The previous research has proved that restoring the instantaneous amplitude and phase individually by linear prediction with Kalman filter on Gammatone filterbank could improve quality and intelligibility of noisy reverberant speech significantly. However, this method still suffers from the double prediction errors caused by the separated estimation for instantaneous amplitude and phase. This paper aims to study feasibility for restoring both instantaneous amplitude and phase simultaneously by

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... omplex Kalman filter to improve previous method. The signal to error ratio (SER), perceptual evaluation of speech quality (PESQ) and SNR loss were used as objective evaluation metrics. Results showed that the proposed method could effectively improve these objective metrics more than the previous method.