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1. WO2003040856 - METHOD AND APPARATUS TO PREVENT THE UNAUTHORIZED COPYING OF DIGITAL INFORMATION

Publication Number WO/2003/040856
Publication Date 15.05.2003
International Application No. PCT/IB2002/004462
International Filing Date 24.10.2002
IPC
G11B 20/00 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
CPC
G11B 20/00086
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
G11B 20/00166
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
00166involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
G11B 20/00884
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
00884involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL]
Inventors
  • WEIMERSKIRCH, Andre
Agents
  • GROENENDAAL, Antonius, W., M.
Priority Data
09/992,92405.11.2001US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS TO PREVENT THE UNAUTHORIZED COPYING OF DIGITAL INFORMATION
(FR) PROCEDE ET APPAREIL POUR EMPECHER LA REPRODUCTION NON AUTORISEE D'INFORMATIONS NUMERIQUES
Abstract
(EN)
A method for authorizing the rendering of a digital recording. A first section and a last section of a track is first identified. A watermark is then decoded from the first and last sections of the track. It is then determined if at least one reserved bit is marked in the watermark in each of the first and last sections of the track. If so, it is determined if the sequence IDs of sections interposed between the first and last sections of the track are in sequential order. If both conditions are met, the rendering is authorized.
(FR)
L'invention concerne un procédé permettant d'autoriser le rendu d'un enregistrement numérique. En premier lieu, on identifie une première section et une dernière section d'une piste. Un filigrane est ensuite décodé à partir de la première et de la seconde sections de la piste. On détermine ensuite si au moins un bit réservé est marqué dans le filigrane dans chacune des première et seconde sections de la piste. Dans l'affirmative, on détermine si les identifications séquentielles des sections s'interposant entre les première et seconde sections de la piste sont dans un ordre séquentiel. Si les deux conditions sont satisfaites, le rendu est alors autorisé.
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