Error correction in macro bar code symbols
US6651893B2 · kind B2 · utility
10Cited by
30References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1999 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data encoding/decoding scheme includes a plurality of bar code symbols each carrying a portion of the data in which improved error correction capabilities are incorporated. According to one aspect, once data codewords have been derived to form the symbols, a first set of data correction elements are derived from a first field, then a second set of error correction elements are derived from the data elements and the first set of error correction elements using a second, wider field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.