fcond=dtwfbbounds(dualwt,L); [A,B]=dtwfbbounds(dualwt,L); [...]=dtwfbbounds(dualwt);
dtwfbbounds(dualwt,L) calculates the ratio \(B/A\) of the frame bounds of the dual-tree filterbank specified by dualwt for a system of length L. The ratio is a measure of the stability of the system.
dtwfbbounds(dualwt) does the same thing, but L is the next compatible length bigger than the longest filter in the identical filterbank.
[A,B]=dtwfbbounds(...) returns the lower and upper frame bounds explicitly.
See dtwfb for explanation of parameter dualwt.