Definition of Sample-rate conversion
Sample-rate conversion, sampling-frequency conversion or resampling is the process of changing the sampling rate of a discrete signal to obtain a new discrete representation of the underlying continuous signal. Application areas include image scaling and audio/visual systems, where different sampling rates may be used for engineering, economic, or historical reasons.
For example, Compact Disc Digital Audio and Digital Audio Tape systems use different sampling rates, and American television, European television, and movies all use different frame rates. Sample-rate conversion prevents changes in speed and pitch that would otherwise occur when transferring recorded material between such systems.
More specific types of resampling include: upsampling or upscaling; downsampling, downscaling, or decimation; and interpolation.
Terms mentioned above
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Frequently asked questions
What is Sample-rate conversion?
Sample-rate conversion, sampling-frequency conversion or resampling is the process of changing the sampling rate of a discrete signal to obtain a new discrete representation of the underlying continuous signal.