Subset averaged median predictor for differential pulse code modulation

Abstract

A predictor for differential pulse code modulation that designates a subset averaged median (SAM) predictor, which removes transmission errors and/or minimizes error propagation. The SAM predictor in a preferred embodiment operates according to SAM ⁢ ⁢ ( X ) = ∑ i = 1 P ⁢ ⁢ a i ⁢ F i ⁢ ( X ) where X is an input vector within a predictor window, P is the number of median subfilters, ai is an optionally selected coefficient and Fi( ) is a feature equation of an ith median subfilter. The coefficients ai may be selected so as to minimize a prediction error variance and to exclude first order subfilters, where ∑ i = l P ⁢ ⁢ [LeftBracketingBar] a i [RightBracketingBar] < 1 , thereby removing transmission error and minimizing prediction error variance through minimization of error propagation.

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