Upsampling

Upsampling is a common technique in the field of

. It is a method used for increasing the sampling rate of a signal. Upsampling is a specific case of .

Because it assumes regular sampling, upsampling is most often applied in

in which the discrete signals are represented as a sequence of data points. The process of upsampling (also referred to as "upscaling" or "interpolation") adds more data points to the original signal without changing its basic contents. The new data points are added in between the existing ones (hence the term "interpolation"), thereby increasing the density, resolution and granularity of the signal.

Upsampling is generally used to improve a signal and applications include improving the quality of images, increasing the accuracy of digital filters, or data enrichment.

Upsampling Resources

Check out the upsampling tutorial to get some hands-on experience with resampling methods.