JPS5773587A - Recording medium having recorded composite color video signal - Google Patents

Recording medium having recorded composite color video signal

Info

Publication number
JPS5773587A
JPS5773587A JP55150437A JP15043780A JPS5773587A JP S5773587 A JPS5773587 A JP S5773587A JP 55150437 A JP55150437 A JP 55150437A JP 15043780 A JP15043780 A JP 15043780A JP S5773587 A JPS5773587 A JP S5773587A
Authority
JP
Japan
Prior art keywords
signal
horizontal synchronizing
composite color
synchronizing signal
video signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55150437A
Other languages
Japanese (ja)
Inventor
Toshio Kaneshiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP55150437A priority Critical patent/JPS5773587A/en
Priority to US06/313,691 priority patent/US4488183A/en
Priority to GB8132052A priority patent/GB2086641B/en
Priority to DE3142593A priority patent/DE3142593C2/en
Publication of JPS5773587A publication Critical patent/JPS5773587A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00818—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals
    • G11B20/00826—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals wherein a spoiler signal is added to degrade the signal quality
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91314—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To invalidate record tapping through a home video tape recorder (VTR) by adding a disturbing signal with sufficiently nallow pulse width to a position that exists in advance of the trailing edge of a horizontal synchronizing signal included in a composite color vidow signal and is not displayed on a picture. CONSTITUTION:A disturbing signal PSI whose pulse width is extremely narrower than that of a horizontal synchronizing signal Ph included in a composite color video signal and a crest value is about 1-1.5 times that of the horizontal synchronizing signal Ph is added to the time position delayed by a few period from the time position of the leading edge (a) of the horizontal synchronizing signal Ph in a composite color video signal, or a pulse PS3 or PS4 with narrow width is added to a video signal are which is not displayed on a front porch or a reproduced picture at the time position existing in advance of the leading edge (a) of the horizontal synchronizing signal Ph. If these signals are reproduced after recording them by a home VTR, a monitor receiver reproduces only reproduced pictures different from regular colors or monochromatic pictures.
JP55150437A 1980-10-27 1980-10-27 Recording medium having recorded composite color video signal Pending JPS5773587A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55150437A JPS5773587A (en) 1980-10-27 1980-10-27 Recording medium having recorded composite color video signal
US06/313,691 US4488183A (en) 1980-10-27 1981-10-21 Copy-proof recording medium and device for adding copy-proof interference signal
GB8132052A GB2086641B (en) 1980-10-27 1981-10-23 Copy-proof recording medium and device for adding copy-proof interference signal
DE3142593A DE3142593C2 (en) 1980-10-27 1981-10-27 Copy-protected recording medium and circuit arrangement for inserting a copy-protection interference signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150437A JPS5773587A (en) 1980-10-27 1980-10-27 Recording medium having recorded composite color video signal

Publications (1)

Publication Number Publication Date
JPS5773587A true JPS5773587A (en) 1982-05-08

Family

ID=15496903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150437A Pending JPS5773587A (en) 1980-10-27 1980-10-27 Recording medium having recorded composite color video signal

Country Status (1)

Country Link
JP (1) JPS5773587A (en)

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