Delay equalization

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.¹ Clever machine-learning techniques are now being applied to the design of such filters.²

References

Quélhas, MF; Petraglia A (2003). "Group delay equalization of discrete-time filters". 2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692). Vol. 2. pp. 924–927. doi:10.1109/ISIE.2003.1267945. ISBN 0-7803-7912-8. S2CID 59595813.
Žiška, P; Laipert M (2006). "Band-pass Filter Group delay equalization". Proceedings of the 38th Symposium on Systems Theory: 289–293.

[1] Quélhas, MF; Petraglia A (2003). "Group delay equalization of discrete-time filters". 2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692). Vol. 2. pp. 924–927. doi:10.1109/ISIE.2003.1267945. ISBN 0-7803-7912-8. S2CID 59595813.

[2] Žiška, P; Laipert M (2006). "Band-pass Filter Group delay equalization". Proceedings of the 38th Symposium on Systems Theory: 289–293.

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