energy

Digital Signal Processing Library

Voice Lab

energy

double energy(double *vector, int vector_width, int option)
{
        int i;
        double d_energy;

        /* start with zero energy */
        d_energy = 0.0;

        for(i = 0; i < vector_width; i++){
                /* add the square of each element of the vector */
                d_energy += (vector[i] * vector[i]);
        }

        if(option & 0x02) return(sqrt(d_energy));
        if(option & 0x08) return(d_energy/vector_width);
        return(d_energy);
}