Lesson 1 Introduction to digital signal processing

discretization of time:

samples replace idealized models

simple math replaces calculus

discretization of values:

general-purpose storage

general-purpose processing(CPU)

noise can be controlled

Lesson 2 Discrete-time signals

Basic Signals

Elementary Operators

Shift(mind the difference between shiftings on Periodic Signals and Finite-Support Signals)

Scaling

Sum

Product

Energy and Power

Classes of Discrete-Time Signals

Finite-Length Signals

Periodic Signals

Finite-Support Signals