Title :
Blind bandwidth extension for codebook-based Bayesian speech enhancement
Author :
Yaxing Li ; Jonghyeon Kim ; Sangwon Kang
Author_Institution :
Dept. of Electron. & Commun. Eng., Hanyang Univ., Ansan, South Korea
Abstract :
This paper proposes a blind bandwidth extension (BBE) technique that improves the quality of narrowband (NB) speech signal enhanced by the codebook-based Bayesian speech enhancement method with minimum mean square error (MMSE) estimate. The MMSE weight vector of the NB speech envelope codebook is used to estimate the wideband (WB) speech envelope. An adaptive double shifting method is introduced in the BBE to obtain an enhanced WB excitation signal. Its performance is assessed via the log-spectral distortion (SD) and informal listening tests.
Keywords :
Bayes methods; least mean squares methods; speech coding; speech enhancement; vectors; BBE technique; MMSE weight vector; NB speech envelope codebook; NB speech signal; SD; WB speech envelope; adaptive double shifting method; blind bandwidth extension technique; codebook-based Bayesian speech enhancement method; enhanced WB excitation signal; informal listening tests; log-spectral distortion; minimum mean square error estimate; narrowband speech signal quality enhancement; wideband speech envelope; Maximum likelihood estimation; Niobium; Noise; Speech; Speech coding; Speech enhancement; MMSE estimate; blind bandwidth extension; codebook search; speech enhancement;
Conference_Titel :
Consumer Electronics (ISCE 2014), The 18th IEEE International Symposium on
Conference_Location :
JeJu Island
DOI :
10.1109/ISCE.2014.6884512
