US 11,749,307 B2
Signal processing device, signal processing method, and program
Satoru Higashino, Kanagawa (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/783,139
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Jan. 15, 2021, PCT No. PCT/JP2021/001158
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/153260, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2020-013882 (JP), filed on Jan. 30, 2020.
Prior Publication US 2023/0043380 A1, Feb. 9, 2023
Int. Cl. G11B 20/10 (2006.01); G11B 7/005 (2006.01); G11B 20/18 (2006.01)
CPC G11B 20/10212 (2013.01) [G11B 7/005 (2013.01); G11B 20/1833 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.