The strategy of discrete-time signal processing also refers to the theoretical willpower that establishes a mathematical foundation for digital signal processing, without having using quantization error into account. The reduction of noise is covered partly underneath the heading of signal integrity. The separation of sought after signals from background noise https://sites.gsu.edu/vjohnson30/2016/02/04/how-to-enable-comments-for-dummi-college-students/comment-page-2161/#comment-173878