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In PCM encoding, quantization level varies as a function of ________

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In PCM encoding, quantization level varies as a function of ________

(a) Frequency

(b) Amplitude

(c) Square of frequency

(d) Square of amplitude

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Enquiry is from Pulse Code Modulation in portion Formatting and Baseband Modulation of Digital Communications

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Right choice is (b) Amplitude

For explanation I would say: In linear PCM the quantization levels are uniform. But in normal PCM encoding the quantization level vary according to the amplitude, based of A-law of Myu-law.

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