We have just presented our IEEE Signal Processing Letter on “An Adaptive All-Pass Filter for Time-Varying Delay Estimation” at ICASSP 2022. This work presents an adaptive filter for time-varying delay estimation based on an all-pass filtering framework. The coefficients of the adaptive filter evolve over time to provide an online estimate of the time-varying delay between two signals.

A video recording of the conference presentation can be found here and the paper is available here: An Adaptive All-Pass Filter for Time-Varying Delay Estimation. Finally code to implement the filter is available on GitHub at Adaptive AllPass.

All-pass filter framework for time delay estimation.