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Pre-emphasis: 20ms -40 ms duration. Usually the frame

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Pre-emphasis: In this step signals are passing through a filter. Pre-emphasis procedure emphasizes the higher frequencies. This process will increase the energy of signal at higher frequency. 21Yn =Xn -0.95 X n-1 (1)The goal of pre-emphasis is to compensate the high-frequency part that was suppressed during the sound production mechanism of humans.

Moreover, it can also amplify the importance of high-frequency formants. 22Framing: After pre-emphasis process we split the signal into short –time frame of 20ms -40 ms duration. Usually the frame size (in terms of sample points) is equal to power of two in order to facilitate the use of FFT.

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Overlapping is used to produce continuity within frames. The voice signal is divided into frames of N samples. Adjacent frames are being separated by M (M

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