Which of the following is not a property of pdf of speech signals?(a) Non uniformity(b) Very high probability of non-zero amplitudes(c) Significant probability of very high amplitudes(d) Increasing function of amplitudes between these extremesI have been asked this question in an international level competition.This intriguing question comes from Characteristics of Speech Signals in section Speech Coding of Wireless/Mobile

Which of the following is not a property of pdf of speech signals?(a)

1.	Which of the following is not a property of pdf of speech signals?(a) Non uniformity(b) Very high probability of non-zero amplitudes(c) Significant probability of very high amplitudes(d) Increasing function of amplitudes between these extremesI have been asked this question in an international level competition.This intriguing question comes from Characteristics of Speech Signals in section Speech Coding of Wireless/Mobile
Answer» The correct answer is (d) Increasing function of AMPLITUDES between these extremes Best explanation: There is a non-uniform PROBABILITY distribution of speech amplitude. The PDF of a speech signal is in general characterized by a very high probability of non-zero amplitudes, a SIGNIFICANT probability of very high amplitudes, and a MONOTONICALLY decreasing function of amplitudes between these extremes.

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