Downsampling is a common technique in the field of signal processingSignal ProcessingSignal processing is the practice of analyzing, manipulating, and transforming si... Read more . It is a method used for decreasing the sampling rate of a signal by removing data points. Downsampling is a specific case of resamplingResamplingResampling is the process of changing the sampling rate or the number of samples ... Read more .
Because it assumes regular sampling, downsampling is most often applied in digital signal processingDigital Signal ProcessingDigital Signal Processing is a subfield of signal processing that deals specifica... Read more in which the discrete signals are represented as a sequence of data points. The process of downsampling removes data points from the original signal in order to reduce data volume and/or computational complexity.