公开(公告)号：DE69828124D1

公开(公告)日：2005-01-20

申请号：DE69828124

申请日：1998-01-06

Applicant: SONY CORP

Inventor： KUMAGAI EIJI ,  NAGASHIMA KENJI ,  TSUKADA FUTOSHI

IPC: G11B19/12

Abstract: A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.

公开(公告)号：DE69828124T2

公开(公告)日：2005-12-22

申请号：DE69828124

申请日：1998-01-06

Applicant: SONY CORP

Inventor： KUMAGAI EIJI ,  NAGASHIMA KENJI ,  TSUKADA FUTOSHI

IPC: G11B19/12

Abstract: A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.

公开(公告)号：ID29701A

公开(公告)日：2001-09-27

申请号：ID20010247

申请日：2001-03-22

Applicant: SONY CORP

Inventor： TSUKADA FUTOSHI

IPC: G11B7/0037 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/007 ,  G11B20/12 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/32

Abstract: An optical disc having a data area in which information signals are recorded, a lead-in area and a lead-out area provided before and after the data area, and a program memory area for temporarily storing address information necessary for additionally writing information signals. A subcode Q of the lead-in area or a subcode Q of the program memory area is provided with identification information for identifying these subcodes Q. For example, the identification information is provided at least in one of address (ADR), track number (TNO), and zero (ZERO) constituting the subcode Q of the program memory area or the lead-in area. Thus, it is possible to discriminate the subcode Q of the program memory area and the subcode Q of the lead-in area securely and instantaneously.

公开(公告)号：MY123157A

公开(公告)日：2006-05-31

申请号：MYPI9800097

申请日：1998-01-09

Applicant: SONY CORP

Inventor： KUMAGAI EIJI ,  NAGASHIMA KENJI ,  TSUKADA FUTOSHI

IPC: G11B19/12

Abstract: A LASER LIGHT BEAM IS ILLUMINATED VIA AN OBJECTIVE LENS ON THE SIGNAL SURFACE OF AN OPTICAL DISC (100, 110, 120) AN THE OBJECTIVE LENS IS DISPLACED BY A SERVO PROCESSOR ALONG THE OPTICAL AXIS FOR FOCUSSING SEARCH TO GENERATE FOCUSSING ERROR SIGNAL (FE) BY A RF BLOCK FROM A DETECTED OUTPUT OF THE LASER LIGHT BY THE SIGNAL SURFACE OF THE OPTICAL DISC. BASED ON THESE FOCUSSING ERROR SIGNALS (FE), A SYSTEM CONTROLLER DISCRIMINATES THE TYPES OF THE OPTICAL DISC HAVING DIFFERENT NUMBERS OF SIGNAL RECORDING LAYERS FOR SETTING AN OPERATING MODE IN KEEPING WITH THE TYPES OF THE OPTICAL DISC.

公开(公告)号：AU2984501A

公开(公告)日：2001-09-27

申请号：AU2984501

申请日：2001-03-23

Applicant: SONY CORP

Inventor： TSUKADA FUTOSHI

IPC: G11B7/0037 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/007 ,  G11B20/12 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/32 ,  G11B7/0045 ,  G11B7/30

Abstract: An optical disc having a data area in which information signals are recorded, a lead-in area and a lead-out area provided before and after the data area, and a program memory area for temporarily storing address information necessary for additionally writing information signals. A subcode Q of the lead-in area or a subcode Q of the program memory area is provided with identification information for identifying these subcodes Q. For example, the identification information is provided at least in one of address (ADR), track number (TNO), and zero (ZERO) constituting the subcode Q of the program memory area or the lead-in area. Thus, it is possible to discriminate the subcode Q of the program memory area and the subcode Q of the lead-in area securely and instantaneously.

公开(公告)号：MY129202A

公开(公告)日：2007-03-30

申请号：MYPI20012176

申请日：2001-05-10

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI ,  SHISHIDO YUKIO ,  TSUKADA FUTOSHI ,  MIYAKE KUNIHIKO

IPC: G11B7/007 ,  G11B7/004 ,  G11B7/085 ,  G11B7/09 ,  G11B20/14 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30

Abstract: PHYSICAL ADDRESSES OF THE RECORDING AREAS PROVIDED ON AN OPTICAL DISC ARE REPRESENTED IN A TIME-AXIS DATA FORMAT AND IN A BINARY DATA FORMAT. THE PHYSICAL ADDRESS VALUE GRADUALLY INCREASES FROM THE INNER PART OF THE DISC TO THE OUTER PART OF THE DISC, WHILE THE FORMATS REMAIN IN ONE-TO-ONE CORRESPONDENCE OVER THE RECORDING AREAS. THE DISTANCE THE OPTICAL HEAD (24) MUST MOVE TO REACH A TARGET RECORDING AREA CAN THEREFORE BE CALCULATED EASILY INDEPENDENTLY OF WHERE ON THE DISC THE OPTICAL HEAD (24) IS LOCATED, ENABLING THE OPTICAL HEAD (24) TO QUICKLY ACCESS THE TARGET RECORDING AREA. (FIGURE 14)

公开(公告)号：ID20980A

公开(公告)日：1999-04-01

申请号：ID980076

申请日：1998-01-06

Applicant: SONY CORP

Inventor： KUMAGAI EIJI ,  NAGASHIMA KENJI ,  TSUKADA FUTOSHI

IPC: G11B19/12 ,  C11B19/12

Abstract: A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.

公开(公告)号：EP0903735A4

公开(公告)日：2000-01-05

申请号：EP98900047

申请日：1998-01-06

Applicant: SONY CORP

Inventor： KUMAGAI EIJI ,  NAGASHIMA KENJI ,  TSUKADA FUTOSHI

IPC: G11B19/12

CPC classification number: G11B19/12

Abstract: A system controller (30) discriminates the kinds of a plurality of optical disks (D) having different numbers of signal recording layers based on a focus error signal generated by means of an RF block (21) from the output of a servo processor (31), which is outputted when the processor detects the reflected light of laser light from the signal surface of the disk (D), at the time of focusing the laser light on the signal surface of the disc (D) by displacing an objective lens in the direction of optical axis, while the signal surface of the disk (D) is irradiated with the laser light through the objective lens and sets the operation mode of the disks (D) in accordance with the kinds of the disks (D).