In the simplest form of LPC coding, voiced excitation consists of a train of

impulses which differs a great deal real world cases, where each excitation

pulse possesses a certain shape, different an ideal impulse. The shape of the

pulse contains important information and is captured by the MELP coder through

Fourier magnitudes (next section) of the prediction error. These quantities are used

to generate the impulse response of the pulse generation filter (Figure 17.1), responsible

for the synthesis of periodic excitation.-In the simplest form of LPC coding, voiced excitation consists of a train of

impulses　which differs a great deal　real world cases, where each excitation

pulse possesses a certain shape, different　an ideal impulse. The shape of the

pulse contains important information and is captured by the MELP coder through

Fourier magnitudes (next section) of the prediction error. These quantities are used

to generate the impulse response of the pulse generation filter (Figure 17.1), responsible

for the synthesis of periodic excitation.