Howtosignalprocessing
- What is downsample and upsample?
- Is it better to downsample or upsample?
- Is it possible to Upsample the signal?
- What is the effect of upsampling and downsampling?
What is downsample and upsample?
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.
Is it better to downsample or upsample?
It depends on the level of certainty you need. If you don't need mathematical certainty and just want a heuristic, downsampling is faster and upsampling is more accurate.
Is it possible to Upsample the signal?
Upsampling is the process of inserting zero-valued samples between the original samples of a signal to increase the sampling rate. One way to accomplish upsampling by an integer ratio of 1:D is to interpose D-1 zero samples between each pair of the input samples of the signal.
What is the effect of upsampling and downsampling?
Downsampling is the reduction in spatial resolution while keeping the same two-dimensional (2D) representa- tion. It is typically used to reduce the storage and/or transmission requirements of images. Upsampling is the increasing of the spatial resolution while keeping the 2D representation of an image.
