Back استعيان Arabic Дискретизация (обработка на сигнали) Bulgarian Mostratge digital Catalan Vzorkování Czech Sampling (signalbehandling) Danish Abtastung (Signalverarbeitung) German Δειγματοληψία σήματος Greek Specimenado Esperanto Muestreo (señal) Spanish Diskreetimine Estonian

Sampling (signal processing)

For other uses, see Sampling (disambiguation).
Signal sampling representation. The continuous signal S(t) is represented with a green colored line while the discrete samples are indicated by the blue vertical lines.

In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave to a sequence of "samples". A sample is a value of the signal at a point in time and/or space; this definition differs from the term's usage in statistics, which refers to a set of such values.[A]

A sampler is a subsystem or operation that extracts samples from a continuous signal. A theoretical ideal sampler produces samples equivalent to the instantaneous value of the continuous signal at the desired points.

The original signal can be reconstructed from a sequence of samples, up to the Nyquist limit, by passing the sequence of samples through a reconstruction filter.
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