公开(公告)号：CA2049706C

公开(公告)日：2000-11-14

申请号：CA2049706

申请日：1991-08-22

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36 ,  G11B7/24

Abstract: A disc-shaped recording medium and a recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium, are disclosed. The recording medium has a diameter of not more than 80 mm, and a recording track is formed on the recording medium with a track pitch of approximately 1 .6m. An information in excess of 130 Mbytes is recorded in a data compressed state on the recording track and the recording medium is rotationally driven at a constant linear velocity for recording and optically reproducing the information. The recording/reproducing apparatus employing the disc-shaped recording medium as a recording medium includes a buffer memory between a data compressing circuit for compressing input digital data and a recording encoding circuit for processing the compressed data by modulation suitable for recording, as long as a recording system of the apparatus is concerned, and a buffer memory between a playback decoding circuit for processing the compressed data by error correct ion decoding and demodulation complementary to the modulation and a data expansion circuit for expandihg the compressed data to the original state. By suitably selecting,the capacity of the buffer memories, recording and reproduction may continue satisfactorily even if the scanning position of the recording head and the optical head undergoes track jump during recording or reproduction.

公开(公告)号：CA2049706A1

公开(公告)日：1992-02-24

申请号：CA2049706

申请日：1991-08-22

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36 ,  G11B7/24

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：DE69126749D1

公开(公告)日：1997-08-14

申请号：DE69126749

申请日：1991-08-08

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36 ,  G11B21/10

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：AU8269691A

公开(公告)日：1992-02-27

申请号：AU8269691

申请日：1991-08-22

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：DE69126749T2

公开(公告)日：1997-10-23

申请号：DE69126749

申请日：1991-08-08

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36 ,  G11B21/10

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：DE3272420D1

公开(公告)日：1986-09-11

申请号：DE3272420

申请日：1982-04-02

Applicant: SONY CORP

Inventor： OHGA NORIO

IPC: B41M5/24 ,  G11B7/24

公开(公告)号：CA1207443A

公开(公告)日：1986-07-08

申请号：CA399564

申请日：1982-03-26

Applicant: SONY CORP

Inventor： OHGA NORIO

IPC: B41M5/24 ,  G11B7/24

Abstract: A record carrier has a spiral track in which sound and/or video information is stored formed in a transparent substrate and covered by a reflecting layer of metallic material for reflecting a reading beam. The metallic layer does not extend to the inner and/or the outer edge portion of the substrate and is covered by a protective layer. The protective layer is extended to the inner and/or the outer edge portion of the substrate so as to seal the metallic layer for preventing oxidation thereof.

公开(公告)号：AT155274T

公开(公告)日：1997-07-15

申请号：AT91307287

申请日：1991-08-08

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36 ,  G11B21/10

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：AU641536B2

公开(公告)日：1993-09-23

申请号：AU8269691

申请日：1991-08-22

Applicant: SONY CORP

Inventor： OHGA NORIO ,  TSURUSHIMA KATSUAKI ,  YOSHIDA TADAO

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B20/00 ,  G11B20/10 ,  G11B21/08 ,  G11B27/00 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/36

Abstract: A disc-shaped recording medium (1) has a diameter of not more the 80 mm and a recording track pitch of approximately 1.6 mu m. In excess of 130 Mbytes of information is recorded in a data compressed state on the medium (1), which is rotationally driven at a constant linear velocity for recording and optically reproducing the information. A recording/reproducing apparatus for the medium (1) includes a buffer memory (23) between a data compressing circuit (23) for compressing input digital data and a recording encoding circuit (26, 27) for processing the compressed data by modulation suitable for recording, and a buffer memory (25) between a playback decoding circuit (33, 26) and a data expansion circuit (23) for expanding the compressed data to the original state. The capacity of the buffer memories (25) is selected such that recording and reproduction may continue satisfactorily even if there is a track jump during recording or reproduction.

公开(公告)号：AT21295T

公开(公告)日：1986-08-15

申请号：AT82301763

申请日：1982-04-02

Applicant: SONY CORP

Inventor： OHGA NORIO

IPC: B41M5/24 ,  G11B7/24