Talk:HDMI

message: Both chapters indicate that they added support for 1920 × 1080 at 120 Hz. Which one is it?  — Preceding unsigned comment added by Anttir717 (talk • contribs) 09:18, 24 July 2022 (UTC)
replies: text: 120Hz is transmittable from HDMI version 1.3 and higher, but it is not a “Supported Format” in this version. Support was added for it in version 1.4 (specifically, the  120Hz timings defined in CTA-861-E were added to the Supported Formats list). "Supported Format" has a special defined meaning in HDMI which does not come across at all in the article (basically it means formats which have timings fully defined in the standard. Being a "Supported Format" is not required in order to transmit however, which is how most people use the word "support"). From a technical standpoint the article is correct as-is, but the wording does need improvement.  — Glenwing (talk) 10:31, 24 July 2022 (UTC)
thread_title:  1.3/1.4 support of 1920 × 1080 at 120 Hz 

message: As HDMI#Display_Stream_Compression and DisplayPort#Display_Stream_Compression are verbatim copies, but the latter contains additional info about newer HDMI (!) revisions, we already witness 
# Avoidable Duplication
# Divergence
in these two articles. 
Since Display_Stream_Compression already exists, we should just remove all but the first sentence from both HDMI's and DP's DSC sections and put the DP's content on that page. Marcusmueller ettus (talk) 11:42, 3 January 2023 (UTC)
replies: text: Agreed. I have felt this should be in its own article for a while, but I've never created a new page before.  — Glenwing (talk) 16:05, 3 January 2023 (UTC)
replies: text: Done the move. Would be great if you could do a quick review of the new article. Marcusmueller ettus (talk) 13:51, 8 January 2023 (UTC)
thread_title:  Move Display Stream Compression section to separate article (partial verbatim copy of same section in DisplayPort article) 

message: First timer, be gentle.
https://en.wikipedia.org/wiki/Hdmi#Specifications
I could not find support for the proposition (Specifically the final sentence about 480i Pixel repetition.):
Which cites to Footnote 3 
I pulled up the relevant Archive.org (2007-06-27 is what would have been active at the above cited date)link: 
https://web.archive.org/web/20070627140331/http://www.hdmi.org:80/learningcenter/faq.aspx
And searched for "pixel" and "480" as well as trying to scan the headlines.
I don't think the source document has changed. I wonder if the wikipedia footnote got erroded over time with the paragraph being edited. I don't know how to do the equivalent of "git blame" over the article history; so I've reached a bit of a wall.
Looking at the big HDMI standards document from Footnote 5 https://web.archive.org/web/20070627140331/http://www.hdmi.org:80/learningcenter/faq.aspx 
I think we do see support for the proposition:
Proposed action: Have the section in question change it's footnote from 3 to 5. — Preceding unsigned comment added by AThomas203 (talk • contribs) 17:48, 13 February 2024 (UTC)
replies: text: . I concur with your assessment, and made relevant changes. TheFeds 22:53, 14 February 2024 (UTC)
thread_title:  Footnote 3 does not support " pixel-repetition scheme" 

message: Maybe add to the tabels their power carrying capacity.  5 volts at 300 mA for 1.5 watts. --Wikideas1 (talk) 07:51, 20 February 2024 (UTC)
thread_title: Power carrying capacity

message: I am the one who implemented cable categories to the table for . I have always been under the impression that each formal title represents a category. But almost six weeks ago, I came by here to look at my  splendid little table addition ;-) and see what resolutions I possibly could use for a bunch of old cables that might come to my possession. I saw that High speed was added into the 2.0 column. I was certain it was an error, but decided to check it anyway. At first I couldn’t grasp that what I read didn’t correspond to my expectations, perhaps denial, but after a while  I couldn’t simply dismiss it. I looked further into categories, and it seemed to me that there are actually only three cable categories, and that Premium high speed is the same thing a regular high speed but with a slightly more comprehensive testing, but not really stricter for the previous test methods. Is that so? Then we should clarify that in the text. Should the columns in the table about frequency limits be merged? --Mango från yttre rymden (talk) 22:59, 30 April 2024 (UTC)
replies: text: I would rather change it back to say "Premium High Speed" only. Formally there are 3 categories (Cat 1, 2, and 3, being Standard Speed, High Speed, and Ultra High Speed). The High Speed certification tests cables at 340 MHz TMDS, which was the maximum speed allowed HDMI 1.4. When HDMI 2.0 was published and increased the limit to 600 MHz, the HDMI Forum announced that any cable that passed the High Speed certification should work for the increased speeds of HDMI 2.0, so no new cable category was needed, and for the first few years of HDMI 2.0 it was claimed that High Speed cables were good for HDMI 2.0 speeds, despite never actually being tested at 600 MHz as part of the certification. Long story short, they were wrong, and later found that there were some cables that could pass the High Speed certification but fail at 600 MHz. This led to the creation of the "Premium" certification, which is technically an additional test that you can do on top of the normal High Speed certification, which actually tests the cables at 600 MHz.  — Glenwing (talk) 17:40, 18 May 2024 (UTC)
thread_title: Cable categories