Upsampling vs downsampling. Which to use when?

1. Which is better Upsampling or downsampling?
2. When should you downsample?
3. Where is Upsampling used?
4. Why do we use Upsampling?
5. Where is downsampling used?
6. What is the benefit to downsampling?

Which is better Upsampling or 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.

When should you downsample?

Answering Jessica's question directly - one reason for downsampling is when you're working with a large dataset and facing memory limits on your computer or simply want to reduce processing time.

Where is Upsampling used?

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).

Why do we use Upsampling?

The purpose of Upsampling is to manipulate a signal in order to artificially increase the sampling rate. This is done by... Upsampling is an effective way to reduce time between samples of a signal without resampling the original signal.

Where is downsampling used?

(1) To make a digital audio signal smaller by lowering its sampling rate or sample size (bits per sample). Downsampling is done to decrease the bit rate when transmitting over a limited bandwidth or to convert to a more limited audio format.

What is the benefit to downsampling?

It makes the data of a more manageable size. Reduces the dimensionality of the data thus enabling in faster processing of the data (image) Reducing the storage size of the data.