BR8907709A - Um processo e um aparelho para evitar gravacao desautorizada em fita de programas de video - Google Patents

Um processo e um aparelho para evitar gravacao desautorizada em fita de programas de video

Info

Publication number
BR8907709A
BR8907709A BR898907709A BR8907709A BR8907709A BR 8907709 A BR8907709 A BR 8907709A BR 898907709 A BR898907709 A BR 898907709A BR 8907709 A BR8907709 A BR 8907709A BR 8907709 A BR8907709 A BR 8907709A
Authority
BR
Brazil
Prior art keywords
tape
memory
stage
signals
recording
Prior art date
Application number
BR898907709A
Other languages
English (en)
Inventor
Arie Marinus Wijnen
Original Assignee
Copyguard Enterprises
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 Copyguard Enterprises filed Critical Copyguard Enterprises
Publication of BR8907709A publication Critical patent/BR8907709A/pt

Links

Classifications

    • 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
    • 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
    • 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
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91385—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video frame number being modulated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • H04N9/89—Time-base error compensation
    • H04N9/896—Time-base error compensation using a digital memory with independent write-in and read-out clock generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Burglar Alarm Systems (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
BR898907709A 1988-10-11 1989-10-10 Um processo e um aparelho para evitar gravacao desautorizada em fita de programas de video BR8907709A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8802494A NL8802494A (nl) 1988-10-11 1988-10-11 Werkwijze en toestel voor het verhinderen van het onrechtmatig op band overnemen van beeldprogramma's.
PCT/EP1989/001227 WO1990004305A1 (en) 1988-10-11 1989-10-10 A method and an apparatus for preventing unauthorised recording on tapes of video programmes

Publications (1)

Publication Number Publication Date
BR8907709A true BR8907709A (pt) 1991-07-30

Family

ID=19853031

Family Applications (1)

Application Number Title Priority Date Filing Date
BR898907709A BR8907709A (pt) 1988-10-11 1989-10-10 Um processo e um aparelho para evitar gravacao desautorizada em fita de programas de video

Country Status (13)

Country Link
EP (1) EP0364047B1 (pt)
JP (1) JPH04506590A (pt)
KR (1) KR900702713A (pt)
AT (1) ATE124588T1 (pt)
AU (1) AU634502B2 (pt)
BR (1) BR8907709A (pt)
CA (1) CA2000423A1 (pt)
DE (1) DE68923241T2 (pt)
ES (1) ES2075035T3 (pt)
GR (1) GR3017593T3 (pt)
IL (1) IL91915A (pt)
NL (1) NL8802494A (pt)
WO (1) WO1990004305A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9000951A (nl) * 1990-04-20 1991-11-18 Copyguard Enterprises Werkwijze en toestel voor het verhinderen van het onrechtmatig op band overnemen van beeldsignalen.
US5589944A (en) * 1993-06-10 1996-12-31 Young; Philip L. Method and apparatus for generating a video signal producing an unviewable display from a videotape recording thereof
US5585929A (en) * 1993-06-10 1996-12-17 Young; Philip L. Method and apparatus for modifying a video signal to inhibit unauthorized videotape recording and subsequent reproduction thereof
US5680454A (en) * 1995-08-04 1997-10-21 Hughes Electronics Method and system for anti-piracy using frame rate dithering
WO2000074366A2 (en) * 1999-05-27 2000-12-07 Digital Electronic Cinema, Inc. Systems and methods for preventing camcorder piracy of motion picture images

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488183A (en) * 1980-10-27 1984-12-11 Victor Company Of Japan, Limited Copy-proof recording medium and device for adding copy-proof interference signal
US4673981A (en) * 1984-03-23 1987-06-16 Massachusetts Institute Of Technology Unrecordable video signals
NL8500515A (nl) * 1985-02-22 1986-09-16 Arie Marinus Wijnen Werkwijze en toestel voor het beveiligen van beeldsignalen.

Also Published As

Publication number Publication date
NL8802494A (nl) 1990-05-01
DE68923241T2 (de) 1996-02-22
IL91915A (en) 1994-11-11
ES2075035T3 (es) 1995-10-01
IL91915A0 (en) 1990-06-10
CA2000423A1 (en) 1990-04-11
DE68923241D1 (de) 1995-08-03
ATE124588T1 (de) 1995-07-15
AU634502B2 (en) 1993-02-25
EP0364047B1 (en) 1995-06-28
JPH04506590A (ja) 1992-11-12
KR900702713A (ko) 1990-12-08
WO1990004305A1 (en) 1990-04-19
GR3017593T3 (en) 1995-12-31
EP0364047A1 (en) 1990-04-18
AU4495289A (en) 1990-05-01

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Legal Events

Date Code Title Description
KD Notifcation of receipt (letter patent)
FG Letter patent granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 10/10/2004