Compression ratio for a compression engine
US9197243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2015 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Mar 23, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/3086
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output sequence of data elements is processed. The output sequence of data elements represents a sequence of input data elements in a compressed format. An output data element comprises a backward reference for each string in the input data elements that occurs again in an input data element that is used to produce the output data element. A backward reference identified in a selected output data element is used for selecting the string to which it refers in the stored input data elements. The selected string is combined with strings of one or more subsequent output data elements. A matching sequence in the stored input data elements matching at least part of one or more combined strings is found. A combined string of the one or more combined strings having the longest matching sequence is selected. The backward reference is redefined to indicate the longest matching sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.