公开(公告)号：EP0228848B1

公开(公告)日：1990-08-01

申请号：EP86309710.1

申请日：1986-12-12

申请人： SONY CORPORATION

发明人： Kimura, Shuichi ,  Hanajima, Mitsuru

IPC分类号： G11B21/08 ,  G11B7/08 ,  G11B19/20

CPC分类号： G11B19/20 ,  G11B7/085 ,  G11B21/081

公开(公告)号：EP0228848A2

公开(公告)日：1987-07-15

申请号：EP86309710.1

申请日：1986-12-12

申请人： SONY CORPORATION

发明人： Kimura, Shuichi ,  Hanajima, Mitsuru

IPC分类号： G11B21/08 ,  G11B7/08 ,  G11B19/20

CPC分类号： G11B19/20 ,  G11B7/085 ,  G11B21/081

摘要： A disc reproducing apparatus of the type having information prerecorded in the form of pits or other discrete indicia on tracks on a rotating record wherein the track access time of the information playback transducer can be increased by simultaneously increasing the rotational speed of the record from the speed normally employed during playback of the recorded information and selectively filtering out the pit component at a lower time constant when the record is rotated at such higher speed.

公开(公告)号：EP0228848A3

公开(公告)日：1988-01-07

申请号：EP86309710

申请日：1986-12-12

申请人： SONY CORPORATION

发明人： Kimura, Shuichi ,  Hanajima, Mitsuru

IPC分类号： G11B21/08 ,  G11B07/08 ,  G11B19/20

CPC分类号： G11B19/20 ,  G11B7/085 ,  G11B21/081

摘要： A disc reproducing apparatus of the type having information prerecorded in the form of pits or other discrete indicia on tracks on a rotating record wherein the track access time of the information playback transducer can be increased by simultaneously increasing the rotational speed of the record from the speed normally employed during playback of the recorded information and selectively filtering out the pit component at a lower time constant when the record is rotated at such higher speed.