Confusion in terms Lw, Lwhite, HDR Reference White

[simontWork]

HDR Reference White is defined in ITU-R BT.2100

I'm not sure that SMPTE can redefine it in this document. A different nomenclature is probably needed if you want to use a non-standard Reference White level.

[ccameron-chromium]

You're right, it looks it's defined both in ISO 21496-1 and in ITU-R BT.2100.

I think that the ISO 21496-1 definition is easier to cite because it's in the Terms/Definitions section of 21496-1. For ITU-R BT.2100, it's defined Note 10a (it's unfortunate that they don't have a definitions section at the top of the ITU documents)

[digitaltvguy]

Hi Simon, It looks like it would be helpful to move Report BT.2408 Table 1 into a full recommendation (maybe in BT.2100). Since 10a is a footnote with parameters for floating point representations, it seems like there should be a clear section recommending nominal reference levels for television production. We can point to the testing that established 203nits in Report BT.2408 and the ISO reference.

Thoughts?

[ccameron-chromium]

I'd like to merge this into #64 where were' scrutinizing the white terms.