发明名称 |
DATA COMPRESSING APPARATUS AND A DATA DECOMPRESSING APPARATUS, A DATA COMPRESSING METHOD AND A DATA DECOMPRESSING METHOD,AND A DATA COMPRESSING OR DECOMPRESSING DICTIONARY CREATING APPARATUS AND A COMPUTER READABLE RECORDING MEDIUM STORING A DATA COMPRESSING |
摘要 |
A data compressing technique and a data decompressing technique provide a compressing dictionary storing unit for storing a compressing dictionary usable when data to be compressed is compressed, a compressing dictionary use or non-use deciding unit for deciding whether the compressing dictionary is to be used or not when the data to be compressed is compressed, and a coding unit for coding the data to be compressed on the basis of the compressing dictionary when the compressing dictionary use or non-use deciding unit decides the compressing dictionary is to be used, whereas not coding but outputting the data to be compressed when the compressing dictionary use or non-use deciding unit decides the compressing dictionary is not to be used, thereby stably achieving a preferable compression ratio for a small quantity of data such as text data in a text file or the like, besides achieving a high compression ratio for a data having different statistics.
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申请公布号 |
US2002029206(A1) |
申请公布日期 |
2002.03.07 |
申请号 |
US19980096587 |
申请日期 |
1998.06.12 |
申请人 |
SATOH NORIKO;MORIHARA TAKASHI |
发明人 |
SATOH NORIKO;MORIHARA TAKASHI |
分类号 |
G06F5/00;G06F17/21;H03M7/30;H03M7/40;(IPC1-7):G06F7/00 |
主分类号 |
G06F5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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