CA2030313A1 - Encoding an optical video disc to inhibit video tape recording - Google Patents

Encoding an optical video disc to inhibit video tape recording

Info

Publication number
CA2030313A1
CA2030313A1 CA2030313A CA2030313A CA2030313A1 CA 2030313 A1 CA2030313 A1 CA 2030313A1 CA 2030313 A CA2030313 A CA 2030313A CA 2030313 A CA2030313 A CA 2030313A CA 2030313 A1 CA2030313 A1 CA 2030313A1
Authority
CA
Canada
Prior art keywords
encoding
video
inhibit
video signal
video disc
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.)
Granted
Application number
CA2030313A
Other languages
French (fr)
Other versions
CA2030313C (en
Inventor
Bernard J. Lechner
Eugene Leonard
Graham S. Stubbs
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.)
LEGHORN TELEPUBLISHING Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2030313A1 publication Critical patent/CA2030313A1/en
Application granted granted Critical
Publication of CA2030313C publication Critical patent/CA2030313C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91378—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video line number being modulated
    • 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

Abstract

A system and method for encoding an optional video disc to inhibit unauthorized recording of played back signals by conventional videotape recorders is provided. A source program is mounted on a video signal generating means. The video signal is modified by increasing and decreasing time durations from a standard horizontal line duration of pre-established maximums and minimums. The modified video signal is recorded on a previously blank optical video disc.
CA002030313A 1989-12-18 1990-11-20 Encoding an optical video disc to inhibit video tape recording Expired - Fee Related CA2030313C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/452,599 US5003590A (en) 1989-12-18 1989-12-18 Encoding an optical video disc to inhibit video tape recording
US452,599 1989-12-18

Publications (2)

Publication Number Publication Date
CA2030313A1 true CA2030313A1 (en) 1991-06-19
CA2030313C CA2030313C (en) 1996-03-05

Family

ID=23797123

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002030313A Expired - Fee Related CA2030313C (en) 1989-12-18 1990-11-20 Encoding an optical video disc to inhibit video tape recording

Country Status (4)

Country Link
US (1) US5003590A (en)
EP (1) EP0506824A4 (en)
CA (1) CA2030313C (en)
WO (1) WO1991009500A1 (en)

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US5182771A (en) * 1991-03-29 1993-01-26 Scientific Atlanta, Inc. Anti-taping method and apparatus for a multiplexed analog component television system
JPH05122701A (en) * 1991-10-25 1993-05-18 Canon Inc Charging information processing unit
US5721788A (en) * 1992-07-31 1998-02-24 Corbis Corporation Method and system for digital image signatures
US5832119C1 (en) * 1993-11-18 2002-03-05 Digimarc Corp Methods for controlling systems using control signals embedded in empirical data
US5748763A (en) 1993-11-18 1998-05-05 Digimarc Corporation Image steganography system featuring perceptually adaptive and globally scalable signal embedding
US5768426A (en) * 1993-11-18 1998-06-16 Digimarc Corporation Graphics processing system employing embedded code signals
US6983051B1 (en) * 1993-11-18 2006-01-03 Digimarc Corporation Methods for audio watermarking and decoding
US6580819B1 (en) 1993-11-18 2003-06-17 Digimarc Corporation Methods of producing security documents having digitally encoded data and documents employing same
US6449377B1 (en) * 1995-05-08 2002-09-10 Digimarc Corporation Methods and systems for watermark processing of line art images
US5822436A (en) 1996-04-25 1998-10-13 Digimarc Corporation Photographic products and methods employing embedded information
US5841886A (en) * 1993-11-18 1998-11-24 Digimarc Corporation Security system for photographic identification
CA2174413C (en) * 1993-11-18 2009-06-09 Geoffrey B. Rhoads Steganographic methods and apparatuses
US6522770B1 (en) 1999-05-19 2003-02-18 Digimarc Corporation Management of documents and other objects using optical devices
US5659613A (en) * 1994-06-29 1997-08-19 Macrovision Corporation Method and apparatus for copy protection for various recording media using a video finger print
US6560349B1 (en) 1994-10-21 2003-05-06 Digimarc Corporation Audio monitoring using steganographic information
KR0152788B1 (en) 1994-11-26 1998-10-15 이헌조 Copy protecting method and apparatus of digital image system
KR0136458B1 (en) 1994-12-08 1998-05-15 구자홍 Copy protection apparatus of digital magnetic recording and reproducing system
US20060206397A1 (en) * 1995-02-13 2006-09-14 Intertrust Technologies Corp. Cryptographic methods, apparatus and systems for storage media electronic right management in closed and connected appliances
CN100452071C (en) * 1995-02-13 2009-01-14 英特特拉斯特技术公司 Systems and methods for secure transaction management and electronic rights protection
US5737417A (en) * 1995-04-24 1998-04-07 Technicolor Videocassette, Inc. Videotape anti-copying encryption scheme
US6721440B2 (en) 1995-05-08 2004-04-13 Digimarc Corporation Low visibility watermarks using an out-of-phase color
US6744906B2 (en) 1995-05-08 2004-06-01 Digimarc Corporation Methods and systems using multiple watermarks
US6965682B1 (en) 1999-05-19 2005-11-15 Digimarc Corp Data transmission by watermark proxy
US6829368B2 (en) 2000-01-26 2004-12-07 Digimarc Corporation Establishing and interacting with on-line media collections using identifiers in media signals
US6788800B1 (en) 2000-07-25 2004-09-07 Digimarc Corporation Authenticating objects using embedded data
US6577746B1 (en) * 1999-12-28 2003-06-10 Digimarc Corporation Watermark-based object linking and embedding
US7054463B2 (en) 1998-01-20 2006-05-30 Digimarc Corporation Data encoding using frail watermarks
IL131545A0 (en) * 1999-08-23 2001-01-28 Ttr Technologies Ltd Copy-protected digital audio compact disc and method and system for producing same
US6625297B1 (en) 2000-02-10 2003-09-23 Digimarc Corporation Self-orienting watermarks
US6315866B1 (en) * 2000-02-29 2001-11-13 Nalco Chemical Company Method of increasing the dry strength of paper products using cationic dispersion polymers
US6804377B2 (en) 2000-04-19 2004-10-12 Digimarc Corporation Detecting information hidden out-of-phase in color channels

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963865A (en) * 1975-06-04 1976-06-15 Trans-American Video, Inc. Anti-piracy method and system
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
US4550341A (en) * 1982-08-03 1985-10-29 Pioneer Electronic Corporation Unauthorized observation preventing device for CATV system
US4642688A (en) * 1983-06-24 1987-02-10 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals
US4594609A (en) * 1983-06-30 1986-06-10 Viewstar Inc. Scrambling system for television video signal
CA1213972A (en) * 1983-07-13 1986-11-12 Takashi Okada Apparatus for scrambling a television signal
US4673981A (en) * 1984-03-23 1987-06-16 Massachusetts Institute Of Technology Unrecordable video signals
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
GB2187324B (en) * 1986-02-28 1989-11-08 Sony Corp Tape recorder synchronizer apparatus
US4695901A (en) * 1986-03-04 1987-09-22 Macrovision Method and apparatus for removing pseudo-sync and/or agc pulses from a video signal
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
US4866543A (en) * 1987-09-11 1989-09-12 Electro Sound, Inc. Multiple slave video tape reproduction system
US4914694A (en) * 1988-04-11 1990-04-03 Eidak Corporation Modifying a television signal to inhibit recording/reproduction
US4916736A (en) * 1988-06-07 1990-04-10 Macrovision Corporation Method and apparatus for encrypting and decrypting time domain signals

Also Published As

Publication number Publication date
CA2030313C (en) 1996-03-05
US5003590A (en) 1991-03-26
EP0506824A1 (en) 1992-10-07
EP0506824A4 (en) 1993-05-12
WO1991009500A1 (en) 1991-06-27

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed