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1. (WO2007022038) PROTECTING ELEMENTARY STREAM CONTENT
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2007/022038 International Application No.: PCT/US2006/031556
Publication Date: 22.02.2007 International Filing Date: 10.08.2006
IPC:
H04L 9/36 (2006.01) ,H04N 7/167 (2011.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9
Arrangements for secret or secure communication
36
with means for detecting characters not meant for transmission
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
16
Analogue secrecy systems; Analogue subscription systems
167
Systems rendering the television signal unintelligible and subsequently intelligible
Applicants: MICROSOFT CORPORATION[US/US]; One Microsoft Way Redmond, Washington 98052-6399, US (AllExceptUS)
Inventors: VIRDI, Gurpratap; US
OLIVEIRA, Eduardo, P.; US
KLEMETS, Anders, E.; US
PRITCHETT, Thaddeus, C.; US
Priority Data:
11/202,82812.08.2005US
Title (EN) PROTECTING ELEMENTARY STREAM CONTENT
(FR) PROTECTION D'UN CONTENU A DIFFUSION CONTINUE ELEMENTAIRE
Abstract:
(EN) Protecting elementary stream media content is described. In one aspect, Media Access Units (MAUs) of elementary stream content are identified. Each MAU includes one or more data segments representing a single video or audio frame. Encryption boundaries are selected for each MAU. The encryption boundaries are based on one or more data segments associated with the respective MAU. Portions of each MAU are encrypted based on corresponding encryption boundaries. Each MAU is mapped to a MAU Payload Format. The MAU Payload Format allows a media consumer to process each elementary stream associated with the elementary stream content independent of any different elementary stream. The MAU Payload Format also allows a media consumer to process each MAU in an elementary stream independent of any other MAU.
(FR) L'invention permet de protéger un contenu multimédia à diffusion continue élémentaire. Dans un aspect, on identifie des unités d'accès au support ('Media Access Units' ou MAU) du contenu à diffusion continue élémentaire. Chaque unité MAU comprend un ou plusieurs segments de données représentant une seule trame vidéo ou audio. On choisit des limites de chiffrement pour chaque MAU. Les limites de chiffrement sont basées sur un ou plusieurs segments de données associés à l'unité MAU respective. Des parties de chaque unité MAU sont chiffrées sur la base des limites de chiffrement correspondantes. Chaque unité MAU est mise en correspondance avec un format de charge utile MAU. Le format de charge utile MAU permet à un consommateur multimédia de traiter chaque flux continu élémentaire associé au contenu à diffusion continue élémentaire indépendamment d'un quelconque flux continu élémentaire différent. Le format de charge utile MAU permet également à un consommateur multimédia de traiter chaque unité MAU en un flux continu élémentaire qui est indépendant d'une quelconque autre unité MAU.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)