Title:
COMPRESSION AND EXPANSION METHOD FOR COMPUTER DATA
Document Type and Number:
Japanese Patent JP3186530
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the data compression rate and the data compression processing efficiency by applying compression processing to different records so as to compress same character strings and applying compression processing to consecutive character strings in same records.
SOLUTION: The method includes a step of 1st compression processing compressing same character strings between different records and a step for a 2nd compression processing compressing consecutive character strings in same records. In the case of compression processing, the compression processing is requested by designating an acceptance code C1 for consecutive character compression processing and inter-record compression processing and data C5 to be compressed depending on a data characteristic. Thus, in addition to the consecutive character compression processing in a conventional same record, same characters are compressed between different records and the both processing methods are combined to considerably enhance the compression rate of computer data.
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Inventors:
Takeshi Yamamoto
Application Number:
JP21069495A
Publication Date:
July 11, 2001
Filing Date:
August 18, 1995
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
H03M7/40; G06F5/00; G06F12/00; (IPC1-7): H03M7/40; G06F5/00
Domestic Patent References:
| JP3164951A | ||||
| JP4348617A | ||||
| JP63310224A | ||||
| JP62245572A | ||||
| JP36924A | ||||
| JP3162134A | ||||
| JP5260097A |
Attorney, Agent or Firm:
Hisao Fukami