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Upsampling

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).[1][2][3] When upsampling is performed on a sequence of samples of a signal or other continuous function, it produces an approximation of the sequence that would have been obtained by sampling the signal at a higher rate (or density, as in the case of a photograph). For example, if compact disc audio at 44,100 samples/second is upsampled by a factor of 5/4, the resulting sample-rate is 55,125.

Fig 1: Depiction of one dot product, resulting in one output sample (in green), for the case L=4, n=9, j=3. Three conceptual "inserted zeros" are depicted between each pair of input samples. Omitting them from the calculation is what distinguishes a multirate filter from a monorate filter.
  1. ^ Cite error: The named reference Oppenheim was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Crochiere was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Poularikas was invoked but never defined (see the help page).

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Augment de mostreig (processament del senyal) Catalan Upsampling German 업샘플링 Korean Ultraeșantionare Romanian Увеличение разрешения Russian 升採樣 Chinese

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