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Time-Delay Estimation Using Source and Spectral Information from Speech

This paper proposes a method for estimating the time-delay between speech signals collected over two spatially distributed microphones using source and spectral information. For a given frame, the cross-correlation sequences obtained separately using the excitation source and spectral information are combined and the time-delay is estimated. The time-delay estimated from the combined cross-correlation sequence is found to be providing better performance compared to the time- delay estimated using individual cross-correlation sequences from source and spectral information. The improved performance by the proposed combined method demonstrates the complementary nature of the information exploited by the source and spectral based methods for time-delay estimation.