EP 1486071 A4 20090930 - ELEMENTARY STREAM PARTIAL ENCRYPTION
Title (en)
ELEMENTARY STREAM PARTIAL ENCRYPTION
Title (de)
ELEMENTARSTROM-PARTIALVERSCHLÜSSELUNG
Title (fr)
CRYPTAGE PARTIEL DE TRAINS DE DONNEES ELEMENTAIRES
Publication
Application
Priority
- CA 2405865 A 20021001
- US 0240051 W 20021213
- US 3791402 A 20020102
Abstract (en)
[origin: WO03061173A2] An encryption arrangement for multiple encryption of television programs. A system according toembodiments of the present invention multiple encrypts only a portion of the data required for full presentation of a television program to permit coexistence of multiple conditional access encryption systems associated with multiple manufacturer's set-top boxes within a single system. In one embodiment, only audio data are encrypted leaving video in the clear. By only encrypting a portion of the program, dramatically less bandwidth is consumed than the alternative of multiple encryption of all program data, thus permitting a larger number of programs to be carried over the samebandwidth while permitting coexistence of multiple conditional access systems in a single cable television system.
IPC 1-7
IPC 8 full level
H04L 9/18 (2006.01); H04N 7/167 (2011.01); H04N 21/2347 (2011.01); H04N 21/2362 (2011.01); H04N 21/266 (2011.01); H04N 21/434 (2011.01); H04N 21/4405 (2011.01); H04N 21/4623 (2011.01); H04N 21/835 (2011.01)
CPC (source: EP KR)
H04N 7/10 (2013.01 - KR); H04N 7/1675 (2013.01 - EP); H04N 21/2347 (2013.01 - KR); H04N 21/23476 (2013.01 - EP); H04N 21/2362 (2013.01 - EP); H04N 21/26606 (2013.01 - EP); H04N 21/4345 (2013.01 - EP); H04N 21/44055 (2013.01 - EP); H04N 21/4623 (2013.01 - EP); H04N 21/835 (2013.01 - EP)
Citation (search report)
- [XY] US 5796829 A 19980818 - NEWBY CHARLES F [US], et al
- [Y] WO 9808341 A1 19980226 - FRANCE TELECOM [FR], et al
- [Y] US 5420866 A 19950530 - WASILEWSKI ANTHONY J [US]
- [A] EP 0696141 A2 19960207 - NOKIA TECHNOLOGY GMBH [DE]
- [A] WO 9528058 A1 19951019 - FRANCE TELECOM [FR], et al
- [A] CUTTS D J: "DVB CONDITIONAL ACCESS", ELECTRONICS AND COMMUNICATION ENGINEERING JOURNAL, INSTITUTION OF ELECTRICAL ENGINEERS, LONDON, GB, vol. 9, no. 1, 1 February 1997 (1997-02-01), pages 21 - 27, XP000722905, ISSN: 0954-0695
- [A] "FUNCTIONAL MODEL OF A CONDITIONAL ACCESS SYSTEM", EBU REVIEW- TECHNICAL, EUROPEAN BROADCASTING UNION. BRUSSELS, BE, no. 266, 21 December 1995 (1995-12-21), pages 64 - 77, XP000559450, ISSN: 0251-0936
- See references of WO 03061173A2
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 03061173 A2 20030724; WO 03061173 A3 20040923; AU 2002357846 A1 20030730; AU 2002357846 A8 20030730; CN 1633809 A 20050629; CN 1633809 B 20100421; EP 1486071 A2 20041215; EP 1486071 A4 20090930; JP 2005515694 A 20050526; JP 4446743 B2 20100407; KR 101004196 B1 20101224; KR 20040068994 A 20040802; MX PA04006400 A 20041004
DOCDB simple family (application)
US 0240051 W 20021213; AU 2002357846 A 20021213; CN 02828452 A 20021213; EP 02792388 A 20021213; JP 2003561138 A 20021213; KR 20047010464 A 20021213; MX PA04006400 A 20021213