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Definition of "de-emphasis" |
refers to the receiving process of correcting the amplitude of certain signal components that have been “preemphasized” prior to transmission in order to improve signal-to-noise (S/N) ratio. In commercial FM broadcast receivers, de-emphasis is accomplished with a simple resistor capacitor lowpass filter that represents the inverse transfer function characteristic of the pre-emphasis network situated at the transmitter. See the figure for a de-emphasis network. |
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