> It should be added that both avc and hevc support 12bit 
> encoding...
It's a bit more complicated than just a twelve-bit video signal. Vision uses 
the 10-bit image as a base and then trims it using the additional data stream, 
taking into account the capabilities of the display.
Correct display would require knowledge of the capabilities of the display 
hardware itself, not to mention significant reverse-engineering of Dolby's 
engineering approach. Most Vision decoders will be built into displays and 
therefore have that knowledge.
Decoding of Vision to the point where it could be transcoded into other HDR 
formats is possibly more feasible based on the standards for those formats.
P  
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