High rate runlength limited codes for 10-bit ECC symbols
US6259384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A methodology for designing and implementing high rate RLL codes is optimized for application to 10-bit ECC symbols, and provides rate 30/31, rate 40/41, rate 50/51 and much higher modulation code rates for use in magnetic recording channels. A relatively small subcode encoding--one easy to implement--is applied to a portion of the input stream, and the resulting base codeword is partitioned into nibbles that, in turn, are interleaved among the unencoded ECC symbols. Code constraints on the subcode word nibbles depend upon the values of adjacent unencoded symbols. The resulting codes provide excellent density and error propagation performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.