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1. WO2003094510 - PROCEDE ET SYSTEME DE PROTECTION DE DONNEES VIDEO

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Numéro de publication WO/2003/094510
Date de publication 13.11.2003
N° de la demande internationale PCT/CA2003/000623
Date du dépôt international 28.04.2003
CIB
H04N 7/167 2006.1
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
7Systèmes de télévision
16Systèmes à secret analogiques; Systèmes à abonnement analogiques
167Systèmes rendant le signal de télévision inintelligible et ensuite intelligible
CPC
H04N 21/2221
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
21Server components or server architectures
222Secondary servers, e.g. proxy server, cable television Head-end
2221being a cable television head-end
H04N 21/2343
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
234Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
2343involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
H04N 21/2347
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23Processing of content or additional data; Elementary server operations; Server middleware
234Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
2347involving video stream encryption
H04N 21/26606
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
266Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
26606for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
H04N 7/1675
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
167Systems rendering the television signal unintelligible and subsequently intelligible
1675Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
Déposants
  • VIXS SYSTEMS INC. [CA]/[CA] (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NI, NL, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, YU, ZA, ZM, ZW)
  • ENG, Steven [CA]/[CA] (UsOnly)
  • DUCHARME, Paul [CA]/[CA] (UsOnly)
Inventeurs
  • ENG, Steven
  • DUCHARME, Paul
Mandataires
  • SMART & BIGGAR
Données relatives à la priorité
10/137,15102.05.2002US
Langue de publication Anglais (en)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) METHOD AND SYSTEM FOR PROTECTING VIDEO DATA
(FR) PROCEDE ET SYSTEME DE PROTECTION DE DONNEES VIDEO
front page image
Abrégé
(EN) A key protected data stream and an encryption key are received at a gateway device. The gateway device unprotects the data stream based upon the encryption key. The unprotected received data is modified by the gateway to generate a modified data. The modified data is protected based upon the encryption key to generate a key protected modified data. The gateway then transmits the key protected modified data to one or more clients along with the encryption key.
(FR) Un flux de données protégé par un code ainsi qu'un code de cryptage sont reçus par un dispositif passerelle. Le dispositif passerelle déprotège le flux de données à l'aide du code de cryptage. Les données non protégées reçues sont modifiées par la passerelle de manière à produire des données modifiées qui sont protégées à l'aide du code de cryptage pour obtenir des données modifiées protégées par code que la passerelle transmet ensuite à un ou plusieurs clients avec le code de cryptage.
Documents de brevet associés
US20030206636
AU2003221576
Dernières données bibliographiques dont dispose le Bureau international
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