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中文摘要：
时延估计是传声器阵列信号处理中的一项关键技术，其目的是估计出同源信号到达不同传声器时，由于传输距离不同而引起的时间差。首先对常用的多种基于时延估计算法进行了论述，并对具有代表性的3种TDE方法进行了仿真，通过综合比较揭示了各自的优缺点，最后给出了进一步的研究方向。
英文摘要：
TDE（Time Delay Estimation） is one of the key techniques in the array signal processing. Since microphones in array are usually placed at different places, TDE is used to estimate the time difference of signal propagation from source to the spatially separated microphone~ Each TDE algorithm is introduced briefly to show its advantages and disadvantages accordingly. And some experiments are made to show the stablity and robutness of each algorithm. Finally, some future research directions about TDE techniques are pointed out.
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Time-frequency cepstral features and combining discriminative training for phonotactic language reco
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