Multi-level run-length limited finite state machine for magnetic recording channel
US8854755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Oct 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10277
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system is described for constructing maximum transition run modulation code based upon a multi-level run-length limited finite state machine. A processor is configured to receive information from a hard disk drive via a read channel and recover data from the hard disk drive using maximum transition run modulation code. A memory has computer executable instructions configured for execution by the processor to model a magnetic recording channel as a partial response channel, model a source of information to the magnetic recording channel to provide an optimized Markov source, and construct a maximum transition run modulation code to mimic the optimized Markov source based upon a finite state machine having a limited transition run length and a multi-level periodic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.