Time-Domain Representation Discrete-Time Signals and Systems--Digital Signal Processing Signals represented as sequences of numbers, called samples Sample value of a typical signal or sequence denoted as x(n)with n being an integer in the range-o≤n≤o x(n)defined only for integer values of n and undefined for non-integer values of n Discrete-time signal represented by {x(n)} 上游充通大Time-Domain Representation  Signals represented as sequences of numbers, called samples  Sample value of a typical signal or sequence denoted as x (n) with n being an integer in the range －∞≤n≤∞  x(n) defined only for integer values of n and undefined for non-integer values of n  Discrete-time signal represented by {x (n)} Discrete-Time Signals and Systems —— Digital Signal Processing