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·How to understand HDMI?
First of all, before we analyze the HDMI 2.1 standard, we must first understand what HDMI is. HDMI English full name "High Definition Multimedia Interface", translated into Chinese to understand is "high-definition multimedia interface." Friends who often play in high definition definitely know that HDMI is the most common interface in video signal transmission. On December 9, 2002, HDMI officially released version 1.0. 
HDMI 2.1 is the gateway to 8K Although the HDMI 1.4 standard introduced in 2009 already supports 4K resolution, it only supports a lower specification of 30Hz, and the HDMI 2.0 standard is also known as "HDMI UHD". From 10.2 Gbps to 18 Gbps, it can also support 4K/60Hz video frames, and is compatible with Rec.2020 color gamut range, bringing a richer color performance. However, HDMI 2.1 has made more exciting upgrades than version 2.0. 
Interested users can click on "4K TV to buy? The 8K of the real times has come." It is reported that the 2020 Tokyo Olympic Games will be broadcasted in full resolution at 8K, and it will be the time to reflect the true advantages of HDMI 2.1.
·What are the features of HDMI 2.1?
HDMI 2.1 supports the latest Dynamic HDR (Dynamic HDR) technology. Dynamic HDR ensures that every scene of the video, even every frame of the video, is readjusted compared to the current HDR 2.0 static HDR. These continuous instructions are called dynamic metadata. HDMI 2.1 provides a comprehensive mechanism for transmitting dynamic metadata so that each frame can display ideal values ​​for depth of field, detail, brightness, contrast, and a wider color gamut. 
Written at the end:
After reading this article, I believe we all have a more in-depth understanding of the latest HDMI 2.1 standard, but I believe we all have a feeling that it will take some time to experience the advantages of this standard. I believe that the HDMI 2.1 standard will be the first to apply to medical, industrial or professional imaging systems. Of course, some high-end TV products will support this standard next year. After all, this standard is very significant for 4K HDR. If we look at the specifications alone, this time the standard upgrade will mean that there will be breakthrough changes in the presentation of future content.
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TV does not come standard with "it" in 2018 are all defective products
Since 2017, more and more display devices have begun to use 4K resolution as the standard, and high-definition video has gradually become the mainstream consumer viewing mode. This has also given birth to innovations in video transmission technology. The HDMI 2.1 standard, which can support 10K and dynamic HDR, has brought more possibilities for the future of audio and video entertainment.
HDMI 2.1 standard depth analysis
The HDMI interface is a digital video and audio interface that enables high-quality transmission of uncompressed high-definition video and multi-channel audio data without the need for digital/analog or analog/digital conversion before signal transmission. Uncompressed digital data transmission can effectively reduce the signal interference and attenuation caused by the conversion. Of course, the application of the HDMI interface is also very extensive. We can see it on TVs, Blu-ray players, monitors, set-top boxes and other devices. HDMI interface is also common on Blu-ray players
Before HDMI appeared, VGA and DVI were the more mainstream interface configurations. With the continuous development of digital high-definition audio and video standards, the HDMI interface was born. Compared with the older generation interface, VGA can only transmit analog signals, so the display accuracy and signal interference problems are inevitable in the transmission process. Compared with DVI, which is also a digital interface, HDMI can transmit audio signals in addition to supporting higher resolution. HDMI Version Evolution
Since the HDMI release of the 1.0 version in 2002, there have been several minor upgrades in 15 years. However, the HDMI 2.0 standard introduced in 2013 has the most significant upgrade span. Current mainstream TV products still continue to use the HDMI 1.4 standard, while high-end TVs and Blu-ray players and other devices use the HDMI 2.0 standard. Unfortunately, with the release of the HDMI 2.1 standard, these devices have become obsolete in the HDMI standard, and by 2018, they are likely to become defective. The increase in video bandwidth is the most significant improvement in HDMI 2.1
The increase in video bandwidth is the most significant improvement in HDMI 2.1, from 18Gbps to a staggering 48Gbps. The increase in bandwidth also makes it possible for higher resolution pictures. First of all, for 4K resolution, HDMI 2.1 standard can support 4K/120Hz screen, 120Hz refresh rate in 4K resolution can not only bring more smooth 4K video, but also can meet the requirements of the popular 3D/VR and other equipments. , Also ahead of competitors Display Port 1.4 in terms of specifications. HDMI 2.1 standard also supports playback up to 10K resolution
In September this year, Sharp officially released a civilian-grade 8K TV. However, it is extremely embarrassing to require 4 HDMI 2.0 interfaces for signal transmission during live demonstration of 8K video. 8K Compared to 4K resolution video signals, the data throughput is not an order of magnitude at all. The HDMI 2.1 standard is capable of presenting an 8K/60Hz picture with only a single line under the enhanced bandwidth. At the same time, even with a 10K resolution screen, the HDMI 2.1 standard can support it. The HDMI 2.0 standard is obviously a bit "unusable" for the transmission of 8K signals.
Although 8K and 10K resolutions are currently mainly used in medical, industrial, or advanced imaging areas, they may be far away from users, but 4K is destined to be a stepping stone to 8K. Dynamic HDR readjusts every frame
For users who love to play games, the HDMI 2.1 standard also improves the processing of the game screen. It will add support for Change Frequency Update (VRR) and Fast Frame Transfer (QFT), which can reduce or even eliminate screen delays in games. QMS can reduce user's black screen time when converting signal input source. HDMI 2.1 includes automatic low-latency mode (ALLM), which automatically sets the ideal picture delay for the smoothest viewing experience. HDMI 2.1 standard supports backward compatibility (click to enlarge)
In sound effects, the HDMI 2.1 standard has also been fully upgraded. It supports the latest eARC technology, and can pass back object-based sound effects such as Dolby Atmos, compared to the existing ARC (Audio Return Channel).