Lab · convolution
Sliding convolution
Step across a short signal and inspect the exact sum produced by a three-tap kernel.
Interactive experiment
One output, multiply by multiply
Which input values contribute to one sample of a three-tap smoothing filter?
Blue is the input and dashed amber is the full output. The moving window and filled blue points show the samples under the kernel; the large amber point is the selected output. The fixed kernel is [0.25, 0.5, 0.25].