbol. Therefore, the effective data transfer rates per channel after decoding are 1.296, 2.16, and 4.32 Gbit/s (or 80% of the total).

# As the successor of DVI, the DP interface can also be simply understood as an enhanced version of HDMI. It transmits video signals while adding support for high-definition audio signal transmission, while supporting higher resolutions and refresh rates. For data transmission, DP uses a "micro-packetised" format and is highly scalable, allowing more new content to be added in the future.

DP version development

• ##1.1 Bandwidth 10.8Gbps, up to 2560*1600 (2K) resolution Rate (basically eliminated)

• 1.2 Bandwidth 21.6Gbps, up to 4K (4096*2160) 60Hz (most commonly used)

• 1.3 Bandwidth 32.4Gbps, supporting up to 4K (3840X2160) 120hz, 5K (5120X2880) 60hz, 8K (7680X4320) 30hz output.

• 1.4 Bandwidth 32.4Gbps, supports up to 8K level (7680x4320) 60Hz output, and 4K can go up to 120Hz. (Latest version)

• 2.0 has a bandwidth of up to 80Gbps, which is 2.5 times that of the current DP1.4 and 1.6 times that of HDMI 2.1. It can output 16K 60Hz (DSC) and 10K 60Hz lossless on a single screen. , 4K 240Hz and other images, supporting dual-screen 4K 144Hz lossless.

How to choose DP line

When we buy DP cables, we will find that there are many types of DP cables. According to size, they are divided into DP interfaces and mini DP interfaces developed by Apple. They are divided into male-to-male and male-to-female.

The most common one is DP male-to-male HD cable, which is generally used as a direct connection cable for device interconnection. It is also called a video cable. For example, the computer output terminal is connected to the TV input terminal; male-to-female cable is generally used for data extension. Line or special equipment connection line, so it is also called conversion line.

In fact, it is not difficult to choose the correct DP cable. Just confirm the DP cable standard according to your own equipment configuration and your own requirements for game and video output effects. If you want to experience 8K ultra-clear vision and smooth game operation, we recommend version 1.4 DP HD cable.

Notes on using DP adapter/conversion cable:

When only one end of the input device and output device you want to connect is a DP interface, then use the adapter Please pay attention when connecting the adapter/conversion cable:

DP to HDMI can achieve two-way transfer, and the transmission picture will not be distorted;

DP to DVI is a one-way transfer, DP to DVI products can only convert DP to DVI. The DP terminal is connected to the computer host graphics card, and the DVI is connected to the monitor. If used vice versa, there will be no display;

DP to VGA, these two interfaces cannot be directly connected, and an adapter is required Add a chip, but generally the adapters sold have chips added, so you generally don’t have to worry about this problem.

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