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1. WO2002067255 - PROCEDE PERMETTANT D"INCORPORER UN SIGNAL SECONDAIRE AU TRAIN BINAIRE D"UN SIGNAL PRIMAIRE

Numéro de publication WO/2002/067255
Date de publication 29.08.2002
N° de la demande internationale PCT/IB2002/000426
Date du dépôt international 13.02.2002
CIB
G11B 20/00 2006.1
GPHYSIQUE
11ENREGISTREMENT DE L'INFORMATION
BENREGISTREMENT DE L'INFORMATION BASÉ SUR UN MOUVEMENT RELATIF ENTRE LE SUPPORT D'ENREGISTREMENT ET LE TRANSDUCTEUR
20Traitement du signal, non spécifique du procédé d'enregistrement ou de reproduction; Circuits correspondants
H04N 5/913 2006.1
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
5Détails des systèmes de télévision
76Enregistrement du signal de télévision
91Traitement du signal de télévision pour l'enregistrement
913pour la transposition
CPC
G10L 19/018
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
018Audio watermarking, i.e. embedding inaudible data in the audio signal
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 20/00586
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
00572involving measures which change the format of the recording medium
00586said format change concerning the physical format of the recording medium
G11B 20/10
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
10Digital recording or reproducing
H04N 2005/91342
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
76Television signal recording
91Television signal processing therefor
913for scrambling ; ; for copy protection
91307by adding a copy protection signal to the video signal
91342the copy protection signal being an authentication signal
H04N 21/4408
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
4408involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
Déposants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL]
Inventeurs
  • BENTVELSEN, Petrus, H., C.
Mandataires
  • DEGUELLE, Wilhelmus, H., G.
Données relatives à la priorité
01200575.719.02.2001EP
Langue de publication Anglais (en)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) METHOD OF EMBEDDING A SECONDARY SIGNAL IN THE BITSTREAM OF A PRIMARY SIGNAL
(FR) PROCEDE PERMETTANT D"INCORPORER UN SIGNAL SECONDAIRE AU TRAIN BINAIRE D"UN SIGNAL PRIMAIRE
Abrégé
(EN) The invention relates to a method of embedding a secondary signal of a secondary channel in the bitstream of a primary signal of a primary channel. For copy protection and digital rights management for recordable or rewritable data carriers it is required that a key can be written and rewritten in a hidden side channel, i. e. in the secondary channel. Therefore it is proposed according to the invention that the bitstream of the primary signal is distorted before outputting the bitstream of the primary signal such that the secondary signal is represented by a predetermined distortion. The invention relates further to a method for detecting a secondary signal embedded in the bitstream of a primary signal, to corresponding apparatuses and to a corresponding data carrier.
(FR) La présente invention concerne un procédé permettant d"incorporer un signal secondaire d"un canal secondaire au train binaire d"un signal primaire d"un canal primaire. Pour permettre la gestion de la protection contre la copie et des droits numériques pour des supports de données enregistrables ou réinscriptibles, une clé peut être inscrite ou réinscrite dans un canal côté caché, c"est-à-dire dans le canal secondaire. A cet effet, il est proposé selon l"invention de déformer le train binaire du signal primaire avant de diffuser le train binaire du premier signal de sorte que le signal secondaire est représenté par une déformation prédéterminée. Cette invention concerne également un procédé servant à détecter un signal secondaire incorporé au train binaire d"un signal primaire, des dispositifs correspondants et un support de données correspondant.
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