Window

Window

In signal processing , a window function (also known as an apodization function or tapering function [1] ) is a mathematical function that is zero-valued outside of some chosen interval . For instance, a function that is constant inside the interval and zero elsewhere is called a rectangular window , which describes the shape of its graphical representation. When another function or waveform/data-sequence is multiplied by a window function, the product is also zero-valued outside the interval: all that is left is the part where they overlap, the "view through the window".

A San Francisco detective suffering from acrophobia investigates the strange activities of an old friend's wife, all the while becoming dangerously obsessed with her.