?? deemp.c
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/******************************************************************** DEEMP Version 48********************************************************************* De-Emphasize output speech with 1 / ( 1 - .75z**-1 )* cascaded with 200 Hz high pass filter* ( 1 - 1.9998z**-1 + z**-2 ) / ( 1 - 1.75z**-1 + .78z**-2 )** Input:* N - Number of samples* In/Output:* X - Speech*/deemp0( x, n )int n;float x[];{static float dei1=0.0, dei2=0.0, deo1=0.0, deo2=0.0, deo3=0.0;static float deo4=0.0;float dei0;int k;for(k=1;k<=n;k++) { dei0 = x[k]; x[k] = x[k] - 1.9998*dei1 + dei2 + 2.75*deo1 - 2.93*deo2 + 1.48*deo3 - 0.312*deo4; dei2 = dei1; dei1 = dei0; deo4 = deo3; deo3 = deo2; deo2 = deo1; deo1 = x[k];}}?? 快捷鍵說明
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