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AU2001243599A1 - A dynamic video copy protection system - Google Patents

A dynamic video copy protection system

Info

Publication number
AU2001243599A1
AU2001243599A1 AU2001243599A AU4359901A AU2001243599A1 AU 2001243599 A1 AU2001243599 A1 AU 2001243599A1 AU 2001243599 A AU2001243599 A AU 2001243599A AU 4359901 A AU4359901 A AU 4359901A AU 2001243599 A1 AU2001243599 A1 AU 2001243599A1
Authority
AU
Australia
Prior art keywords
video signal
copy protection
attribute
scene content
scene
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.)
Abandoned
Application number
AU2001243599A
Inventor
Ronald Quan
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.)
Adeia Media LLC
Original Assignee
Macrovision Corp
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 Macrovision Corp filed Critical Macrovision Corp
Publication of AU2001243599A1 publication Critical patent/AU2001243599A1/en
Abandoned legal-status Critical Current

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
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Optical Filters (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

Copy protection normally included in a video signal to prevent unauthorized copying is dynamically modified, by changing an attribute of the copy protection to be added to or present in the video signal. The copy protection can include any signal that affects playability of an attenuated video signal, for example, by triggering an early or late horizontal or vertical retrace (such as caused by sync narrowing or the checker signals described in U.S. Patent 5,583,936). The attribute change (53) is related to scene content carried by the video signal, so that bright and dark scenes carry different copy protection. The attribute being changed can be, for example a checker's low level that is reduced to below the blanking level when the scene content is darker than normal, and increased to above the blanking level when the scene content is brighter than normal. Alternatively, the attribute being changed can be width of a synchronization pulse normally present in the video signal. The brightness of a scene carried by the video signal can be measured directly (52), or alternatively as the change in attenuation in the synchronization pulse received at the input of a sync separator of a typical VCR or TV set.
AU2001243599A 2000-03-29 2001-03-13 A dynamic video copy protection system Abandoned AU2001243599A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09538107 2000-03-29
US09/538,107 US6826352B1 (en) 2000-03-29 2000-03-29 Dynamic video copy protection system
PCT/US2001/007919 WO2001074068A1 (en) 2000-03-29 2001-03-13 A dynamic video copy protection system

Publications (1)

Publication Number Publication Date
AU2001243599A1 true AU2001243599A1 (en) 2001-10-08

Family

ID=24145522

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001243599A Abandoned AU2001243599A1 (en) 2000-03-29 2001-03-13 A dynamic video copy protection system

Country Status (8)

Country Link
US (1) US6826352B1 (en)
EP (2) EP2053856A3 (en)
JP (1) JP4538179B2 (en)
AT (1) ATE423430T1 (en)
AU (1) AU2001243599A1 (en)
DE (1) DE60137684D1 (en)
TW (1) TW512629B (en)
WO (1) WO2001074068A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7050698B1 (en) * 2000-08-15 2006-05-23 Macrovision Corporation Method and apparatus for synthesizing or modifying a copy protection signal using a lowered signal level portion
CA2475322C (en) * 2002-02-08 2012-08-07 Trust Media Technology S.P.R.L. Method of personalizing and identifying communications
US20030159049A1 (en) * 2002-02-21 2003-08-21 Koninklijke Philips Electronics N.V. Copy-protection by alteration of control signals
CN101251981B (en) * 2002-03-04 2011-03-16 三洋电机株式会社 Organic electroluminescence display device and its application
GB2390247B (en) * 2002-06-28 2006-04-12 Dwight Cavendish Systems Ltd An improved method and apparatus for providing an anti-copy video signal
US7679629B2 (en) * 2003-08-15 2010-03-16 Broadcom Corporation Methods and systems for constraining a video signal
US7489362B2 (en) 2003-03-04 2009-02-10 Broadcom Corporation Television functionality on a chip
US7555125B2 (en) * 2003-08-14 2009-06-30 Broadcom Corporation Systems and methods for generation of time-dependent control signals for video signals
GB0312985D0 (en) 2003-06-05 2003-07-09 Dwight Cavendish Systems Ltd Digital processing disruption systems
US7116374B2 (en) * 2003-08-26 2006-10-03 Koplar Interactive Systems International, L.L.C. Method and system for enhanced modulation of video signals
US7664175B1 (en) * 2004-06-16 2010-02-16 Koplar Interactive Systems International, L.L.C. Mark-based content modulation and detection
GB2419220B (en) 2004-10-13 2009-06-03 Dwight Cavendish Systems Ltd Audio copy protection system
AU2005302561B2 (en) * 2004-10-28 2010-05-13 Rovi Solutions Corporation Content management for high definition television
US7792293B2 (en) * 2005-05-06 2010-09-07 Rovi Solutions Corporation Method and apparatus for modifying a subsequently generated control command in a content control system
JP4428298B2 (en) * 2005-06-14 2010-03-10 セイコーエプソン株式会社 Image display apparatus and control method thereof
US7808557B2 (en) * 2006-06-23 2010-10-05 Rgb Systems, Inc. Method and apparatus for automatic reduction of noise in video transmitted over conductors
US7787057B2 (en) * 2006-08-22 2010-08-31 Rgb Systems, Inc. Method and apparatus for DC restoration using feedback
US20080309816A1 (en) * 2007-06-15 2008-12-18 Macrovision Corporation Television content control system and method with cross-platform capability
US8798133B2 (en) * 2007-11-29 2014-08-05 Koplar Interactive Systems International L.L.C. Dual channel encoding and detection
US20140267679A1 (en) * 2013-03-13 2014-09-18 Leco Corporation Indentation hardness test system having an autolearning shading corrector

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114313A (en) 1976-03-23 1977-09-26 Sony Corp Recorded medium and production method therefor
US5130810A (en) 1983-11-23 1992-07-14 Macrovision Corporation Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings
US4631603A (en) 1985-04-17 1986-12-23 Macrovision Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof
US4695901A (en) 1986-03-04 1987-09-22 Macrovision Method and apparatus for removing pseudo-sync and/or agc pulses from a video signal
CA1288425C (en) 1986-03-12 1991-09-03 Michael V.J. Ramsay Macrolide compounds
US5134496A (en) * 1989-05-26 1992-07-28 Technicolor Videocassette Of Michigan Inc. Bilateral anti-copying device for video systems
JPH03125576U (en) * 1990-03-29 1991-12-18
JP3365569B2 (en) * 1993-03-29 2003-01-14 株式会社東芝 Closed caption receiver
US5583936A (en) * 1993-05-17 1996-12-10 Macrovision Corporation Video copy protection process enhancement to introduce horizontal and vertical picture distortions
ES2149607T3 (en) * 1996-07-19 2000-11-01 Macrovision Corp ADAPTIVE CONTROL METHOD OF THE PRESENCE OF A COPY PROTECTION SIGNAL.
JP3549356B2 (en) * 1997-03-06 2004-08-04 松下電器産業株式会社 Image luminance signal gradation correction device
US6295360B1 (en) * 1997-06-30 2001-09-25 Macrovision Corporation Method and apparatus to defeat composite video signal protection
US6411713B1 (en) * 1997-07-16 2002-06-25 Macrovision Corporation Method of adaptive control of the presence of a copy protection signal

Also Published As

Publication number Publication date
DE60137684D1 (en) 2009-04-02
US6826352B1 (en) 2004-11-30
EP1269749B1 (en) 2009-02-18
WO2001074068A1 (en) 2001-10-04
EP2053856A3 (en) 2009-06-03
JP4538179B2 (en) 2010-09-08
EP1269749A1 (en) 2003-01-02
TW512629B (en) 2002-12-01
ATE423430T1 (en) 2009-03-15
JP2003529295A (en) 2003-09-30
EP2053856A2 (en) 2009-04-29

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