A new method for enhancement of the noisy speech with low SNR

In this paper, the speech enhancement is performed by using the codebooks. For this purpose, making use of the STFT parameters, two codebooks are designed for speech and noise independently. Utilizing an estimator based on a perceptually weighted distance function, we start searching within the codebooks to find the true indexes for each noisy frame. After finding the true indexes, this method synthesizes the enhanced speech by using the speech codebook entries. Simulation results show that the proposed method can enhance a noisy speech with very low (negative) SNR.