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Companding is the process of

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Companding is the process of

(a) Compression

(b) Expansion

(c) Compression & Expansion

(d) None of the mentioned

The question was asked in an online quiz.

My query is from Uniform and Non Uniform Quantization topic in section Formatting and Baseband Modulation of Digital Communications

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The correct answer is (c) Compression & Expansion

The best I can explain: The given signal is first compressed using a logarithmic compressor and then it is given as input to the uniform quantizer. Both these steps together is called as companding.

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