Title:
VIDEO SIGNAL REPRODUCING DEVICE, VIDEO SIGNAL RECORDER, AND VIDEO SIGNAL TRANSMITTER
Document Type and Number:
Japanese Patent JP3443572
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To restrict the number of copying times, and in addition, execute highly reliable copying control, even at the time of copying video signals via analog video signals.
SOLUTION: A video signal reproducing device is provided with an adding circuit 9 which adds copy information during the vertical fly-back period of a reproduced video signal output and outputs reproduced video signals by adding the copy information corresponding to the copy information contained in the video signals to the video signals. A video signal recording device is provided with a detecting circuit 7 which detects the copy information contained in inputted video signals and controls the permission/inhibition of the copying of the video signals based on the detected copy information.
Inventors:
Hiroo Okamoto
Masuo Oku
Keiji Noguchi
Takao Arai
Masuo Oku
Keiji Noguchi
Takao Arai
Application Number:
JP2001180585A
Publication Date:
September 02, 2003
Filing Date:
July 28, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04N5/78; G11B20/02; G11B20/10; H04N5/7826; H04N5/91; H04N5/92; (IPC1-7): H04N5/91; G11B20/10; H04N5/92
Domestic Patent References:
| JP2239468A | ||||
| JP5347744A | ||||
| JP460962A | ||||
| JP670282A | ||||
| JP482055A |
Attorney, Agent or Firm:
Kiyoshi Maruyama (5 others)