200e

I have a thirst to know what I'm working with.  
There ARE reasons for the chosen resolutions.  
One reason is to "accurately represent underlying perceptual parameters."
From what I know, to perceive involves understanding and getting a grasp of something.  So, 
what/whose are these perceptual parameters? Are they my own parameters or that of the 
200e?  If they are my parameters, why can't I represent them according to my own perception 
of them via user selected resolutions? (Assign my own bit-rate and sample-rate the way my 
perception of my parameters deems worthy in any given situation.)  If they are the 200e's 
own parameters, then who decided how the 200e should perceive them?  And why does that 
person have the decision and not me? I guess I do have some nagging questions.