The most obvious difference between the two standards is bandwidth. The current bandwidth capacity of HDMI 2.0 4K is 18 Gbps, while HDMI 2.1 8K operates at a rate of 48 Gbps. This increase in bandwidth allows HDMI 2.1 to transmit more information, and it also means that the picture transmitted via HDMI 2.1 will have a higher resolution. And higher frame rates.
Most mid-to-high-end TVs provide at least one HDMI 2.0 port. If you have bought a TV in the past few years, the HDMI port is basically 2.0a or 2.0b or even lower. Since the difference between 2.0a and 2.0b is relatively small, we will directly discuss the difference between 2.0 and 2.1 today.
Synthesizing various data, we can see that the most obvious difference between the two standards is bandwidth. The current bandwidth capacity of HDMI 2.0 is 18 Gbps, while HDMI 2.1 runs at 48 Gbps. This increase in bandwidth enables HDMI 2.1 to transmit more information, and it also means that the images transmitted via HDMI 2.1 will have higher resolution and higher frame rates.
Currently, HDMI 2.0 can achieve 4K images at 60 FPS or 8K images at 30 FPS. The new HDMI 2.1 can display 4K images at 120 FPS or 8K images at 60 FPS, and can even support 10K resolution display.
It is worth mentioning that gamers may be the first to feel the advantages of HDMI 2.1, because many game developers are already promoting 4K games at 120 FPS.
HDMI 2.1 has many other advantages. For example, HDMI 2.1 supports "Dynamic HDR" content, which allows adjustment of HDR metadata content on a frame-by-frame basis. HDMI 2.1 also has eARC function, which is an enhanced audio return channel that can transmit high-quality uncompressed audio signals through HDMI cables. In addition, HDMI 2.1 also has variable refresh rate (VRR) and fast frame transfer (QFT) functions, these two functions can reduce delay and may completely eliminate input delay.
You may also need an HDMI 2.1 cable
Like most interface standards, if you want to enjoy the full service provided by HDMI 2.1, you also need a brand new HDMI 2.1 cable, because the HDMI 2.1 48G cable and signal source are different from the current HDMI 1.4/2.0, and manufacturers need Using new manufacturing methods, the HDMI Forum also needs to introduce a new certification program to ensure that the cable can work normally at high speeds and support all features. The good news is that not long ago, some media said that the HDMI Forum is about to complete the certification of the first series of HDMI 2.1 compatible cables, and we will see "official" HDMI 48G cables by then.
What is the difference between HDMI 2.1 and HDMI 2.0? High standards must be good?
There is no doubt that HDMI 2.1 will change the way we watch and enjoy content, whether it is movies, games or streaming TV shows. But for now, in the absence of too much high-quality content, most consumers do not need to pursue the HDMI 2.1 standard too much. HDMI 2.0 cables are sufficient for most situations.