Deep Xi is proposed in [1] and [2], and Deep Xi-TCN model is proposed in [2] to improve the MMSE-based Noise PSD Estimation.
DeepMMSE: A Deep Learning Approach to MMSE-based Noise Power Spectral Density Estimation
The details of Deep Xi-TCN model is avaliable here.
[1] A. Nicolson, K. K. Paliwal, Deep learning for minimum mean-square error approaches to speech enhancement, Speech Communication 111 (2019) 44 - 55, https://doi.org/10.1016/j.specom.2019.06.002.
[2] Q. Zhang, A. M. Nicolson, M. Wang, K. Paliwal and C. Wang, "DeepMMSE: A Deep Learning Approach to MMSE-based Noise Power Spectral Density Estimation," in IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 28, pp. 1404-1415, 2020, doi: 10.1109/TASLP.2020.2987441.