公开(公告)号：US20210398554A1

公开(公告)日：2021-12-23

申请号：US17353820

申请日：2021-06-22

申请人： FUJIFILM Corporation

发明人： Atsushi MUSHA ,  Yoshihiro OKAMOTO ,  Yasuaki NAKAMURA ,  Madoka NISHIKAWA

IPC分类号： G11B5/008 ,  G11B5/48 ,  G06N3/08

摘要： A signal processing device includes a receiver that receives a plurality of playback signal sequence obtained by digitizing a plurality of reading results by a plurality of A/D converter, the plurality of reading results being obtained by reading data by a plurality of reading elements from a magnetic tape and a plurality of equalizers that perform waveform equalization of the plurality of playback signal sequence. The plurality of equalizers perform the waveform equalization by using a plurality of non-linear filters that have been learned to reduce distortion that occurs non-linearly in the plurality of playback signal sequence according to a condition under an environment in which the data is read from the magnetic tape. The plurality of non-linear filters being optimized to a suitable characteristic for the plurality of reading elements by optimization based on the plurality of reading results.