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. 2020 May 9;20(9):2700. doi: 10.3390/s20092700

Figure 2.

Figure 2

Generating the warped and down-sampled companion signal Q from the reference signal R: (a) The temporal variable shift and amplitude distortion of the exemplary signal; (b) a diagram of the companion signal generation process; (c) an example of the original signal R, the intermediate signal R, and the warped and down-sampled companion signal Q.