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Adaptive predictive coding (APC) is a narrowband analog-to-digital conversion that uses a one-level or multilevel sampling system in which the value of the signal at each sampling instant is predicted according to a linear function of the past values of the quantized signals.cite-ref-keiser2012-1-0[1]

APC is related to linear predictive coding (LPC) in that both use adaptive predictors. However, APC uses fewer prediction coefficients, thus requiring a higher sampling rate than LPC.

cite-note-keiser2012-11. ↑ citerefkeiserstrange2012Keiser, Bernard E.; Strange, Eugene (2012). Digital Telephony and Network Integration. Springer Science & Business Media. p. 94. ISBN 9781461517870. Retrieved 5 April 2018.

This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22.