From a purely theoretical viewpoint 10+ bits encoding will lead into slightly better results even if rendered using a traditional 8 bit decoder. One source of error has been removed from the pipeline.
I might be wrong, but it seems like Apple is the primary game in town for supporting HDR. How do you intend to persuade Apple to upgrade their JPG decoder to support Jpegli?
p.s. keep up the great work!
I didn't follow up and I don't know if she read it or understood the proposal.
The data is carefully encoded in the dct-coefficients. They are 12 bits so in some situations you can get even 12 bit precision. Quantization errors however sum up and worst case is about 7 bits. Luckily it occurs only in the most noisy environments and in smooth slopes we can get 10.5 bits or so.