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preemphasis

   Also found in: Wikipedia 0.03 sec.
preemphasis [prē′em·fə·səs]
(electronics)
A process which increases the magnitude of some frequency components with respect to the magnitude of others to reduce the effects of noise introduced in subsequent parts of the system.


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With speech, the preemphasis and AGC in the standard speech processor (Figure 29(a)) reduce the intensity range of all the frequencies.
Many backplanes have demonstrated more than 10 Gbps operation with conventional FR-4, preemphasis and equalization and with back drilled vias.
Specifically, the company elected to dynamically vary the preemphasis characteristics in order to match the input signal spectrum to the transmission channel.
 
 
 
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