Storage device, controller, and recording and reproducing method
US9489977B1 · kind B1 · utility
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4References
20Claims
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Key dates
| Filing date | Dec 4, 2015 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Dec 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1496
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, there is provided a storage device including a data converter, a recording medium, and an equalizer. The data converter converts data into sets of n number of four-ary symbols according to mapping rules in which 22n-1 or fewer types of bit labels are mapped onto the n number of four-ary symbols, where n is an integer of two or greater. Onto the recording medium, the converted n number of four-ary symbols are recorded in the form of a signal of one level among four levels. The equalizer equalizes a signal read from the recording medium into sets of the n number of four-ary symbols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.