Source of YFbFr

- New invertible integer color transforms based on lifting steps and coding of 4:4:4 video,
--  http://ftp3.itu.int/av-arch/jvt-site/2003_09_SanDiego/JVT-I015r4.doc


- Color space adaptation for video coding
--  https://upcommons.upc.edu/bitstream/handle/2099.1/16147/ColorAdaptVideoCoding.pdf
 3.1.3.4 Y’FbFr 
 Y’FbFr [15] is another color space built upon on the same ideas as Y’CoCg:
 making use of the KLT to design an integer reversible color transform with
 a high coding gain and low bit expansion.
 Not only does it share its design ideas with Y’CoCg, but also the way it has been
 implemented through a lifting scheme [13] in which each pixel is computable with
 five additions and three bit shifts.

- A new color transform for RGB coding
--  https://www.researchgate.net/publication/4137783_A_new_color_transform_for_RGB_coding