Upsampling/Interpolation and Downsampling/Decimation

1. What is upsampling and interpolation?
2. What is upsampling and downsampling?
3. What is upsampling and downsampling in signal processing?
4. What is decimation and interpolation in DSP?

What is upsampling and interpolation?

In digital signal processing, upsampling, expansion, and interpolation are terms associated with the process of resampling in a multi-rate digital signal processing system. Upsampling can be synonymous with expansion, or it can describe an entire process of expansion and filtering (interpolation).

What is upsampling and downsampling?

Downsampling, which is also sometimes called decimation, reduces the sampling rate. Upsampling, or interpolation, increases the sampling rate. Before using these techniques you will need to be aware of the following.

What is upsampling and downsampling in signal processing?

¯ downsampling (decimation) – subsampling a discrete signal. ¯ upsampling – introducing zeros between samples to create a longer. signal. ¯ aliasing – when sampling or downsampling, two signals have same. sampled representation but differ between sample locations.

What is decimation and interpolation in DSP?

Decimation and interpolation are the two basic building blocks in the multirate digital signal processing systems. The decimator is utilized to decrease the sampling rate and interpolator to increase the sampling rate.