[noggin]

I haven't kept up, last I heard it was single or dual layer. Now we have profiles?

Dolby Vision Profiles and Levels PDF (click)

All Paid for Subscription video streaming services (eg. Netflix) use Low Latency DolbyVision (LLDV) Profile 5

Is the Low Latency a function of the Dolby Vision Profile?  I thought LLDV vs Tunnelled metadata was a separate issue, and to do with the video output stage of a player (i.e. how it handled sending Dolby Vision Metadata) once the video had been decoded rather than the codec profile?

UHD Blu-rays that have DolbyVision encodes on them can be played back on players that use LLDV or players that use 'in-video' tunnelling for their metadata - the route the metadata takes isn't a function of the Dolby Vision profile it is mastered in?  Isn't it just that the tunnelling players need the more complex DV-friendly hardware to insert the tunnelled metadata, whereas those that use LLDV can decode the metadata and pass it via standardised HDMI metadata routes (now that there is a standard). I didn't think that the LLDV vs Tunnelling route had anything to do with Profiles used - or am I missing something?