upsample

upsample

(1) To make a digital image larger by adding pixels. With a quality image or photo editor, upsampling can produce a decent image. However, since pixels are created by software, no matter how good the algorithms, the larger the increase in size, the softer the resulting image. The digital zoom in a camera is an upsampling operation. Upconverting from standard TV to high-definition TV is also upsampling. Contrast with downsample. See upconvert.

(2) To make a digital audio sample larger by increasing its value. Audio upsampling is done when converting various audio sources to a common format. Contrast with downsample. See sampling.