Data compression of large scale data stored in sparse tables
US7548928B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Feb 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99945
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of compressing data in a table data structure begins by accessing a data set within the table data structure, the data set having associated therewith a range of rows of the table data structure. Data items in the data set are represented by key-value pairs. The method includes applying a first compression to the values of the key-value pairs in the data set to produce a first compressed output; applying a second compression, distinct from the first compression, to the keys of the key-value pairs in the data set to produce a second compressed output; and applying a third compression to the first compressed output and second compressed output to produce a first compressed output block, wherein the third compression is distinct from the first compression and second compression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.