HDMI TMDS?

Question

Today, HDMI 2.0 and all previous HDMI versions use TMDS.

Transition-minimized differential signaling (TMDS)

HDMI 2.1 does not use TMDS. It uses the new FRL encoding scheme

FRL (Fixed Rate Link) is a high-speed data transmission encoding scheme used in HDMI 2.1 that replaces the older TMDS (Transition-Minimized Differential Signaling).

https://www.blackbox.com/insights/blogs/detail/tps/2021/02/03/new-hdmi-2.1-technology-part-1-of-2

redxps630 · Answer

HDMI signal summary table   HDMI Version   1.4–1.4b 2.0–2.0b 2.1 Release Date Jun 2009 (1.4) Sep 2013 (2.0) Nov-2017 Mar 2010 (1.4a) Apr 2015 (2.0a)   Oct 2011 (1.4b) Mar 2016 (2.0b)   max Bit Rate (Gbit/s) 10.2 18 48 max Data Rate (Gbit/s) 8.16 14.4 42.6 Data Channels 3 (*) 3 (*) 4 (**) Encoding Scheme TMDS 8b/10b TMDS 8b/10b FRL 16b/18b

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HDMI TMDS?

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HDMI signal summary table
	HDMI Version
	1.4–1.4b	2.0–2.0b	2.1
Release Date	Jun 2009 (1.4)	Sep 2013 (2.0)	Nov-2017
	Mar 2010 (1.4a)	Apr 2015 (2.0a)
	Oct 2011 (1.4b)	Mar 2016 (2.0b)
max Bit Rate (Gbit/s)	10.2	18	48
max Data Rate (Gbit/s)	8.16	14.4	42.6
Data Channels	3 (*)	3 (*)	4 (**)
Encoding Scheme	TMDS 8b/10b	TMDS 8b/10b	FRL 16b/18b