Advantages of HDMI 2.1

Many people believe that the device interface does not have much importance, in all honesty, input and output devices in the beginning of the design, as far as possible to carry the appropriate interface configuration, to display devices, for example, the panel supports the resolution and refresh rate are generally equipped with matching interface specifications, 1080P clarity of the display, there is really no need to carry the interface configuration to meet the 4K specifications, consumers in the choice of products The consumer does not need to make too tangled choice.

Advantages of HDMI 2.1

However, we need to be aware that when increasing the resolution of the video signal, the amount of data in the signal increases. A 3,820×2,160 4K UltraHD signal sent over HDMI has about four times the data volume of an HD 1,920×1,080 signal. If you think of the cable as a water pipe, a larger pipe than 1080p is required to transmit a 4K signal.

2020 display new standard HDMI ushered in an important upgrade

Back at CES 2017, HDMI announced the new HDMI 2.1 specification with a wire speed specification of 48Gbps, allowing image data of 8K/60 frames per second or 4K/120 frames per second to pass through. In addition, it can also bring gain to 4K TVs equipped with this interface.

Upgraded specifications of external devices should require thicker cables

The players are concerned that this year’s flagship TVs, have been equipped with refresh rate up to 120Hz panel, maintaining the color performance at the same time, the high refresh rate panel can bring a smoother picture display effect. As we mentioned earlier, to support 4K120Hz picture transmission, HDMI 2.1 interface is a necessary condition, and equipped with HDMI 2.1 interface, but also need to further play the advantages of the interface high bandwidth flux.


High refresh rate panel is a double-edged sword, we analogy high refresh rate gaming monitor, fast frame rate of the screen to slow frame rate of the transition if too abrupt, the effect of screen tearing will occur, so NVIDIA and AMD have launched G-Sync and Free-Sync two technologies to improve the situation.

For TV products, there is a more simple and direct way to improve this situation, which requires the use of HDMI 2.1 another feature – VRR (Variable Refresh Rate), HDMI 2.1 higher bandwidth to transmit more data, but also to be able to “wrap” in the data “more “small movements” after the chip has been processed.


By changing the front and back frame fast and slow, with interpolated frames and other ways to bring a more complete and unified view of the picture, the new next-generation host will also be equipped with HDMI 2.1 interface, so it also supports VSR function, while the new interface also brings ALLM (Automatic Low Latency Mode), further improving the feedback efficiency of the TV and external devices to work together.

HDMI 2.1 specification changes for thick pipes

The first is the support for Dynamic HDR (Dynamic HDR), which optimizes HDR on a per-scene, or even per-individual frame basis, rather than applying one setting to the entire video.


Furthermore, gamers should be interested in Variable Refresh Rate (VRR), which allows the data output to determine the update frequency of the output signal, and if the monitor cooperates, the update frequency can be adjusted to be consistent with the current FPS, significantly reducing the screen tearing occur.

Screen, machine, line trinity, less who can not

Looking back to the 1080p Full HD era, Sony PS2 and xbox still can not squeeze the performance of the mainstream TV set at the time, the next step into the 4K era, PS3 and xbox 360 are dying, 4K quality of the game screen for PS4 and xbox one and really stretched, so to speak, game consoles and TVs have never been like 2020 this catch up with the time. The host supports 4K 120Hz TV is also the same, and block them from each other to support, that is, a wire.


The higher bandwidth of HDMI 2.1 enables more data to be transmitted and, of course, more features to be supported. VRR (Variable Refresh Rate), a feature that can only be carried at high bandwidths, brings a more complete and unified picture experience by changing the speed of the front and back frames. The new interface also brings ALLM (Automatic Low Latency Mode), which further improves the feedback efficiency of the TV working with external devices.

If you are a deep gamer and are looking forward to the launch of the two new consoles, be sure to pay attention to the features and specifications I mentioned above when shopping for a TV.

HDMI 2.1 is the necessary option to buy a TV in the future!


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