Signal processing device, signal processing method, and program
AssigneeSony Group Corporation
InventorSatoru Higashino
Life of this patent
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Abstract
There is provided a signal processing device, a signal processing method, and a program capable of improving noise resistance in high linear density recording. Partial response (PR) equalization of a reproduced signal of multilevel codes of 3<=ML is performed and maximum likelihood decoding of an equalized signal obtained through the PR equalization is performed. The present technology can be applied to, for example, a recording/reproducing device or the like such as an optical disc.
Claims12
A signal processing device comprising:
- an equalization unit configured to perform partial response (PR) equalization of a reproduced signal of multilevel codes of 3<=ML;
- and
- a decoding unit configured to perform maximum likelihood decoding of an equalized signal obtained through the PR equalization,
- wherein the decoding unit limits a trellis state and a branch by an encoding rule of the multilevel codes and performs the maximum likelihood decoding.
A signal processing method comprising:
- performing partial response (PR) equalization of a reproduced signal of multilevel codes of 3<=ML;
- and
- performing maximum likelihood decoding of an equalized signal obtained through the PR equalization,
- wherein a trellis state and a branch are limited by an encoding rule of the multilevel codes.
A non-transitory computer-readable medium having embodied thereon a program, which when executed by a computer causes the computer to execute a signal processing method, the method comprising:
- performing partial response (PR) equalization of a reproduced signal of multilevel codes of 3<=ML;
- and
- performing maximum likelihood decoding of an equalized signal obtained through the PR equalization,
- wherein a trellis state and a branch are limited by an encoding rule of the multilevel codes.
Dependencies are inferred from the claim text.