They mean "coding" in the information theory meaning of the word: https://en.wikipedia.org/wiki/Shannon%27s_source_coding_theorem https://en.wikipedia.org/wiki

They mean "coding" in the information theory meaning of the word: https://en.wikipedia.org/wiki/Shannon%27s_source_coding_theorem https://en.wikipedia.org/wiki/Shannon%27s_source_coding_theo... https://en.wikipedia.org/wiki/Huffman_coding https://en.wikipedia.org/wiki/Huffman_coding https://en.wikipedia.org/wiki/Arithmetic_coding https://en.wikipedia.org/wiki/Arithmetic_coding https://en.wikipedia.org/wiki/Asymmetric_Numeral_Systems https://en.wikipedia.org/wiki/Asymmetric_Numeral_Systems