I want to know the answer to the following question:
Due to a specific kind of structure, what kind of problems are made worse?
All the background I'm provided with is that "Additionally, the combining of the two filter banks' outputs creates aliasing problems that must be handled partially by the "aliasing compensation" stage; however, that creates excess energy to be coded in the frequency domain, thereby decreasing coding efficiency.[citation needed]". Is that enough to answer the question?