公开(公告)号：JPH08171724A

公开(公告)日：1996-07-02

申请号：JP31631994

申请日：1994-12-20

Applicant: SONY CORP

Inventor： HORIGOME TOSHIHIRO ,  KOBAYASHI SEIJI ,  YOOSUTOPIITADE KOTSUKU

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/013 ,  G11B11/105 ,  G11B20/10 ,  G11B20/18 ,  G11B27/36

Abstract: PURPOSE: To enable recording at a higher density. CONSTITUTION: The learning data generated by a learning data generating circuit 2 is recorded on a disk 5 and is reproduced in actuality by a player 6. The inter-symbol interference in the learning data is measured in an inter- symbol interference measuring section 21. The preemphasis correction value corresponding to the measured inter-symbol interference is calculated in a preemphasis correction value calculating section 22. The result of the calculation is recorded as a table of a ROM 18 of a recording edge position calculating circuit 17. This recording edge position calculating circuit 17 processes the recording data outputted by an information source 1 in correspondence to the table recorded in this ROM 18.