GB2267598B - Improvements in or relating to detecting copied video recordings - Google Patents

Improvements in or relating to detecting copied video recordings

Info

Publication number
GB2267598B
GB2267598B GB9211526A GB9211526A GB2267598B GB 2267598 B GB2267598 B GB 2267598B GB 9211526 A GB9211526 A GB 9211526A GB 9211526 A GB9211526 A GB 9211526A GB 2267598 B GB2267598 B GB 2267598B
Authority
GB
United Kingdom
Prior art keywords
relating
video recordings
copied video
detecting copied
detecting
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.)
Expired - Lifetime
Application number
GB9211526A
Other versions
GB2267598A (en
GB9211526D0 (en
Inventor
Jeremy Jonathan Corcoran
Alistair John Knox
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.)
Rovi Europe Ltd
Original Assignee
Macrovision UK Ltd
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 UK Ltd filed Critical Macrovision UK Ltd
Priority to GB9211526A priority Critical patent/GB2267598B/en
Publication of GB9211526D0 publication Critical patent/GB9211526D0/en
Publication of GB2267598A publication Critical patent/GB2267598A/en
Application granted granted Critical
Publication of GB2267598B publication Critical patent/GB2267598B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B20/00746—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 can be expressed as a specific number
    • G11B20/00753—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 can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
    • G11B20/00768—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 can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/06—Diagnosis, testing or measuring for television systems or their details for recorders
    • 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
    • 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
    • H04N2005/91328—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 copy management signal, e.g. a copy generation management signal [CGMS]
    • 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
GB9211526A 1992-06-01 1992-06-01 Improvements in or relating to detecting copied video recordings Expired - Lifetime GB2267598B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9211526A GB2267598B (en) 1992-06-01 1992-06-01 Improvements in or relating to detecting copied video recordings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9211526A GB2267598B (en) 1992-06-01 1992-06-01 Improvements in or relating to detecting copied video recordings

Publications (3)

Publication Number Publication Date
GB9211526D0 GB9211526D0 (en) 1992-07-15
GB2267598A GB2267598A (en) 1993-12-08
GB2267598B true GB2267598B (en) 1995-09-13

Family

ID=10716304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9211526A Expired - Lifetime GB2267598B (en) 1992-06-01 1992-06-01 Improvements in or relating to detecting copied video recordings

Country Status (1)

Country Link
GB (1) GB2267598B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7167574B2 (en) 2002-03-14 2007-01-23 Seiko Epson Corporation Method and apparatus for content-based image copy detection
US7532804B2 (en) 2003-06-23 2009-05-12 Seiko Epson Corporation Method and apparatus for video copy detection
US7486827B2 (en) 2005-01-21 2009-02-03 Seiko Epson Corporation Efficient and robust algorithm for video sequence matching

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1547666A (en) * 1975-04-05 1979-06-27 Nippon Electric Co Video signal coding system
US4344084A (en) * 1981-02-04 1982-08-10 Zenith Radio Corporation VIR Correction system
US4455634A (en) * 1982-01-12 1984-06-19 Discovision Associates Audio/video quality monitoring system
EP0189548A1 (en) * 1984-11-30 1986-08-06 VPS Video-Programm Service GmbH Procedure for the copy-protected magnetic recording of video signals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1547666A (en) * 1975-04-05 1979-06-27 Nippon Electric Co Video signal coding system
US4344084A (en) * 1981-02-04 1982-08-10 Zenith Radio Corporation VIR Correction system
US4455634A (en) * 1982-01-12 1984-06-19 Discovision Associates Audio/video quality monitoring system
EP0189548A1 (en) * 1984-11-30 1986-08-06 VPS Video-Programm Service GmbH Procedure for the copy-protected magnetic recording of video signals

Also Published As

Publication number Publication date
GB2267598A (en) 1993-12-08
GB9211526D0 (en) 1992-07-15

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20120531