Storage device, controller, and recording and reproducing method
AssigneeKabushiki Kaisha Toshiba
InventorsKohsuke Harada, Akihiro Yamazaki, Tomokazu Okubo
Life of this patent
Estimating the term…
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.
Claims20
A storage device comprising:
- a data converter that 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;
- a recording medium onto which the converted n number of four-ary symbols are recorded in the form of a signal of one level among four levels;
- and
- an equalizer that equalizes a signal read from the recording medium into sets of the n number of four-ary symbols.
A controller comprising:
- a data converter that 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;
- a signal generator that generates a signal of one level among four levels based on the converted n number of symbols;
- and
- an equalizer that equalizes a signal input externally into sets of the n number of four-ary symbols.
A recording and reproducing method comprising:
- converting 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;
- recording the converted n number of symbols in the form of a signal of one level among four levels onto a recording medium;
- and
- equalizing a signal read from the recording medium into sets of the n number of four-ary symbols.
Dependencies are inferred from the claim text.