The dp line is connected to the dp interface, and the hdmi line is connected to the hdmi interface. The following is the difference between dp and HDMI.
The leading manufacturers are different. HDMI is dominated by TV manufacturers, while DP is dominated by VESA Association. There is no difference between the two. In addition, the popularity of the two is different, and the HDMI interface is obviously more than the DP interface in daily life.
Specifically, the differences between HDMI and DP are as follows:
1. Bandwidth
The version of DP 1.0 is as high as 10.8Gbps, while the original HDMI is only 4.95Gbps. Theoretically, the higher the video bandwidth, the greater the amount of data transmitted. At present, the video bandwidth of DP2.0 reaches 77.37Gbps, which can realize video output of 16K 60Hz or two channels of 8K 120Hz, and supports HDR-65438. Relatively speaking, the current HMDI 2. 1 only supports 8K 60Hz at most.
Step 2 synthesize
Like HDMI, DP allows video and audio signals to be transmitted through one cable, but it is slightly more advanced than HDMI. In addition to the four main transmission channels, DisplayPort also provides a powerful auxiliary channel. The transmission bandwidth of this channel is 1Mbps, and the maximum delay is only 500μs s. It can be directly used as a transmission channel for low-bandwidth data such as voice and video, and can also be used for game control without delay.
Step 3 live in harmony
HDMI needs to be converted into TMDS signal through TMDS circuit. DP digital signal can be directly output. Moreover, DP simplifies the internal design of LCD, realizes the integration with the panel, and can input all signals into the video processor of the motherboard with only one connecting wire, which reduces the design difficulty of the motherboard and greatly reduces the cost.
4. Length
Due to the change of service environment, cable length is also a very important consideration. The longer the cable, the more serious the loss and delay of image and audio information. The maximum length of DP line is about 3m, but it is suggested that the length of DP line should not exceed 1.8m, otherwise the display quality will be greatly reduced. The length advantage of HDMI is great, and the maximum support is 15m.
5. Safety
With more and more attention paid to digital copyright, security becomes more and more important. Instead of using HDCP digital copyright protection protocol like HDMI port, DP has developed a set of content copy prevention protocol AES technology, which provides a key length of 2048 bits, and the protection technology is more reliable than HDMI.
6. Popularization
No matter how many benefits there are, it depends on market feedback. At present, it is obvious that HDMI is more popular than DP. Of course, many graphics card devices already have many DP interfaces.
So in general, each has its own advantages. At present, HDMI is popular, but with the popularity of Type-C interface, the future development of both is worth looking forward to.