Defined specifications of the HDMI standard 2.1


2017-11-30 17:00:06




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Defined specifications of the HDMI standard 2.1

The HDMI Forum Organization, responsible for developing specifications of the HDMI standard, presented the final features of the new HDMI standard 2.1. Despite the version number, which would likely only minor updates, the new specification is significantly superior to HDMI 2.0 and provides almost twice higher throughput.

To use HDMI 2.1 will need a new cable Ultra High Speed HDMI bandwidth 48 GB/s. the New cable is fully compatible with the old sockets, as it uses the same port architecture, however, supports higher bandwidth compared to HDMI 2.0 (18 Gbps) and even more so HDMI 1.4 (10.2 Gbps).

What are the opportunities with such a capacity? First, support for higher resolutions, higher frame rate and color depth. Thanks to the new HDMI cable can support 4K resolution video at up to 120 frames per second with high dynamic range to 12 bits per channel. If you reduce the number of frames to 30, then the new standard will offer support for 12-bit video format 8K, and the color subsampling indicator of the frames per second will increase to 60 at the same resolution and color depth.

It is Worth noting that HDMI 2.1 bandwidth of 48 GB/s is not the limit. With the new Display Stream Compression (DSC) video stream can be compressed on the fly, allowing them to achieve transmission speeds of up to 128 Gbps for 12 bit video format 8K/120 Hz and a color sub-sampling. If permission to 8K you are not enough, the new standard includes support for 10K (10 240 × 4320 pixels).

But it's all numbers, and now with regards to new features. For example, gamers will definitely be interested in the technology of Variable Refresh Rate (VRR), which is essentially standardized and standardized version of G-Sync from NVIDIA and Freesync from AMD and allows you to reduce / eliminate lag and stuttering of the picture for smoother gameplay. New technology Quick Transport Frame (QFT) also allows to reduce the latency and lag and also provides a smoother gaming experience and virtual reality.

For moviegoers in the new standard supports Dynamic HDR, ensuring perfect depth, detail, brightness and contrast in each video frame. Improved technology Audio Return Channel (eARC) was supported, uncompressed 7.1 channel sound and now works better with the surround sound technologies like Dolby Atmos and DTS:X.

Despite the fact that the new standard has received the final specifications, we are unlikely in the near future will see in the market of equipment, have a physical HDMI 2.1. Over the next nine months, the HDMI Forum expects to conduct and publish the results of tests for compliance to all stated specifications, and only then can we expect the first products supporting the new standard. Of course, some new technical features like support for video formats 8K and 10K is unlikely to appeal to a mass audience (technology enabled the first format is a lot of money, but about the second case at all to say nothing). The same 4K format is still not reached the level of mainstream. However, new technologies VRR and QFT will definitely find its fans, however, considering that the market will be the video card and monitors with their support.


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