what the feature extraction from voice recognation

[ayham]

i'm master student, and i wrok on my thesis,my thesis on voice recogntion and speech recogntion,and i have the qustion about if there is the difference from the feature extraction that teken between the voice and speech,or what the feature extraction that i take it from the voice and what feature extraction that i take it from the speech.....or how can i split the sound for the voice and for the speech when i want to take the feature from this sound....