EP 1668907 A1 20060614 - SCRAMBLING, DESCRAMBLING AND A SECURED DISTRIBUTION OF AUDIO-VISUAL SEQUENCES FROM DCT-BASED VIDEO DECODERS
Title (en)
SCRAMBLING, DESCRAMBLING AND A SECURED DISTRIBUTION OF AUDIO-VISUAL SEQUENCES FROM DCT-BASED VIDEO DECODERS
Title (de)
VERWÜRFELUNG, ENTWÜRFELUNG UND GESICHERTE VERTEILUNG VON AUDIOVISUELLEN SEQUENZEN AUS AUF DCT BASIERENDEN VIDEO-DECODERN
Title (fr)
EMBROUILLAGE, DESEMBROUILLAGE ET DISTRIBUTION SECURISEE DE SEQUENCES AUDIOVISUELLES ISSUES DE CODEURS VIDEOS BASES DCT
Publication
Application
Priority
- FR 2004050462 W 20040924
- FR 0350597 A 20030924
Abstract (en)
[origin: FR2860122A1] The method involves analyzing an input video flow (2) to generate a main modified flow (5) having an input video flow format, and complementary information (4) permitting a reconstruction of the input video, before transmitting the input video flow to a client equipment. The main modified flow and complementary information are transmitted separately from a server (6) towards the equipment, during a distribution phase. An independent claim is also included for a video flow creating system for implementing a method of secured distribution of video sequences according to a digital flow format based on a discrete cosine transform (DCT).
IPC 1-7
IPC 8 full level
H04N 7/167 (2011.01); H04N 7/24 (2011.01); H04N 7/26 (2006.01); H04N 7/50 (2006.01)
CPC (source: EP US)
H04N 7/1675 (2013.01 - EP US); H04N 19/467 (2014.11 - EP US); H04N 19/48 (2014.11 - EP US); H04N 19/61 (2014.11 - EP US); H04N 21/2347 (2013.01 - EP US); H04N 21/23476 (2013.01 - EP US); H04N 21/2541 (2013.01 - EP US); H04N 21/4622 (2013.01 - EP US); H04N 21/631 (2013.01 - EP US); H04N 21/835 (2013.01 - EP US)
Citation (search report)
See references of WO 2005032135A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2860122 A1 20050325; FR 2860122 B1 20060303; EP 1668907 A1 20060614; US 2006164544 A1 20060727; WO 2005032135 A1 20050407
DOCDB simple family (application)
FR 0350597 A 20030924; EP 04816237 A 20040924; FR 2004050462 W 20040924; US 38762806 A 20060323