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发帖数: 147 | 1 I meet a big problem about the DCT error analysis in my research.
For a discrete funtion f(i), i=0,1,...,n-1, I use the discrete cosine
transform to approximate it, which means calculate m coefficients and
approximate f(i) as f_m(x) where x=0,1,...,n-1. We know that only infinite
coefficients can approximate the original discrete function f(i) without any
error.But now since we only used m coefficients, some errors are introduced.
My problem is, how to calculate such error without any priori kno |
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