Filtering and Denoising Analysis for Decoded Speech Signal of CELP Codec

Efforts to eliminate the noise of CELP coding method have been made in order to get better aural effect. The emphasis of eliminating the noise is usually attached on CELP coders. However, this paper pays more attention to encoded speech by using power spectrum estimation and filtering analysis. In the experiments, the aural effect of encoded speech has been improved by the proposed method.