17. The audio data processing method of claim 16 , wherein said determining characteristics of the first user comprises performing at least one of spectral analysis, stress analysis and layered voice analysis on a portion of the speech data.
17. The audio data processing method of claim 16 , wherein said determining characteristics of the first user comprises performing at least one of spectral analysis, stress analysis and layered voice analysis on a portion of the speech data. 18. The audio data processing method of claim 17 , wherein said determining characteristics of the first user further comprises determining at least one of gender, age and emotional temperament of the first user based on said performing at least one of spectral analysis, stress analysis and layered voice analysis on the portion of the speech data.