1.In most cases, these signals originate as sensory data from the real world: seismic vibrations visual images, sound waves, etc.DSP isthe mathematics, the algorithms, and the techniques used to manipulate these signals after they have been converted into a digital form.在大多数情况下，这些信号来源于人对真实世界的感觉，比如地震的震动，视觉图像，声音波形等。数字信号处理是一种数学工具，是一种用来处理那些将上述信号转换成数字形式后的信号的算法和技术。2.Fouriers representation of functionsas a superposition of sines and cosines has become Ubiquitous for both the analytic and numer
