preemphasis การใช้

The Dolby preemphasis boosts the recorded level of the quieter VU ), no signal modification is performed.
This distortion may be equalized out with the use of preemphasis filtering ( increase amplitude of high frequency signal ).
This is achieved by bypassing the highpass, lowpass, preemphasis, and deemphasis filters normally contained in the microphone and speaker circuits.
The primary audio signal is modulated by Frequency modulation with a preemphasis "'time constant "'of ? = 50 ?s.
Examples of mitigation techniques for these impairments are a redesign of the via geometry to ensure an impedance match, use of differential signaling, and preemphasis filtering, respectively.