Extraction method and device for mel frequency cepstrum coefficient (MFCC) characteristics

The invention provides an extraction method and device for mel frequency cepstrum coefficient (MFCC) characteristics. The extraction method comprises the steps of utilizing a high-frequency section Mel filter contained in a Mel filter group to perform filtration treatment on preprocessed audio signals so as to generate Mel region high-frequency components, performing discrete cosine transform on the Mel region high-frequency components so as to generate conversion characteristics of every Mel region high-frequency component, and obtaining the MFCC characteristics of the audio signals according to the conversion characteristics of every Mel region high-frequency component. Due to the fact that the high-frequency section Mel filter contained in the Mel filter group is utilized to perform filtration treatment on the preprocessed audio signals, the Mel region high-frequency components can be obtained, Mel region low-frequency components subjected to environmental influence easily can be removed, the MFCC characteristics extracted from test data and MFCC characteristics extracted from training data do not have large difference, and accordingly robustness of the MFCC characteristics is improved.