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Decoding is the reverse process, converting these code symbols back into information Decoding (Computer Science) Decoding methods, methods in communication theory for decoding codewords sent over a noisy channel. — “Code - Wikipedia”, en.wikipedia.org
In communication theory and coding theory, decoding is the process of translating received messages into codewords of a given  Decoding conventions. Note that the probability for each codeword may not be unique: there may be more. — “Decoding methods - Wikipedia, the free encyclopedia”, en.wikipedia.org
This allows for handling a greater number of errors than that allowed by unique decoding. The unique decoding model in coding theory, which is constrained to output a single valid codeword from the received word could not tolerate greater fraction of errors. — “List-decoding - Wikipedia, the free encyclopedia”, en.wikipedia.org
I came down to breakfast next morning, after eight hours of blessed dreamless sleep, to find Sir Walter decoding a telegram in the midst of muffins and marmalade. His fresh rosiness of yesterday seemed a thought tarnished. — “The Thirty-Nine Steps” by John Buchan