Originally Posted by OzHDHT
I not sure I follow your logic there. Why would we assume the preservation of BT2020 with the Panasonic in HDR-SDR conversion process given the 900 has never done that? The Oppo which I also own, originally only did a version of the same SDR-HDR downconversion until its proper (w/proven flawed colour gamut) tone-mapping feature came out in the beta software a little while back.
The 900's HDR/SDR conversion is a very basic conversion process compared to user adjustable tone mapping with multiple parameters. As far as user adjustability goes, all the 900 presents us with is a single DR conversion adjustment slider to do a very course adjustment of the image. So while it could be said there's a 'tone mapping' process going on, it's very elementary at best.
Regarding the new players, there's no need to speculate on a 'dynamic' tone mapping scenario, it's not the case. We can already see thanks to Robert Zahn at Value Electronics, what the tone mapping menu on the 820 contains
I assumed that because The 900 DOES do that - "that" being HDR>SDR w/ BT2020 intact. You just need a display that can do that (or an HDFury device that can manipulate the EDID, which is what I've used since the 900 came out, to feed HDR>SDR w/ BT2020 to my JVC PJ).
Agree that the Oppo offers more control over how HDR>SDR (when preserving BT2020) is handled, but with the caveat of not only the color gamut issue, but also the potential for severe artifacting depending on scenes and settings. This has been my experience, anyway.
Instead of using the Oppo HDR>SDR capability, I find using a custom gamma curve for this purpose with my JVC provides more predictable and natural-looking results, but IMO the 900 / HDFury HDR>SDR process w/ "normal" gamma is the best solution for HDR material on my JVC, even if it is a "simple" system. It looks very good to me, and I've never seen artifacting outside of slightly blown out whites or slightly dark shadows, once the Slider is set (which usually does OK in the middle setting for me, w/out adj.).
I think it's agreed that the tone mapping portion of what the 900 is doing is fixed, but it is tone mapping nevertheless - it has to. The slider, as you mention, is the only adjustment, and from my experience just sets the basic luminance point of reference for it's static tone mapping.
Was unaware of any specifics on new Panasonic players - thanks for pointing that out and posting screen shot. Appears to be additional control -vs- 900 though, so it will be interesting to see some more commentary on these.