The Dirac Spec 2.2.0 [1] contains a typo in "Table 15.3: state[WAVELET
INDEX] == 2: Deslauriers-Debuc (13,7) lifting stages and shift values"
on page 83. The third and fifth line reads as follows:
A[2 * n] -= (-A[2 * n - 3] + 9 * A[2 * n - 1] + 9 * A[2 * n +
1]
+ A[2 * n + 3] + 16) >> 5
A[2 * n + 1] += (-A[2 * n - 2] + 9 * A[2 * n] + 9 * A[2 * n + 2]
+ A[2 * n + 4] + 8) >> 4
But they should read:
A[2 * n] -= (-A[2 * n - 3] + 9 * A[2 * n - 1] + 9 * A[2 * n +
1]
- A[2 * n + 3] + 16) >> 5
A[2 * n + 1] += (-A[2 ∗ n - 2] + 9 * A[2 * n] + 9 * A[2 ∗ n + 2]
- A[2 ∗ n + 4] + 8) >> 4
Notice the changed operators (- instead of +) before the operands A[2
∗ n + 3] and A[2 ∗ n + 4]. Now the operators correspond with the
factors in the taps array in the line before.
[1] http://dirac.sourceforge.net/DiracSpec2.2.0.pdf
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