1. The first step in converting an analog to digital signal is called as sampling. In this the signal values are obtained from a continuous signal.
2. It basically involves breaking the continuous wave into a discrete set of points.
3. This process can be done by assuming a wave at different points and then recording those values of the wave at that point.
4. During the conversion process the input values must be kept constant in order to avoid any change.
5. In the figure sown below, the vertical line represents the points in space or time where the values of analog wave are sampled and the dots represent the actual value of the wave at that point.
6. Time dependent quantities like sound, sampling can be done at specific intervals of time to create time-discretization of signal.
7. Similarly time independent quantities like static image, sampling can be done at specific intervals of time to create space-discretization of signal.
8. Sampling usually happens at equally separated intervals, ate a rate known as sampling frequency which is determined by the Sampling theorem.
9. If a signal contains frequency components up to frequency f, then the sample frequency must be at least 2f (twice the frequency) to reconstruct the signal properly.
2. It basically involves breaking the continuous wave into a discrete set of points.
3. This process can be done by assuming a wave at different points and then recording those values of the wave at that point.
4. During the conversion process the input values must be kept constant in order to avoid any change.
5. In the figure sown below, the vertical line represents the points in space or time where the values of analog wave are sampled and the dots represent the actual value of the wave at that point.
6. Time dependent quantities like sound, sampling can be done at specific intervals of time to create time-discretization of signal.
7. Similarly time independent quantities like static image, sampling can be done at specific intervals of time to create space-discretization of signal.
8. Sampling usually happens at equally separated intervals, ate a rate known as sampling frequency which is determined by the Sampling theorem.
9. If a signal contains frequency components up to frequency f, then the sample frequency must be at least 2f (twice the frequency) to reconstruct the signal properly.
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