Generalized-log spectral mean normalization for speech recognition
Hilman Ferdinandus Pardede, Koichi Shinoda · 2011
Most compensation methods for robust speech recognition against noise assume independency between speech, additive and convolutive noise.However, the nonlinear nature distortion caused by noise may introduce correlation between noise and speech.To tackle this issue, we propose generalized-log spectral mean normalization (GLSMN) in which log spectral mean normalization (LSMN) is carried out in the q-logarithmic domain.Experiments on the Aurora-2 database show that GLSMN improved speech recognition accuracies by 20% compared to cepstral mean normalization (CMN) in mel-frequency domain.