Title:
COPY PROTECT SYSTEM
Document Type and Number:
Japanese Patent JP3435277
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To limit free copying by the user of information depending on the will of the supply source of the information such as a writer.
SOLUTION: The possibility of copying is arbitrarily shown while using a copy write flag and an original copy flag determined by an ISO/IEC13818. At a television receiver with which the prescribed information of images or the like is reproduced and outputted from the digital signal in the signal format determined by the ISO/IEC13818, based on the copy write flag and the original copy flag, a copy flag state detecting means 3a discriminates whether the digital signal having these flags can be copied or not. When it is discriminated that copy is enabled, a switch 6 is turned on so that a normal signal for reproducing this prescribed information can be outputted as a signal for recording. Besides, when it is discriminated that copying is disabled, the switch 6 is turned off so that the signal for recording is turned into non-signal state.
Inventors:
Masahiro Yamada
Noriya Sakamoto
Atsushi Hirota
Noriya Sakamoto
Atsushi Hirota
Application Number:
JP1440696A
Publication Date:
August 11, 2003
Filing Date:
January 30, 1996
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G06F21/10; G11B20/10; G11B20/12; H04N5/44; H04N5/91; (IPC1-7): H04N5/91; G11B20/10; H04N5/44
Domestic Patent References:
| JP7230668A | ||||
| JP530466A | ||||
| JP7235131A | ||||
| JP537898A | ||||
| JP8265723A | ||||
| JP654289A | ||||
| JP5347744A | ||||
| JP6124539A |
Attorney, Agent or Firm:
Takehiko Suzue