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Companding
In telecommunication, a companding is an operation in which the dynamic range of signals is compressed before transmission and is expanded to the original value at the receiver.
Note: The use of companding allows signals with a large dynamic range to be transmitted over facilities that have a smaller dynamic range capability. Companding reduces the noise and crosstalk levels at the receiver.
Source: from Federal Standard 1037C and from MIL-STD-188
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