This PHD thesis is the best technical coverage of dither science that I've seen: https://uwspace.uwaterloo.ca/bitstream/handle/10012/3867/thesis.pdf;jsessionid

This PHD thesis is the best technical coverage of dither science that I've seen: https://uwspace.uwaterloo.ca/bitstream/handle/10012/3867/thesis.pdf;jsessionid=A3B029F6D36E97D7736287A136AB9962?sequence=1 https://uwspace.uwaterloo.ca/bitstream/handle/10012/3867/the... Among the things it covers is the design of a noise shaping filter with a more symmetrical response than the Floyd-Steinberg one.