Re: Brightness is not all there is
I looked at the uhd roadmap graphic more closely and it has some answers. Phase 2 looked as if it was limited to 10 bits per channel (but 12 bit distribution?) Phase 3 looked as if it could use 10, 12 or 14-bit. Both phase 2 and phase 3 use a BT.2020 colour space, which fills much more of the human colour gamut than the current standard but still misses a chunk that could probably only be reproduced by using more than three colour channels. From a vision research perspective the 10-bit limitation in phase 2 is a pity but the Phase 3 specification looks very impressive indeed.