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本文介绍一种新的变换——相移cosine变换(PSCT)。PSCT几乎可以把一阶马尔柯夫系列的偶部的协方差矩阵对角化。本文还建立起几种衡量一种变换与Karhunen-Loeve变换(KLT)接近程度的则准。所有这些准则都表明PSCT比第Ⅱ种cosine变换(DCT-Ⅱ)更接近于KLT。
A new transform
the phase shift cosine transform (PSCT)
is introduced. It almost diagonizes the covariance matrix of the even part of a high correlated Markov-Ⅰ sequence. Several criteria are established for measuring the closeness of a transform to the Kar-hunen-Loeve transform (KLT). All these criteria show that the PSCT measures closer to the even part of the KLT than the version-Ⅱ of the discrete cosine transform (DCT-Ⅱ).
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