Description  Claims  Drawing  Cited references 

CN2015075208W   [0001] 
US62162937   [0001] 
EP15169483   [0001] 
US2003065513A1   [0009] 

Adaptive Filtering in Subbands with Critical Sampling: Analysis, Experiments, and Application to Acoustic Echo Cancellation   [0005] 
Prototype filter design for subband adaptive filtering structures with critical sampling   [0008]