NL8900934A - Inrichting voor het opnemen van een audiosignaal. - Google Patents

Inrichting voor het opnemen van een audiosignaal. Download PDF

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Publication number
NL8900934A
NL8900934A NL8900934A NL8900934A NL8900934A NL 8900934 A NL8900934 A NL 8900934A NL 8900934 A NL8900934 A NL 8900934A NL 8900934 A NL8900934 A NL 8900934A NL 8900934 A NL8900934 A NL 8900934A
Authority
NL
Netherlands
Prior art keywords
signal
input
coupled
output
auxiliary
Prior art date
Application number
NL8900934A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL8900934A priority Critical patent/NL8900934A/nl
Priority to US07/495,017 priority patent/US5083224A/en
Priority to EP90200848A priority patent/EP0392612A1/fr
Priority to KR1019900004947A priority patent/KR900017006A/ko
Priority to CN90102070A priority patent/CN1046408A/zh
Priority to JP2094196A priority patent/JPH02292776A/ja
Publication of NL8900934A publication Critical patent/NL8900934A/nl

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
    • 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
    • G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
    • G11B20/00891—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm embedded in audio data
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
NL8900934A 1989-04-14 1989-04-14 Inrichting voor het opnemen van een audiosignaal. NL8900934A (nl)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL8900934A NL8900934A (nl) 1989-04-14 1989-04-14 Inrichting voor het opnemen van een audiosignaal.
US07/495,017 US5083224A (en) 1989-04-14 1990-03-15 Apparatus for recording an audio signal with protection against re-recording thereof, and recording apparatus which indicates the presence of such protection
EP90200848A EP0392612A1 (fr) 1989-04-14 1990-04-09 Dispositif d'enregistrement d'un signal audio
KR1019900004947A KR900017006A (ko) 1989-04-14 1990-04-11 오디오 신호 기록장치 및 기록 캐리어
CN90102070A CN1046408A (zh) 1989-04-14 1990-04-11 音频信号记录装置
JP2094196A JPH02292776A (ja) 1989-04-14 1990-04-11 音声信号記録装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8900934A NL8900934A (nl) 1989-04-14 1989-04-14 Inrichting voor het opnemen van een audiosignaal.
NL8900934 1989-04-14

Publications (1)

Publication Number Publication Date
NL8900934A true NL8900934A (nl) 1990-11-01

Family

ID=19854474

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8900934A NL8900934A (nl) 1989-04-14 1989-04-14 Inrichting voor het opnemen van een audiosignaal.

Country Status (6)

Country Link
US (1) US5083224A (fr)
EP (1) EP0392612A1 (fr)
JP (1) JPH02292776A (fr)
KR (1) KR900017006A (fr)
CN (1) CN1046408A (fr)
NL (1) NL8900934A (fr)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363250A (en) * 1991-07-31 1994-11-08 U.S. Philips Corporation Prerecorded record carrier
DE4135419A1 (de) * 1991-10-26 1993-04-29 Thomson Brandt Gmbh Speichereinrichtung fuer eine magnetbandkassette
US6301369B2 (en) 1992-07-31 2001-10-09 Digimarc Corporation Image marking to permit later identification
US5721788A (en) * 1992-07-31 1998-02-24 Corbis Corporation Method and system for digital image signatures
US5315448A (en) * 1993-03-18 1994-05-24 Macrovision Corporation Copy protection for hybrid digital video tape recording and unprotected source material
US7171016B1 (en) 1993-11-18 2007-01-30 Digimarc Corporation Method for monitoring internet dissemination of image, video and/or audio files
US5768426A (en) * 1993-11-18 1998-06-16 Digimarc Corporation Graphics processing system employing embedded code signals
US6614914B1 (en) 1995-05-08 2003-09-02 Digimarc Corporation Watermark embedder and reader
US6516079B1 (en) 2000-02-14 2003-02-04 Digimarc Corporation Digital watermark screening and detecting strategies
US6983051B1 (en) 1993-11-18 2006-01-03 Digimarc Corporation Methods for audio watermarking and decoding
US6944298B1 (en) * 1993-11-18 2005-09-13 Digimare Corporation Steganographic encoding and decoding of auxiliary codes in media signals
US6611607B1 (en) 1993-11-18 2003-08-26 Digimarc Corporation Integrating digital watermarks in multimedia content
US6408082B1 (en) 1996-04-25 2002-06-18 Digimarc Corporation Watermark detection using a fourier mellin transform
US5748763A (en) * 1993-11-18 1998-05-05 Digimarc Corporation Image steganography system featuring perceptually adaptive and globally scalable signal embedding
US6757406B2 (en) 1993-11-18 2004-06-29 Digimarc Corporation Steganographic image processing
US6449377B1 (en) 1995-05-08 2002-09-10 Digimarc Corporation Methods and systems for watermark processing of line art images
US6424725B1 (en) 1996-05-16 2002-07-23 Digimarc Corporation Determining transformations of media signals with embedded code signals
US6122403A (en) 1995-07-27 2000-09-19 Digimarc Corporation Computer system linked by using information in data objects
US6560349B1 (en) 1994-10-21 2003-05-06 Digimarc Corporation Audio monitoring using steganographic information
US7486799B2 (en) * 1995-05-08 2009-02-03 Digimarc Corporation Methods for monitoring audio and images on the internet
US6411725B1 (en) * 1995-07-27 2002-06-25 Digimarc Corporation Watermark enabled video objects
US5896255A (en) * 1995-10-02 1999-04-20 Aris Mardirossian, Inc. Magnetic disc cartridge and corresponding system/method for limiting coping of software
US5636096A (en) * 1995-10-02 1997-06-03 Aris Mardirossian, Inc. Magnetic disc cartridge and corresponding system/method for limiting copying of software
US6011765A (en) * 1996-04-12 2000-01-04 Sony Corporation Recording medium having copying protection signals recorded in superposition on main signals
US6381341B1 (en) 1996-05-16 2002-04-30 Digimarc Corporation Watermark encoding method exploiting biases inherent in original signal
NL1005310C2 (nl) * 1997-02-18 1998-08-20 Commanditaire Vennootschap C V Werkwijze voor het tegen kopiëren beveiligen van een audiosignaal.
ES2155230T3 (es) * 1997-08-28 2001-05-01 Sony Dadc Austria Ag Sistema para gestionar el copiado de un disco optico.
JP3248679B2 (ja) * 1997-11-21 2002-01-21 日本ビクター株式会社 ディスク再生装置
EP0955634A1 (fr) 1998-05-04 1999-11-10 Spiro J. Pandelidis High Tech Applications Système anti-copie pour signaux audio
JPH11328849A (ja) * 1998-05-15 1999-11-30 Sony Corp データ記録装置
US6633654B2 (en) * 2000-06-19 2003-10-14 Digimarc Corporation Perceptual modeling of media signals based on local contrast and directional edges
US6696989B2 (en) 2001-09-17 2004-02-24 Matsushita Electric Industrial Co., Ltd. Data-update apparatus, reproduction apparatus, data-addition apparatus, data-detection apparatus and data-removal apparatus
US7177430B2 (en) * 2001-10-31 2007-02-13 Portalplayer, Inc. Digital entroping for digital audio reproductions
GB2390247B (en) 2002-06-28 2006-04-12 Dwight Cavendish Systems Ltd An improved method and apparatus for providing an anti-copy video signal
GB0312985D0 (en) 2003-06-05 2003-07-09 Dwight Cavendish Systems Ltd Digital processing disruption systems
US20060271490A1 (en) * 2003-08-18 2006-11-30 Kalker Antonius Adrianus C M Method of counteracting copying of digital information
US20050271364A1 (en) * 2004-03-26 2005-12-08 Collar Bradley T Method of foiling copy protection for DVDs
GB2419220B (en) 2004-10-13 2009-06-03 Dwight Cavendish Systems Ltd Audio copy protection system
GB0513051D0 (en) 2005-06-27 2005-08-03 Dwight Cavendish Systems Ltd Copy protection method and apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040099A (en) * 1975-07-30 1977-08-02 Cook Laboratories, Inc. Method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications
FR2459532B1 (fr) * 1979-06-18 1987-07-31 Quadrivium Tech Avancees Procede pour associer une information auxiliaire a une information principale enregistree et application au controle de la reproduction d'information enregistree
US4404603A (en) * 1980-05-27 1983-09-13 Warren Eugene D Apparatus and method for inspecting magnetic tape recorded material for alterations
GB2104701B (en) * 1981-08-06 1985-06-05 James Bertram King Method and apparatus for preventing unauthorised recording of source material (eg, a gramophone recording)
NL8103834A (nl) * 1981-08-17 1983-03-16 Philips Nv Werkwijze voor het schrijven respektievelijk weergeven van stereofonische informatie in een magnetische registratiedrager, een inrichting voor het uitvoeren van de werkwijze, een magnetische registratiedrager en een versterkerschakeling te gebruiken in een inrichting voor het uitvoeren van de werkwijze.
FR2515403A1 (fr) * 1981-10-28 1983-04-29 Quadrivium Inf Procede d'identification d'un enregistrement sonore et installation de duplication mettant en oeuvre le procede
US4802212A (en) * 1987-06-01 1989-01-31 Samuel R. Freeman Method and device for preventing tape piracy
EP0298691B1 (fr) * 1987-07-08 1994-10-05 Matsushita Electric Industrial Co., Ltd. Méthode et appareil de protection du signal de copie
GB8809347D0 (en) * 1988-04-20 1988-05-25 Emi Plc Thorn Apparatus for marking recorded signal

Also Published As

Publication number Publication date
US5083224A (en) 1992-01-21
CN1046408A (zh) 1990-10-24
KR900017006A (ko) 1990-11-15
EP0392612A1 (fr) 1990-10-17
JPH02292776A (ja) 1990-12-04

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