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1. WO2013026041 - SECURING A HDCP LINK FROM GRAPHIC PROCESSOR GPU TO VIDEO DISPLAY

Publication Number WO/2013/026041
Publication Date 21.02.2013
International Application No. PCT/US2012/051482
International Filing Date 17.08.2012
IPC
G11B 20/00 2006.01
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
H04N 21/8355 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand
80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
83Generation or processing of protective or descriptive data associated with content; Content structuring
835Generation of protective data, e.g. certificates
8355involving usage data, e.g. number of copies or viewings allowed
CPC
G06F 21/10
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
10Protecting distributed programs or content, e.g. vending or licensing of copyrighted material
G06F 21/84
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
70Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
82Protecting input, output or interconnection devices
84output devices, e.g. displays or monitors
G06T 1/0021
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
1General purpose image data processing
0021Image watermarking
G06T 2201/0053
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2201General purpose image data processing
005Image watermarking
0053Embedding of the watermark in the coding stream, possibly without decoding; Embedding of the watermark in the compressed domain
G06T 2201/0064
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2201General purpose image data processing
005Image watermarking
0064for copy protection or copy management, e.g. CGMS, copy only once, one-time copy
G11B 20/00463
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
0021involving encryption or decryption of contents recorded on or reproduced from a record carrier
0042the copy protection scheme being related to a specific access protection standard
00463high-bandwidth digital content protection [HDCP]
Applicants
  • APPLE INC. [US]/[US] (AllExceptUS)
  • HENDRY, Ian, C. [US]/[US] (UsOnly)
Inventors
  • HENDRY, Ian, C.
Agents
  • HAILS, Robert, L.
Priority Data
13/212,82118.08.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SECURING A HDCP LINK FROM GRAPHIC PROCESSOR GPU TO VIDEO DISPLAY
(FR) SÉCURISATION D'UN LIEN DE SYSTÈME DE PROTECTION DES CONTENUS NUMÉRIQUES HAUTE DÉFINITION (HDCP) DEPUIS UN PROCESSEUR GRAPHIQUE (GPU) VERS UN AFFICHAGE VIDÉO
Abstract
(EN)
Securing protected content during video playback. The embodiments provide a system that drives a display from a computer system. During operation, the system writes graphical output, generated from a copyrighted video file, to protected memory and drives the display from the protected memory. If the graphical output lacks copy protection, the system discontinues the driving of the display from the protected memory. In particular, upon detecting a lack of copy protection in the graphical output, the system continues to drive the display from the protected memory during a grace period associated with the lack of protection in the graphical output. The system then discontinues driving of the display from the protected memory if protection of the graphical output does not resume during the grace period.
(FR)
La présente invention concerne la sécurisation de contenus protégés lors d'une lecture de données vidéo. Selon des modes de réalisation, l'invention fournit un système qui commande un affichage à partir d'un système informatique. Lors du fonctionnement, le système effectue une écriture de données de sorties graphiques, générées à partir d'un fichier vidéo protégé par des droits d'auteur, dans une mémoire protégée et commande l'affichage depuis la mémoire protégée. Si la sortie graphique n'est pas protégée contre la copie, le système interrompt la commande de l'affichage depuis la mémoire protégée. En particulier, lors de la détection de manque de protection contre la copie dans la sortie graphique, le système poursuit la commande de l'affichage depuis la mémoire protégée pendant une période de grâce associée au manque de protection dans la sortie graphique. Le système interrompt ensuite la commande de l'affichage depuis la mémoire protégée si la protection de la sortie graphique n'est pas reprise pendant la période de grâce.
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