Title:
CONTROLLING METHOD AND DEVICE FOR COPYING
Document Type and Number:
Japanese Patent JP3176030
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a system which is capable of free control of copying for every piece of information offered by recording mediums, communication mediums, etc., of a large capacity on the medium side and practical use of offered information based on reliable and legitimate copying by encoding the information transmitted from a drive to an information transmitting means by the use of key information produced by an information reproducing device(MPEG board) and by copying and reproducing the information which only an information reproducing device having the key information used in the encoding process reads through the drive.
SOLUTION: A MPEG board 6 sends the key information produced by the corresponding board to a DVD(Digital Video Disk) drive 4. The drive 4 produces encoded key information based on the above key information to encode the offered information read by the DVD 2 based on the corresponding key information and to send it to the MPEG board 6. The board 6 decodes the offered information which has been encoded by using the key information produced by the corresponding board.
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Inventors:
Seiichi Nakamura
Application Number:
JP98596A
Publication Date:
June 11, 2001
Filing Date:
January 08, 1996
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G06F12/14; G06F21/10; G06F21/60; G06F21/62; G11B20/00; H04N5/913; G06F1/00; (IPC1-7): G11B19/02; G06F12/14
Domestic Patent References:
| JP7235131A | ||||
| JP6172345A | ||||
| JP64026A | ||||
| JP7221751A |
Attorney, Agent or Firm:
Takehiko Suzue