Generalized cross-correlation is consid-ered as the most straightforward time delay estima-tion algorithm.Depending on various weighting func-tion,different methods were derived and a straight-forward method,named phase transform(PHAT)has been widely used.PHAT is well-known for its ro-bustness to reverberation and its sensitivity to noise,which is partly due to the fact that PHAT distributes same weights to the frequencies dominated by sig-nal or noise.To alleviate this problem,two weight-ing functions are proposed in this paper.By taking a posteriori signal-to-noise ratio(SNR)into account to classify reliable and unreliable frequencies,differ-ent weights could be assigned.The first proposed weighting function borrows the idea of binary mask and distributes same weights to frequencies in same set,whereas,the second one assigns weights based on coherence function.Experiments showed the robust-ness of proposed methods to reverberation and noise for improving the performance of time delay estima-tion through various criteria.

Speech and Audio Signal Processing Laboratory,Faculty of Information Technology,Beijing University of Technology,Beijing 100124,China

[1]Xue Yang;Changchun Bao;Zihao Cui-.Weighting Function Modification Used for Phase Transform-Based Time Delay Estimation)[J].中国通信（英文版）,2022(11):241-256

reverberation,borrows

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