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公开(公告)号：DE69637033D1
公开(公告)日：2007-05-31
申请号：DE69637033
申请日：1996-06-18
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , KAWASHIMA ISAO , KURIHARA AKIRA , OSAWA YOSHITOMO , OWA HIDEO
IPC: G06F12/00 , G06F12/14 , G06F1/00 , G11B20/00 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/32 , H04N5/85 , H04N5/913
Abstract: An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 18 and a synchronization appendage circuit 18, used for processing input data for forming a recording signal. Not only the key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.
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公开(公告)号：DE69635312D1
公开(公告)日：2006-03-02
申请号：DE69635312
申请日：1996-06-27
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , OWA HIDEO , OSAWA YOSHITOMO , KURIHARA AKIRA , KAWASHIMA ISAO
IPC: G11B20/10 , G06F1/00 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/24 , G11B11/105 , G11B19/12 , G11B20/00
Abstract: An optical disk (D) has a first working area and a second working area having two recording formats. Encrypted data is recorded on the second working area. Encrypting key data is recorded on the first working area. The encrypting key data is used for decoding the encrypted data. This recording technique makes easy reproduction of the recorded data quite difficult. If data recorded on a bit-formed portion can be reproduced by any means, the data signal recorded on the optical disk cannot easily be reproduced.
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公开(公告)号：DE69626724T2
公开(公告)日：2004-02-05
申请号：DE69626724
申请日：1996-06-27
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , OWA HIDEO , OSAWA YOSHITOMO , KURIHARA AKIRA , KAWASHIMA ISAO
IPC: G11B20/10 , G06F1/00 , G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B11/105 , G11B19/12 , G11B20/00 , G11B7/24
Abstract: An optical disk (D) has a first working area and a second working area having two recording formats. Encrypted data is recorded on the second working area. Encrypting key data is recorded on the first working area. The encrypting key data is used for decoding the encrypted data. This recording technique makes easy reproduction of the recorded data quite difficult. If data recorded on a bit-formed portion can be reproduced by any means, the data signal recorded on the optical disk cannot easily be reproduced.
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公开(公告)号：DE69618101D1
公开(公告)日：2002-01-31
申请号：DE69618101
申请日：1996-07-17
Applicant: SONY CORP
Inventor： OSAWA YOSHITOMO , SAKO YOICHIRO , KURIHARA AKIRA , KAWASHIMA ISAO
Abstract: A signal reproducing apparatus, in which unauthorized decoding or copying is rendered difficult, reproduces enciphered data from a disk-shaped record medium (101) on which are recorded data enciphered by at least one encryption operation and key storage site information specifying an arraying site for at least one key information item used for deciphering the enciphered data. The apparatus includes a reproducing head device (212) for reading the enciphered data and the key storage site information from the record medium (101), a TOC decoder (219), a CPU (224) and a digital signal processing circuit (220) for decoding the enciphered data using the key information stored on the site designated in accordance with the key storage site information.
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公开(公告)号：DE69326423D1
公开(公告)日：1999-10-21
申请号：DE69326423
申请日：1993-12-22
Applicant: SONY CORP
Inventor： KAWASHIMA ISAO , KURIHARA AKIRA
Abstract: In a database accessing system, access information concerning access to a database system is transferred using call control messages including user-to-user information within a control procedure defining the connection of a call on a signal channel (38). This results in a database accessing method that offers an improved use efficiencies of communication lines, an upgraded operating ratio of a database system, and reduced communication cost.
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Patent Agency Ranking
公开(公告)号：CA1235106A
公开(公告)日：1988-04-12
申请号：CA443174
申请日：1983-12-13
Applicant: SONY CORP
Inventor： YAMAGUCHI TOKUNDO , KIMIZUKA MASANORI , KAWASHIMA ISAO
IPC: G11B23/087 , G11B23/02
Abstract: A tape cassette for holding a magnetic tape which is constituted by an upper half and a lower half which define a cassette case and a tape guide located therein, wherein at least one of the upper half, the lower half and the tape guide is made of material containing ceramics.
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公开(公告)号：DE3347485A1
公开(公告)日：1984-07-05
申请号：DE3347485
申请日：1983-12-29
Applicant: SONY CORP
Inventor： YAMAGUCHI TOKUNDO , KIMIZUKA MASANORI , KAWASHIMA ISAO
IPC: G11B23/087 , G11B23/04 , G11B15/60
Abstract: A tape cassette for holding a magnetic tape which is constituted by an upper half and a lower half which define a cassette case and a tape guide located therein, wherein at least one of the upper half, the lower half and the tape guide is made of material containing ceramics.
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公开(公告)号：DE2517825A1
公开(公告)日：1975-11-06
申请号：DE2517825
申请日：1975-04-22
Applicant: SONY CORP
Inventor： HARA HIDEO , KAWASHIMA ISAO
Abstract: A phonograph record turntable assembly comprises a rotatable turntable having a rubber or other elastically flexible sheet overlying a substantial portion of its upper surface and secured thereto at least along an edge or edges of the sheet for defining at least one sealed interior space which contains a fluid material, preferably in the form of a viscous liquid, so as to provide a cushioned, vibration-damping record supporting surface which conforms to the shape of a warped or otherwise distorted phonograph record placed thereon. In order to avoid the accumulation of the liquid at any one portion of the interior space when the turntable is not horizontally disposed, such interior space may be divided into a plurality of liquid-containing compartments which are isolated from each other, as by partitions therebetween, and/or each interior space or compartment may further contain absorbent material which takes up the viscous liquid. The vibration-damping properties of the turntable assembly may be enhanced by providing solid particles which float in the viscous liquid.
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