... theory of digital signal processing (DSP) and implementation ofthe theory by devices embedded in what are known as digital signal processors( DSPs). Of course, the theory of digital signal processing ... called the digital signal. Although there is a difference betweenthe discrete-time signal and digital signal, in the next few chapters we assumethat the signals are discrete-time signals and ... analog signals were con-verted to sampled data signals by these filters and the signal processing wastreated as analog signal processing. But later, the signals were transitioned asdiscrete-time signals,...