TV DP vs. HDMI, which is better?


The release of the new XBOX and PS5 not only makes people look forward to next-generation console games, but also pushes 4K 120Hz high brush gaming TVs into the hot seat, and also popularizes HDMI 2.1 standard port knowledge for console gamers - HDMI version 2.1 is able to transmit more video per second compared to the current mainstream version 2.0, and audio content, so it can load 4K ultra-HD resolution, up to 120 fps screen refresh rate.

But in fact, 4K 120Hz in the PC field has long been nothing new, the use of DP1.4 standard port graphics cards and monitors, you can easily reach 4K 120Hz. Why TV manufacturers do not use the same support 4K 120Hz DP port, but have insisted on using the HDMI port?

What is DP and HDMI interface?

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DisplayPort (DP for short) 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 displays, and also supports carrying audio, USB and other forms of data.

hdmi interface.jpg

High Definition Multimedia Interface (HDMI) is a fully digital video and audio transmission medium that transmits uncompressed audio and video signals. HDMI can be used in set-top boxes, DVD players, personal computers, video game consoles, integrated amplifiers, digital audio and televisions, and other devices.

In layman's terms, DP and HDMI interfaces are very similar in function and can be used for the transmission of video and audio signals, but of course, the strengths and weaknesses of the two interfaces will depend on their hardware parameters.

DP 1.4: Maximum total bandwidth of 32.40Gbps and maximum total data rate of 25.92Gbps for the main link.

HDMI 2.1: Transmission bandwidth 48.0Gbps, maximum data rate 42.6Gbps.

Other performance comparisons: both support 1080p 30-240Hz, 1440p/2k @ 30-240Hz, 4k 30-144Hz/240Hz DSC, 5k 30-60Hz/120Hz DSC, [email protected]/60Hz DSC, color format, color depth, color space support is basically the same, the only difference is that DP 1.4 also supports DCI-P3 color space, HDMI 2.1 is additional support for 8K 120Hz.

Why do TV manufacturers insist on using the HDMI interface?

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DP interface is a protocol dominated by PC and monitor manufacturers, while HDMI interface is a protocol dominated by TV manufacturers. At this stage in the field of television, the popularity of HDMI has been very high, while a variety of TV-related "derivative products" - the TV box, game consoles, players, speakers and amplifiers, etc. are also based on the HDMI interface.

If you abandon the HDMI interface using the DP interface, you will face the problem of backward compatibility - a bunch of old equipment at home can not be connected to the TV.