Title:
VIDEO SIGNAL RECORDING DEVICE AND REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP3217137
Kind Code:
B2
Abstract:
PURPOSE: To cope with the limit of the copying frequency to perform the copy control of high reliability by inserting copy information in the vertical blanking period of a video signal and executing or inhibiting recording in accordance with copy information at the time of recording.
CONSTITUTION: At the time of recording an analog video signal, the video signal inputted from an input terminal 12 is converted to a digital signal and is subjected to processing such as compression by a picture processing circuit 3, and control information or the like is added by a recording/reproducing circuit 2, and this digital signal is recorded on a magnetic tape 14 by a rotary head 1. At this time, a control signal detecting circuit 7 detects copy information in the analog video signal, and a recording/reproducing control circuit 4 decides permission/inhibition of copy in accordance with the presence/absence of copy information. When copy is permitted, the recording/reproducing control circuit 4 adds copy information to the video signal and permits the recording/ reproducing circuit 2 to record the signal on the magnetic tape 14; but when it is inhibited, the circuit 4 inhibits the recording operation itself of the recording/reproducing circuit 2.
Inventors:
Hiroo Okamoto
Masuo Oku
Keiji Noguchi
Takao Arai
Masuo Oku
Keiji Noguchi
Takao Arai
Application Number:
JP20141492A
Publication Date:
October 09, 2001
Filing Date:
July 28, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04N5/76; G06F12/14; G11B20/00; H04N5/91; H04N5/913; H04N5/92; (IPC1-7): H04N5/91; H04N5/92
Domestic Patent References:
| JP482055A |
Attorney, Agent or Firm:
Kenjiro Take (6 outside)