Method and apparatus for encoding data incorporating check bits and maximum transition run constraint
US6526530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M5/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for encoding data using check bits for additional data protection, in addition to the time-varying maximum transition run code which eliminates data patterns producing long runs of consecutive transitions. The check bits are inserted into codewords in preselected locations. The time-varying maximum transition run code does not permit more than j transitions beginning from an even-numbered sample period and does not permit more than j+l transitions beginning from an odd-numbered sample period, wherein j>1. This time-varying maximum transition run constraint is preserved even after the check bits are inserted, regardless of the bit values of the check bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.