Howtosignalprocessing
- What is interpolation in upsampling?
- Does upsampling improve sound quality?
- Does upsampling increase bandwidth?
- Does interpolation increase resolution?
What is interpolation in upsampling?
Upsampling adds to the original signal undesired spectral images which are centered on multiples of the original sampling rate. “Interpolation”, in the DSP sense, is the process of upsampling followed by filtering. (The filtering removes the undesired spectral images.)
Does upsampling improve sound quality?
When we upsample a 44.1kHz 16-bit file to a higher rate and depth, like 96kHz 24 bits, we typically get better sound quality.
Does upsampling increase bandwidth?
upsampling increases the *available* bandwidth, but does not in itself, create new information to fill that new available bandwidth. so proper upsampling will have some empty spectrum resulting (improper upsampling will have images but those images are not new information).
Does interpolation increase resolution?
One of the commonly used techniques for image resolution enhancement is interpolation. Interpolation increases the number of pixels in the digital image.
