An improved arithmetic of MFCC in speech recognition system

Everyone have their own speaking pitch frequency, while the research of the traditional MFCC ignoring the impact of pitch frequency, reducing the accuracy of the voice signal description, and thus affect the performance of speech recognition. MFCC which based on the speaking frequency envelope extracted (referred to as SMFCC), performs better than MFCC which based on the amplitude spectrum extracted; And consider the importance of cepstrum in speech recognition, weighted window MFCC (or SMFCC) can improve speech recognition rate effectively.