Mr. Jeff Park, Technical Director of HDMI LA
For HDMI 2.1 changes over HDMI 2.0, Jeff Park said that the HDMI 2.1 standard will target future video output directions. Compared with HDMI 2.0, HDMI 2.1 has increased a lot in broadband, from 18Gbps of HDMI 2.0, to a maximum of 48Gbps. This supports new video outputs such as 1200Hz 4K video and 60Hz 8K video.
Jeff Park said that in the previous 8K model, an 8K device needed to connect four HDMI 2.0 standard HDMI cables, and under the HDMI 2.1 standard, a single line could perform the task perfectly.
In this CES HDMI booth, HDMI demonstrated with eARC, ultra-high bandwidth, ultra-high-speed dynamic HDR and other HDMI 2.1 features
In practical applications, Jeff Park said that HDMI 2.1 has also added several enhanced refresh rate technologies for video, movies, and games to ensure that users can enjoy smooth and non-gating when using high resolution, such as:
• The “Variable Refresh Rate (VRR)†used in the game can reduce the delay, carding, and tearing of the picture, allowing the player to be more fluid when playing.
• There is also "Fast Media Switching (QMS)" for video and movies that eliminates the white screen delay before the content is displayed.
· "Fast Frame Transfer (QFT)" is aimed at VR virtual reality, which greatly reduces the delay and makes the real-time interactive experience even better.
• In addition there is “Auto Low Delay Mode (ALLM)â€, in which the optimum delay can be set automatically.
In terms of audio, HDMI 2.1's ARC audio return function has been upgraded to a better eARC. Not only does the bandwidth also extend from 1 Mbps to 38 Mbps for HDMI 2.0, it provides ample space for audio formats that require more bandwidth, and it also adds Surround sound formats such as Dolby Atmos and DTS HD Master Audio are supported, as well as support for up to eight 192kHz / 24-bit channels.
HDMI 2.1 has been improved in terms of technical standards, so the data line also has new standards, using the Ultra High Speed ​​HDMI Cable. Jeff Park said that this new data line has ultra-low electromagnetic radiation and is backward compatible. If you do not use the new ultra high-speed data cable, existing data lines can also be used, but it is not compatible with the new features in HDMI 2.1.
Although there is such a big help for audio and video, there is no market for products that can meet the HDMI 2.1 standard.
Jeff Park said that there are many products that have HDMI 2.1 features enabled, but none have passed the certification test for these features, so it may be available later in 2018, but HDMI 2.1 has entered the fast lane.
According to foreign media reports, it is expected that the HDMI Forum will publish the first phase of qualified testing requirements in the second quarter of 2018 and complete all test requirements in the third quarter. Then at CES in 2019, you may be able to see the first products that meet the HDMI 2.1 standard. At this point, the 8K era will really open.
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