Before revision: In FM broadcasting, preemphasis improvement is the improvement in the signal-to-noise ratio of the high-frequency portion of the baseband, i.e., modulating , signal, which improvement results from passing the modulating signal through a preemphasis network before transmission.
After revision: In FM broadcasting preemphasis improvement is the improvement in the signal-to-noise ratio of the high-frequency portion of the baseband, i.e., modulating , signal, which improvement results from passing the modulating signal through a preemphasis network before transmission.