de-emphasis

A systematic process designed to decrease, within a band of frequencies, the magnitude of some frequencies with respect to the magnitude of others.

In telecommunication, de-emphasis is a systematic process designed to decrease, within a band of frequencies, the magnitude of some (usually higher) frequencies with respect to the magnitude of other (usually lower) frequencies. It is the complement of pre-emphasis, in the antinoise system called emphasis. De-emphasis is done in order to improve the overall signal-to-noise ratio by minimizing the adverse effects of such phenomena as attenuation distortion or saturation of recording media in subsequent parts of the system.

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Adapted from content published on wikipedia.org
Last modified on April 24, 2021, 10:09 pm
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