Sony Oled A1

Se me olvidaba comentar esto sobre la A1:

You might notice very little difference between DV and HDR10 on a X1E equipped Sony TVs. Sony HDR TVs don’t use the static brightness metadata in HDR10 (MaxCLL, MaxFALL) they actually measured brightness frame by frame and generates dynamic metadata for HDR10 content.

This is also why the Sony TV’s APL (average picture level) is higher than the competitor’s HDR TVs when viewing HDR content (especially material mastered at 4000 nits). We only apply tone mapping (which reduces screen brightness and accuracy) when the brightness of the frame exceeds the TV set’s capabilities. It is then applied to ensure HDR highlights are properly displayed.

This is also to why Dolby Vision looks better on some TVs than HDR10. If you compare DV to HDR10 on a LG OLED you will see the same APL difference.

BTW if CALMAN is setup incorrectly, PQ curve (1000 and 4000 nits) of a Sony TV we look the same. Many TVs you can just changes the MaxCLL to measure. A Sony TV can tell that the test pattern brightness is still 1000nits and doesn’t react because it ignores the MaxCLL metadata.

Y por eso os comentaba que hacía falta el Active HDR de LG en sus OLED, actuando de forma similar a como lo hace la Sony por defecto, que restauraría el brillo perdido por el mapping y a la vez ser más cercano al ST.2084. Esto debería ir en el hilo de las LG, pero bueno lo pondré aquí que no creo que moleste mucho, ya que estoy comparando ambas TV's:

To restore HDR APL closer to ST.2084 PQ EOTF, it’s necessary to engage Active HDR, a feature LG devised to simulate dynamic metadata presentation from static metadata (or even if no metadata is present at all). Since Active HDR is dynamic in nature, its effect couldn’t be accurately documented using traditional PQ EOTF tracking methods, and selected bright scenes (mostly in 4000-nit 4K Blu-rays) still appeared darker than rival LED LCDs that are capable of higher peak brightness.

Parece que al final es una característica de las 2017 bastante importante. No se si el "Contraste Dinámico" de las 2016 actuará de forma similar. Por eso Al, de AVSForums, comentaba que él veía el HDR10 de Sony igual de bien que el Dolby Vision en la LG, claro, Sony ignora los metadatos estáticos HDR y con el XDR crea metadatos dinámicos, por eso se parece: http://www.avsforum.com/forum/40-ole...l#post53545409