发明名称 |
Data reducing method, system and program |
摘要 |
There are provided method, system and program for decreasing the amount of information by causing a distributor or user to determine a period for retention of digital information in advance and deteriorating digital information lowered in utilization value as the time elapses. The digital information is assigned with a compression ratio or a period for retaining the information amount (life). As the time elapses, old information is reduced in accordance with a degree of importance of the digital information. Deterioration has the meaning of erasing a predetermined item of the digital information or compressing the digital information through a predetermined method. By deteriorating the information, the information amount can be reduced.
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申请公布号 |
US2003009486(A1) |
申请公布日期 |
2003.01.09 |
申请号 |
US20020180533 |
申请日期 |
2002.06.27 |
申请人 |
HITACHI, LTD. |
发明人 |
SHIMADA NAOKI;HIRABAYASHI MOTOAKI;OHFUJI TAKASHI |
分类号 |
G06F17/30;(IPC1-7):G06F17/30 |
主分类号 |
G06F17/30 |
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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