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 (18a) for analyzing the speech signal up to a first frequency (flowest) which is preferably derived from the lowest system sampling rate (2xflowest) and a second spectral analyzer (18b) for analyzing the speech signal at least above the first frequency (flowest)