-
公开(公告)号：EP1438717B1
公开(公告)日：2006-01-11
申请号：EP02777849.7
申请日：2002-10-16
申请人： Koninklijke Philips Electronics N.V. , MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. , SONY CORPORATION
发明人： HEEMSKERK, Jacobus, Petrus Josephus , SCHEP, Cornelis, Marinus , STEK, Aalbert , FURUMIYA, Shigeru , ISHIBASHI, Hiromichi , MINAMINO, Junichi , OGAWA, Hiroshi, SONY CORPORATION , MASUHARA, Shin, SONY CORPORATION , SANO, Tatsushi, SONY CORPORATION
CPC分类号： G11B7/007 , G11B7/24082 , G11B27/24 , G11B2220/216 , G11B2220/218 , G11B2220/2529 , G11B2220/2545 , G11B2220/2562 , G11B2220/2575
摘要： The S/N ratio is improved for recording data to grooves (2-1, 2-2) of an optical disc so that as much information as possible can be recorded at the lowest possible frequency band. An optical disc using wobble patterns to record different information has a first groove (2-1) having a first wobble pattern (22) in which one wobble period has a sharp rising edge and a gradual falling edge; and a second groove (2-2) having a second wobble pattern (24) in which one wobble period has a gradual rising edge and a sharp falling edge. Each of the first and the second wobble pattern is represented by a first fundamental and a second harmonic of a Fourier series. The polarity of the second harmonic, which is an even harmonic, of the second wobble pattern is opposite that of the first wobble pattern. A method for manufacturing this optical disc is also provided.
-
公开(公告)号：EP1438717B8
公开(公告)日：2007-10-10
申请号：EP02777849.7
申请日：2002-10-16
申请人： Koninklijke Philips Electronics N.V. , MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD , Sony Corporation
发明人： HEEMSKERK, Jacobus, Petrus Josephus , SCHEP, Cornelis, Marinus , STEK, Aalbert , FURUMIYA, Shigeru , ISHIBASHI, Hiromichi , MINAMINO, Junichi , OGAWA, Hiroshi, SONY CORPORATION , MASUHARA, Shin, SONY CORPORATION , SANO, Tatsushi, SONY CORPORATION
CPC分类号： G11B7/007 , G11B7/24082 , G11B27/24 , G11B2220/216 , G11B2220/218 , G11B2220/2529 , G11B2220/2545 , G11B2220/2562 , G11B2220/2575
摘要： The S/N ratio is improved for recording data to grooves (2-1, 2-2) of an optical disc so that as much information as possible can be recorded at the lowest possible frequency band. An optical disc using wobble patterns to record different information has a first groove (2-1) having a first wobble pattern (22) in which one wobble period has a sharp rising edge and a gradual falling edge; and a second groove (2-2) having a second wobble pattern (24) in which one wobble period has a gradual rising edge and a sharp falling edge. Each of the first and the second wobble pattern is represented by a first fundamental and a second harmonic of a Fourier series. The polarity of the second harmonic, which is an even harmonic, of the second wobble pattern is opposite that of the first wobble pattern. A method for manufacturing this optical disc is also provided.
-
公开(公告)号：EP1438717A1
公开(公告)日：2004-07-21
申请号：EP02777849.7
申请日：2002-10-16
申请人： Koninklijke Philips Electronics N.V. , Matsushita Electric Industrial Co., Ltd. , Sony Corporation
发明人： HEEMSKERK, Jacobus, Petrus Josephus , SCHEP, Cornelis, Marinus , STEK, Aalbert , FURUMIYA, Shigeru , ISHIBASHI, Hiromichi , MINAMINO, Junichi , OGAWA, Hiroshi,SONY CORPORATION , MASUHARA, Shin,SONY CORPORATION , SANO, Tatsushi,SONY CORPORATION
CPC分类号： G11B7/007 , G11B7/24082 , G11B27/24 , G11B2220/216 , G11B2220/218 , G11B2220/2529 , G11B2220/2545 , G11B2220/2562 , G11B2220/2575
摘要： The S/N ratio is improved for recording data to grooves (2-1, 2-2) of an optical disc so that as much information as possible can be recorded at the lowest possible frequency band. An optical disc using wobble patterns to record different information has a first groove (2-1) having a first wobble pattern (22) in which one wobble period has a sharp rising edge and a gradual falling edge; and a second groove (2-2) having a second wobble pattern (24) in which one wobble period has a gradual rising edge and a sharp falling edge. Each of the first and the second wobble pattern is represented by a first fundamental and a second harmonic of a Fourier series. The polarity of the second harmonic, which is an even harmonic, of the second wobble pattern is opposite that of the first wobble pattern. A method for manufacturing this optical disc is also provided.
-
-
搜索结果
3 条记录 (耗时 0.018 秒)
