Tue Mar 28 15:31:02 CST 2023
HDMI and DP interfaces are common video interfaces found on computers and monitors, and the VGA, HMDI and DVI that we see every day are actually a protocol. The interfaces that follow these protocols are also known as DP interfaces, HDMI interfaces and so on.
HDMI is currently the most mainstream high definition interface, the full name of the "High-Definition Multimedia Interface", can support video and audio, its main features are to support high resolution, small interface, support uncompressed audio stream transmission, protocol rich.
The current mainstream HDMI 1.4 theoretically supports 1080P 144hz, 2K 75hz, 3840 x 2160/30hz, 4096 x 2160/24hz.
HDMI 2.0 has a bandwidth of up to 18Gbps and supports 1080P 240hz, 2K 144hz, 4K 60hz, and 5K 30hz.
The latest HDMI 2.1 bandwidth capability increases to 48Gbps, which can support 2K 240hz, 4K 120hz, 5K 60hz, 8K 60hz.
Advantages of HDMI:
There is a wide variety of devices that support the HDMI interface.
1. In terms of popularity, it can be said that the HDMI interface has an absolute advantage, the HDMI interface in daily life is clearly more than the DP interface, ruling most of the TVs, projectors and other display devices, set-top boxes for home use are also commonly used to HDMI interface, the current well-known game console platforms are using the HDMI interface as a line transmission path.
2. Dynamic HDR support ensures that every moment of video is displayed scene by scene and even frame by frame with the ideal values of depth, detail, brightness, contrast and wider color gamut.
3. Source-Based Tone Mapping (SBTM) is a new HDR feature that allows a portion of the HDR mapping to be performed by the Source device instead of the Display device.
4. eARC simplifies connectivity, provides greater ease of use, and supports the most advanced audio formats and highest audio quality.
5. Variable Refresh Rate (VRR) reduces or eliminates lag, stuttering and screen tearing for a smoother, more detailed gaming experience.
6. Quick Media Switching (QMS) eliminates the delay that often occurs when a device changes from one HDMI frame rate to another.
7. The HDMI cable is capable of being powered directly from the HDMI connector without the need to connect a separate power cable.
DP (DisplayPort), is a digital video interface standard developed by the PC and Chip Manufacturers Alliance and standardized by the Video Electronics Standards Association (VESA). The interface is certification-free and license-free, and is primarily used to connect video sources to devices such as monitors, and also supports carrying audio, USB and other forms of data.
The DP interface is designed to replace the traditional VGA, DVI and FPD-Link interfaces.
It and the current mainstream HDMI interface are digital HD interface, both support a signal line to transmit video and audio signals at the same time, DP interface from the first generation to 10.8Gbps bandwidth, support 2560 x 1600 12bit output.
The most current market DP1.2 has been up to 21.6Gbit/s beyond HDMI2.0, supporting 1080P 240, 2K 165, 4K 75, 5K 30. DP1.3 supports 2K 240, 4K 120, 8K 30.
The latest DP1.4 supports basically the same bandwidth up to 32.4Gbps, but with the addition of DSC display compression stream technology, thus supporting 4K and 8K. In addition there is support for HDR packets, forward error correction, 32-channel 1536KHz and other technologies.
Advantages of DP(DisplayPort):
1. AMD multi-screen splicing technology must be DisplayPort interface.
2. Higher bandwidth and lower cost. the DP interface can easily support ultra-high resolution displays like 2560×1600.
The same resolution DP response speed is faster, DP supports higher resolution. HDMI due to bandwidth limitations, the maximum unit time can only transmit 30 frames of images, while DP does not have this limitation, therefore, in high resolution (3840 * 2160 or more), DP interface is better, in the 1080P resolution is not much difference.
3. Free, the latest DisplayPort interface unlike the HDMI interface, you need to pay a certain amount of annual membership fees, but also do not have to pay for each product containing the HDMI interface like the HDMI interface, is truly a completely royalty-free.
But the DP cable transmission distance is generally in about 3 meters stable transmission. DP interface is only popular in the PC field and high-end monitors.
DisplayPort vs. HDMI Specs
1. The difference in technical support:
AMD multi-screen splicing technology must be DisplayPort interface. Users need to connect with display devices supporting this interface through DisplayPort data cable to become the main display of the three-screen splicing display, and must be DisplayPort interface directly connected, not through any form of conversion.
2. The difference in bandwidth support:
In terms of performance HDMI 2.1 is already very close to DP1.4, but HDMI 2.1 in terms of bandwidth and data rate . Resolution. Refresh rate is beyond DP 1.4, support more video specifications than DP, but in hdmi 2.1 is not completely popular, then you can use the DP interface.
3. The difference in production costs of manufacturers:
DP interface technology is free, DisplayPort interface is not like HDMI interface, you need to pay a certain amount of membership fees each year, and do not have to pay for each product containing HDMI interface like HDMI interface, is the true sense of the complete royalty-free. Therefore, DisplayPort interface has gained the strong support of many internationally renowned manufacturers.
4. The two are not the same degree of popularity.
HDMI interface in daily life is obviously more than DP interface. If your computer monitor is 1080P, you can use HDMI cable and DP cable. If your monitor is 4K 120Hz and not equipped with HDMI 2.1 interface or the graphics card does not support HDMI 2.1, then you can only use a DP cable. While DisplayPort has specification advantages and some of the features of HDMI could make it a better choice for use in consumer electronics, the two standards end up overlapping in many areas. The VESA standards group responsible for DisplayPort is focused on the growth of PC adoption, while HDMI was defined by the Consumer Electronics Alliance with TVs in mind first. But DisplayPort and HDMI ultimately have similar functionality.
By HornmicLink_Henry @230328 15:39