Methods of supporting host CRC in data storage systems without RLL coding
US8020069B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Jul 5, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1866
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data dependent scrambler for a communications channel that receives a user data sequence including N symbols and host cyclic redundancy check (CRCU) bits comprises a data buffer that receives the user data sequence and the host CRCU bits. A seed finder generates a scrambling seed that is dependent upon the symbols in the user data sequence. A first scrambler receives the user data sequence from the data buffer and the scrambling seed from the seed finder and generates the scrambled user data sequence. A second scrambler generates a difference sequence that is based on the user data sequence and the scrambled user data sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.