JPS5775088A - Generation device for composite color video signal - Google Patents

Generation device for composite color video signal

Info

Publication number
JPS5775088A
JPS5775088A JP55151818A JP15181880A JPS5775088A JP S5775088 A JPS5775088 A JP S5775088A JP 55151818 A JP55151818 A JP 55151818A JP 15181880 A JP15181880 A JP 15181880A JP S5775088 A JPS5775088 A JP S5775088A
Authority
JP
Japan
Prior art keywords
signal
color video
composite color
video signal
horizontal synchronizing
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
JP55151818A
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 JP55151818A priority Critical patent/JPS5775088A/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 JPS5775088A publication Critical patent/JPS5775088A/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

Abstract

PURPOSE:To make a stealthy recording ineffective, by adding a disturbing signal to a part, which precedes the trailing edge of a horizontal synchronizing signal and does not appear on a reproduced picture, of the horizontal synchronizing signal of a composite color video signal. CONSTITUTION:The composite color video signal transmitted from a signal source 1 is applied to an adding circuit CS for a disturbing signal. This adding circuit SP consists of a synchronizing separating circuit SEP, monostable multivibrators MM1-MM4, level adjusting equipments 3 and 4, a mixing amplifier MA, etc. On a basis of the time position of the horizontal synchronizing signal of the composite color video signal, a composite color video signal where the disturbing signal having required pulse width and amplitude is added in a prescribed time position is generated.
JP55151818A 1980-10-27 1980-10-29 Generation device for composite color video signal Pending JPS5775088A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55151818A JPS5775088A (en) 1980-10-29 1980-10-29 Generation device for 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
JP55151818A JPS5775088A (en) 1980-10-29 1980-10-29 Generation device for composite color video signal

Publications (1)

Publication Number Publication Date
JPS5775088A true JPS5775088A (en) 1982-05-11

Family

ID=15526978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151818A Pending JPS5775088A (en) 1980-10-27 1980-10-29 Generation device for composite color video signal

Country Status (1)

Country Link
JP (1) JPS5775088A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432781A (en) * 1987-07-29 1989-02-02 Scitec Kk Duplication preventing picture-recorded video tape and duplication preventing picture-recording system for video tape

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6432781A (en) * 1987-07-29 1989-02-02 Scitec Kk Duplication preventing picture-recorded video tape and duplication preventing picture-recording system for video tape

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