Self-clocking n,k code word without start or stop
US7124947B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | May 14, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2009/2419
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A referenceless self-clocking (n,k) bar code word allows conveyance of information without the need of any start and/or stop code pattern or other reference; a code word pattern is repeated at least in part without space therebetween according to a given n,k coding convention so that any k pair of adjacent data code elements sensed by any sensing means according to the n,k coding convention will consist of n units (e.g., bar code modules), thus allowing the data code elements of the code word to be decoded most accurately without any reference pattern. One application of this coding is on round or cylindrical objects like coins, casino chips and the like, and this coding is also well suited for linear or other coding applications wanting to convey coded information without the use of a start/stop code or reference pattern using n,k coding. This coding may or mayn't include error control, for example, as disclosed herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.