DSP digital signal processing DSP deals with commonly

DSP (digital signal processing) (DSP) deals with commonly signals such as speech, music, video, EKG or ECG (heart), and EEG (brain).

Applications of DSP Signal transmission /storage/retrieval Speech coding , music coding, data compression communication over noisy channels Information extraction Radar and sonar signal processing Speech , image and character recognition

Preparing the analog signal for communication through a communication channel

Analyzing the analog signal for use in a voice recognition telephone system.

SIGNALS, SYSTEMS, AND SIGNAL PROCESSING A signal is defined as any physical quantity that vary with time or any independent variables A system may also be defined as a physical device that performs an operation on a signal A Signal processing is the operations that performed on the signal means processed the signal. DSP block diagram

Classification of signals: • Multi channel and multi dimension signals • Continuous Time versus Discrete Time Signal • Continuous – Valued versus Discrete – Valued Signals • Deterministic signal and Random signal

Analog-To-Digital convertor • Sampler • Quantization • Coding.

Sampling of analog signal This is the conversion of a continuous-time signal into discrete -time signal obtained by taking samples of the continuoustime signal at discrete-time instant

The sampling theorem introduced by Nyquist and later by Shannon is used to determine the appropriate sampling rate Fs≥ 2 Fmax