Talk:High Dynamic Range (display and formats)/Archive 1
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| Archive 1 |
Nothing about HDR-capable TVs and sources of HDR video for them.
I came to this article because I was curious about the utility of buying an HDR-capable TV. However, I find no helpful information. It is not even clear if I need to worry about which standard the TV supports. It is not clear what my options would be for sources of HDR video to exploit the capability of such a set. DrHow (talk) 23:00, 19 November 2016 (UTC)
Update: After posting the above criticism of the article, I came across the following article: http://arstechnica.com/gadgets/2016/12/high-dynamic-range-explained-theres-a-reason-to-finally-get-a-new-tv/ It does a very good job of answering the questions I had originally come to Wikipedia to resolve. I suspect that it would be appropriate to include a link to the Ars Technica article in the Wikipedia article; but I am not sure about the criteria which justify such a link. DrHow (talk) 18:57, 14 December 2016 (UTC)
- Substantial changes have been made to the article. Most important issues should have been solved. - SH4ever (talk) 17:22, 20 May 2021 (UTC)
Opening paragraph needs a lot of work
This is the current opening paragraph:
High-dynamic-range video (HDR video) describes high dynamic range (HDR) video that is greater than standard dynamic range (SDR) video which uses a conventional gamma curve. SDR video, when using a conventional gamma curve and a bit depth of 8-bits per sample, has a dynamic range of about 6 stops (64:1). When HDR content is displayed on a 2,000 cd/m2 display with a bit depth of 10-bits per sample it has a dynamic range of 200,000:1 or 17.6 stops. You will not find this on most displays.
It's pretty terrible. Let's start with the first sentence:
High-dynamic-range video (HDR video) describes high dynamic range (HDR) video...
So, HDR Video describes HDR video?
... that is greater than...
What does it mean to be "greater"? Greater in what measurement?
... standard dynamic range (SDR) video which uses a conventional gamma curve. SDR video, when using a conventional gamma curve...
One sentence implies that using a conventional gamma curve is part of what defines SDR video, then the next seems to indicate that SDR video could be used with a conventional gamma curve. There's also no reason to repeat that SDR video uses a conventional gamma curve so close together.
... and a bit depth of 8-bits per sample, has a dynamic range of about 6 stops (64:1). When HDR content is displayed on a 2,000 cd/m2 display with a bit depth of 10-bits per sample it has a dynamic range of 200,000:1 or 17.6 stops.
Why are so many dense specs/units/measurements just dropped in like this? They doesn't really add to understanding. Why does the HDR spec mention a certain required cd/m2 display, but the SDR spec doesn't? And after reiterating that part of what sets SDR video apart is its use of a "conventional gamma curve", why isn't the type of gamma curve HDR video uses given?
You will not find this on most displays.
Is this still true? When is it true? Does it need to be said in the intro paragraph? It seems like it would be best to just explain what HDR video is in the intro paragraph and keep further information about how it's being used in the rest of the content. Onlynone (talk) 13:54, 7 September 2017 (UTC)
- The whole article is pretty terrible IMO. It is way too technical for Wikipedia's lay audience of non-engineers. — Preceding unsigned comment added by Chris319 (talk • contribs) 00:45, 13 May 2018 (UTC)
- Substantial changes have been made to the article. Most important issues should have been solved. - SH4ever (talk) 17:22, 20 May 2021 (UTC)
No mention of VESA DisplayHDR Specifications?
https://displayhdr.org/performance-criteria/ --195.137.93.171 (talk) 20:26, 8 July 2018 (UTC)
- It has been added by someone. SH4ever (talk) 12:52, 25 April 2021 (UTC)
The opening paragraph says it all.. or basically nothing
greater range of what exactly? Different Colours? Contrast? Brightness? Very poorly written article. I'd like to add to the other comments, that a very basic explanation of what HDR actually does should be added. — Preceding unsigned comment added by Quaelgeist (talk • contribs) 17:21, 3 October 2018 (UTC)
References
- ^ High-dynamic-range video (HDR video) describes video having a dynamic range greater than that of standard-dynamic-range video (SDR video), which uses a conventional gamma curve.[1] SDR video, when using a conventional gamma curve and a bit depth of 8-bits per sample, has a dynamic range of about 6 stops (26=64:1).[1] When HDR content is displayed on a 2,000 cd/m2 display with a bit depth of 10-bits per sample it has a dynamic range of 200,000:1 or 17.6 stops,[1] a range not offered by the majority of current displays.[1]
- Substantial changes have been made to the article. Most important issues should have been solved. - SH4ever (talk) 17:22, 20 May 2021 (UTC)
Draft
Draft:HDR10+ was submitted for review at AFC. This would result in being a main article for the HDR10+ section so if someone could look at the draft it would be appreciated. Otr500 (talk) 13:37, 19 November 2019 (UTC)
SDR contrast ratio
The source of the 1:64 contrast ratio claim seems to suggest that that this is the highest one can get if the video is to be wholly free of banding. Considering that few prioritize perceptually perfect precision over dynamic range, and that it is still difficult for anyone to detect the lack of precision in conventional SDR video, this point seems rather moot. Logically, with the ITU-R standards, digital video has a contrast ratio of 1:990 (1/220/4.5), excluding black. This needs some clarification. 80.162.33.59 (talk) 19:59, 19 September 2018 (UTC)