Delay equalization

{{Short description|Signal processing technique}}

In signal processing, delay equalization corresponds to adjusting the relative phases of different frequencies to achieve a constant group delay, using by adding an all-pass filter in series with an uncompensated filter.{{cite book | last = Quélhas | first = MF |author2=Petraglia A | title = 2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692) | chapter = Group delay equalization of discrete-time filters | year = 2003 | volume = 2 | pages = 924–927| doi = 10.1109/ISIE.2003.1267945 | isbn = 0-7803-7912-8 | s2cid = 59595813 }} Clever machine-learning techniques are now being applied to the design of such filters.{{cite journal | last = Žiška | first = P |author2=Laipert M | year = 2006 | title = Band-pass Filter Group delay equalization | journal = Proceedings of the 38th Symposium on Systems Theory | pages = 289–293}}