WO2004102951A3 - System and method for discouraging copying by recurring quantization loss - Google Patents

System and method for discouraging copying by recurring quantization loss Download PDF

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Publication number
WO2004102951A3
WO2004102951A3 PCT/IB2004/001591 IB2004001591W WO2004102951A3 WO 2004102951 A3 WO2004102951 A3 WO 2004102951A3 IB 2004001591 W IB2004001591 W IB 2004001591W WO 2004102951 A3 WO2004102951 A3 WO 2004102951A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
discouraging
copying
quantization loss
decoded
Prior art date
Application number
PCT/IB2004/001591
Other languages
French (fr)
Other versions
WO2004102951A2 (en
Inventor
Wilhelmus F J Fontijn
Original Assignee
Koninkl Philips Electronics Nv
Philips Corp
Wilhelmus F J Fontijn
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 Koninkl Philips Electronics Nv, Philips Corp, Wilhelmus F J Fontijn filed Critical Koninkl Philips Electronics Nv
Priority to JP2006530658A priority Critical patent/JP2007510319A/en
Priority to EP04730893A priority patent/EP1627385A2/en
Publication of WO2004102951A2 publication Critical patent/WO2004102951A2/en
Publication of WO2004102951A3 publication Critical patent/WO2004102951A3/en

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
    • 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
    • G11B20/10—Digital recording or reproducing
    • 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
    • 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

The present invention alters a signal slightly after the decoding step so that the quantization loss is made recurring while not obvious to a human viewer of the decoded signal. The slightly altered signal, when re-encoded, is degraded enough to be annoying, without the measures being perceived in the first decoded signal. The present invention can be applied to a decoded digital signal if sufficient register space is available or to an analog signal after AD conversion.
PCT/IB2004/001591 2003-05-16 2004-05-03 System and method for discouraging copying by recurring quantization loss WO2004102951A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2006530658A JP2007510319A (en) 2003-05-16 2004-05-03 System and method for copy suppression due to repetitive quantization loss
EP04730893A EP1627385A2 (en) 2003-05-16 2004-05-03 System and method for discouraging copying by recurring quantization loss

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47145103P 2003-05-16 2003-05-16
US60/471,451 2003-05-16

Publications (2)

Publication Number Publication Date
WO2004102951A2 WO2004102951A2 (en) 2004-11-25
WO2004102951A3 true WO2004102951A3 (en) 2005-03-31

Family

ID=33452447

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/001591 WO2004102951A2 (en) 2003-05-16 2004-05-03 System and method for discouraging copying by recurring quantization loss

Country Status (5)

Country Link
EP (1) EP1627385A2 (en)
JP (1) JP2007510319A (en)
KR (1) KR20060010804A (en)
CN (1) CN1791919A (en)
WO (1) WO2004102951A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4622558B2 (en) * 2005-02-07 2011-02-02 ソニー株式会社 Encoding apparatus and method, program, recording medium, and data processing system
KR101465148B1 (en) * 2013-02-28 2014-11-26 연세대학교 산학협력단 Apparatus for encoding/decoding video and method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757910A (en) * 1993-04-06 1998-05-26 Goldstar Co., Ltd. Apparatus for preventing illegal copying of a digital broadcasting signal
EP0915620A1 (en) * 1997-11-07 1999-05-12 Nec Corporation Method and apparatus for preventing unauthorized copy of data recorded on recording medium
EP0948204A2 (en) * 1998-04-02 1999-10-06 Hewlett-Packard Company Method for preventing unauthorised copying of images
EP1187478A2 (en) * 2000-09-01 2002-03-13 Matsushita Electric Industrial Co., Ltd. Audio/visual reproduction apparatus and method with equipment identification code insertion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757910A (en) * 1993-04-06 1998-05-26 Goldstar Co., Ltd. Apparatus for preventing illegal copying of a digital broadcasting signal
EP0915620A1 (en) * 1997-11-07 1999-05-12 Nec Corporation Method and apparatus for preventing unauthorized copy of data recorded on recording medium
EP0948204A2 (en) * 1998-04-02 1999-10-06 Hewlett-Packard Company Method for preventing unauthorised copying of images
US6137952A (en) * 1998-04-02 2000-10-24 Hewlett-Packard Company Apparatus and method for degrading the quality of unauthorized copies of color images and video sequences
EP1187478A2 (en) * 2000-09-01 2002-03-13 Matsushita Electric Industrial Co., Ltd. Audio/visual reproduction apparatus and method with equipment identification code insertion

Also Published As

Publication number Publication date
JP2007510319A (en) 2007-04-19
CN1791919A (en) 2006-06-21
WO2004102951A2 (en) 2004-11-25
KR20060010804A (en) 2006-02-02
EP1627385A2 (en) 2006-02-22

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