A novel speech enhancement method based on wavelet packet energy in strong noise background
AIM:To explore a novel speech enhancement method based on wavelet packet energy for speech signal acquisition in strong noise background. METHODS: Speech signals were decomposed and reconstructed by application of wavelet packet analysis technology. Both the time and scale thresholds of wavelet packet coefficient were adaptively adjusted so that the wavelet packet coefficient could be reconstructed to accomplish noise adaptive canceling. RESULTS: In condition of strong noise at O dB signal to noise ratio,the spectrum of the enhanced speech was obviously clear and its components were more plentiful than the original speech in a wide range of frequency band of 0 - 3000 Hz. CONCLUSION: Our proposed speech enhancement method is quite effective in removing the noise component of the speech signal in strong noise background.
NETL
NSTL
万方数据
维普
