Invention Grant
- Patent Title: Optical information recording medium, recording and reproduction method, and recording and reproduction device
- Patent Title (中): 光信息记录介质，记录和再现方法以及记录和再现装置
-
Application No.: US13896791Application Date: 2013-05-17
-
Publication No.: US08804476B2Publication Date: 2014-08-12
- Inventor: Atsushi Kikugawa
- Applicant: Hitachi Consumer Electronics Co., Ltd. , Hitachi-LG Data Storage, Inc.
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Hitachi Consumer Electronics Co., Ltd.,Hitachi-LG Data Storage, Inc.
- Current Assignee: Hitachi Consumer Electronics Co., Ltd.,Hitachi-LG Data Storage, Inc.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2012-170703 20120801
- Main IPC: G11B7/24
- IPC: G11B7/24
Abstract:
In the land-groove method, wobble interference is reduced. STW modulation is used as wobble modulation for a part where wobble interference can occur, for example, a part where the configurations of both side walls of the groove are not the same and groove width modulation is unavoidable. Thereby, the amplitude of the groove width modulation can be suppressed to a quarter of that when BPSK modulation is used.
Public/Granted literature
Information query
IPC分类:
