| 摘要 |
PROBLEM TO BE SOLVED: To reduce the storage capacity of a memory by eliminating the need for providing many Huffman code tables. SOLUTION: This device consists of a Huffman encoding means 6, which transforms a symbol into a code word according to a contrast table of short code words assigned corresponding to the order of the global generation frequencies of symbols, a comparing means 2 which compares the symbols with a threshold, and a decision counter 3 which stores either the number of symbols larger or smaller than the threshold through the comparison by the comparing means 2. The Huffan encoding means 6 changes the allocation of code words of the contrast table into symbols, based on the value of the decision counter 3 in a local period.
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