Speech analyzing stage and method for analyzing a speech signal

摘要

A speech analyzing stage ( 12 ) and a method for analyzing a speech signal is described. The speech analyzing stage ( 12 ) is part of an automatic speech recognition system ( 10 ) and is adapted for analyzing in the spectral domain a speech signal sampled at one of at least two different system sampling rates. The speech analyzing stage ( 12 ) comprises a first spectral analyzer ( 18 a) for analyzing the speech signal up to a first frequency (f_lowest) which is preferably derived from the lowest system sampling rate (2xf_lowest) and a second spectral analyzer ( 18 b) for analyzing the speech signal at least above the first frequency (f_lowest).