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

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Presentation transcript:

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 Information extraction Speech coding, music coding, data compression communication over noisy channels 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.

DSP block diagram 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.

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 continuous-time signal at discrete-time instant

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