exc[i]+=2*((((float)rand())/RAND_MAX)-.5);
exc[i]+=3*((((float)rand())/RAND_MAX)-.5);
void noise_codebook_unquant(float *exc,void *par,                      /* non-overlapping codebook */int   nsf,                      /* number of samples in subframe */SpeexBits *bits,float *stack){   int i;   for (i=0;i<nsf;i++)      exc[i]+=2*((((float)rand())/RAND_MAX)-.5);}