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Please use this identifier to cite or link to this item: http://hdl.handle.net/11133/1054

Title: 動的ハフマン符号を同期させた動的辞書法による1パスデータ圧縮
Other Titles: ドウテキ ハフマン フゴウ オ ドウキサセタ ドウテキ ジショホウ ニヨル 1パス データ アッシュク
A One-Pass Data Compression by Dynamic Dictionary Method Synchronized with Dynamic Huffman Codes
Authors: 伊藤, 雅
ITOH, Masaru
Issue Date: 31-Mar-1998
Publisher: 愛知工業大学
Abstract: This paper proposes a new data compression algorithm. In the dynamic dictionary method, when building the dictionary from an original file, a large number of single characters appear. Each character is usually put into a file with fixed-length bits. The performance of compression ratio can be improved by using the dynamic Huffman codes which is assigned to a part of this output procedure. The features of our algorithm are that it is a one-pass data compression and that it is reversible coding. It is necessary that both dictionary tree and dynamic Huffman tree must be synchronously updated, when encoding a sequential of characters from input file to output one. The algorithm utilizes LRU (Least Recently Used) queue for deleting a dictionary item when the dictionary is full.
URI: http://hdl.handle.net/11133/1054
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