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takyon writes:

The High-Definition Multimedia Interface 2.1 specification has been released. The total transmission bandwidth has been increased to 48 Gb/s from the 18 Gb/s of HDMI 2.0 (or a maximum data rate of 42.6̅ Gb/s from 14.4 Gb/s). The new data rate is effectively tripled to 128 Gb/s when using Display Stream Compression (DSC).

Using DSC, HDMI 2.1 cables can transmit 4K (3840×2160) @ 240 Hz, and 8K (7680×4320) as well as UW10K (10240×4320) at 120 Hz. Without DSC, you will be able to transmit 4K @ 120 Hz, 5K (5120×2880) @ 120 Hz, 8K @ 60 Hz, and UW10K @ 30 Hz. Keep in mind that color depth and chroma subsampling also affect the necessary data rate.

The specification also adds new features such as dynamic high-dynamic-range support (you read that right - the first "dynamic" refers to "dynamic metadata that allows for changes on a scene-by-scene or frame-by-frame basis"), Variable Refresh Rate, Quick Frame Transport, Quick Media Switching, and Auto Low-Latency Mode:

This new version of the HDMI specification also introduces an enhanced refresh rate that gamers will appreciate. VRR, or Variable Refresh Rate, reduces, or in some cases eliminates, lag for smoother gameplay, while Quick Frame Transport (QFT) reduces latency. Quick Media Switching, or QMS, reduces the amount of blank-screen wait time while switching media. HDMI 2.1 also includes Auto Low Latency Mode (ALLM), which automatically sets the ideal latency for the smoothest viewing experience.

• Here is the HDMI Forum's PPT PDF explaining HDMI 2.1.
• Here are the data rates and cables required for various resolutions/bit depths/chroma. Resolutions requiring Display Stream Compression are indicated.
• Here is another table showing the various color depths and chroma subsampling levels.

Also at the HDMI Forum, AnandTech, Tom's Hardware, and The Verge.

Previously: HDMI 2.1 Announced

Original Submission

1. "takyon" - https://soylentnews.org/~takyon/
2. "High-Definition Multimedia Interface" - https://en.wikipedia.org/wiki/HDMI
3. "UW10K" - https://en.wikipedia.org/wiki/10K_resolution
4. "chroma subsampling" - http://www.rtings.com/tv/learn/chroma-subsampling
5. "adds new features" - https://www.engadget.com/2017/11/28/hdmi-2-1-specification-is-now-available-with-10k/
6. ""dynamic"" - https://en.wikipedia.org/wiki/High-dynamic-range_video#Production
7. "Here is the HDMI Forum's PPT PDF explaining HDMI 2.1" - http://hdmiforum.org/wp-content/uploads/2017/11/HDMI-Forum-2.1-November-Release-Presentation-EN.pdf
8. "Here are the data rates and cables required for various resolutions/bit depths/chroma" - https://www.hdmi.org/download/hdmi_2_1/FormatDataRatetable.jpg
9. "Here is another table showing the various color depths and chroma subsampling levels" - https://www.hdmi.org/download/hdmi_2_1/Chromatable.jpg
10. "HDMI Forum" - http://hdmiforum.org/hdmi-forum-releases-version-2-1-hdmi-specification/
11. "AnandTech" - https://www.anandtech.com/show/12095/hdmi-21-specification-released
12. "Tom's Hardware" - http://www.tomshardware.com/news/hdmi-2.1-spec-refresh-rates,36008.html
13. "The Verge" - https://www.theverge.com/circuitbreaker/2017/11/28/16710568/hdmi-new-specification-10k-resolution-future-proof-standard
14. "HDMI 2.1 Announced" - https://soylentnews.org/article.pl?sid=17/01/06/1841207
15. "Original Submission" - https://soylentnews.org/submit.pl?op=viewsub&subid=23580

printed from SoylentNews, HDMI 2.1 Released on 2024-04-23 11:07:40