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Line 1: The '''Data processing inequality''' is an [[information_theory\|information theoretic]] concept which states that the information content of a signal cannot be increased via a local physical operation. This can be expressed concisely as 'post-processing cannot increase information'.<ref name= BeaudryArxiv>{{cite journal\|last1=Beaudry\|first1=Normand\|title=An intuitive proof of the data processing inequality\|journal=arXiv\|date=2012}}</ref> As explained by ''Kinney and Atwal'', the DPI means that information is generally lost (never gained) when transmitted through a noisy channel<ref>{{cite journal\|pmid=24550517}}</ref>. ==See also==

Data processing inequality: Difference between revisions