Cepstral prefiltering for time delay estimation in reverberant environments
نویسندگان
چکیده
Time delay estimation (TDE) between the signals received by two or more spatially separated microphones can be used as a means for the passive localization of the dominant talker in applications such as audio-conference. However, in a recent study, it has been shown that reverberation can have disastrous eeects on TDE performance. In this paper , we develop and evaluate a new cepstral preeltering technique which can be applied on the microphone signals before the actual TDE in order to obtain a more accurate estimate of the position of a source in a typical reverberant environment. The performance of a TDE system with and without cepstral preeltering is investigated under controlled conditions via Monte-Carlo simulations. The results clearly demonstrate the beneecial eeects of the new cepstral pre-ltering technique on TDE performance (i.e., reduction of bias, variance and number of anomalous estimates).
منابع مشابه
A new cepstral prefiltering technique for estimating time delay under reverberant conditions
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