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Auto correlation function measures______ between samples of a speech signal as a function of _______

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Auto correlation function measures______ between samples of a speech signal as a function of _______

(a) Similarity, frequency

(b) Dissimilarity, time

(c) Similarity, time

(d) Dissimilarity, frequency

The question was posed to me in an international level competition.

My question is taken from Characteristics of Speech Signals topic in section Speech Coding of Wireless/Mobile

1 Answer

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Best answer
Right option is (c) Similarity, time

Best explanation: The autocorrelation function (ACF) gives a quantitative measure of the closeness or similarity between samples of a speech signal as a function of their time separation. In every sample of speech, there is a large component that is easily predicted from the values of the previous samples.

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