This site may give you a bit more info regarding the Redbook spec. I think you would have to pay for the full spec.
http://whatis.techtarget.com/definition/0,289893,sid9_gci503642,00.html

Cheers,
Rob

Living Room Kit: 861v4+ID40, DSP7000, DSP5500, DSP5500HC, HD621
Bedroom Kit: F80
QNAP TVS-471, Roon, iPad Air2