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Answers for “定长码的定义是什么?”

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A fixed-length code is a code in which every source symbol is represented by a codeword containing the same number of bits. The defining property is the equality of codeword length across all symbols, not the equality of the codeword contents themselves.

Conditions: Applies to a single code mapping across all symbols in its alphabet.; The defining property is equality of codeword length, not equality of codeword content.

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A variable-length code is a code whose codewords do not all have the same length. The condition requires that at least two codewords in the code have different bit lengths.

Conditions: Applies to a single code mapping across all symbols in its alphabet.; At least two codewords in the code have different bit lengths.