International Journal of Alzheimer’s Disease / 2011 / Article / Fig 1

Research Article

Slowing and Loss of Complexity in Alzheimer's EEG: Two Sides of the Same Coin?

Figure 1

Wavelet transform realization via lifting scheme (a) Forward transformation. (b) Inverse transformation. The boxes labeled by stand for delays (over one sample). The boxes and represent downsampling and upsampling by a factor of two, respectively; in the latter a zero is inserted after every sample, whereas in the former, every second sample is removed. The lifting scheme repeats two primitive steps: prediction and update .

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