摘要:
There is disclosed a computer-implemented method of encrypting a video file, the video file including a plurality of two or more levels of frames of the video file, wherein content of frames in level zero of the video file is displayable without depending on content of frames of any other level, and wherein content of frames in each level x not in level zero of the video file is displayable only using content of at least one or more frames not in level x of the frames of the video file, the method including the steps of: (i) accessing the video file including the plurality of two or more levels of frames of the video file, wherein the content of frames in level zero of the video file is displayable without depending on the content of frames of any other level, and wherein the content of frames in each level x not in level zero of the video file is displayable only using the content of at least one or more frames not in level x of the frames of the video file; (ii) encrypting the frames in level zero of the video file; (iii) assembling a file comprising a partially encrypted version of the video file, the partially encrypted version of the video file including level zero frames including the encrypted frames in level zero of the video file from step (ii), and further including the levels of frames of the video file that do not include level zero of the frames of the video file. Related methods of encryption and decryption are also disclosed. Related computer program products and apparatus are also disclosed.
摘要:
Systembox zum Empfang eines Videostreams, wobei der Videostream aus einem Studio gesendet wird, dadurch gekennzeichnet, dass die Systembox zumindest folgende Komponenten umfasst: einen Computer; einen Decoder; eine Empfangseinheit für die Datenübertragung; einen Videoanschluss für ein Anzeigegerät; eine Monitor-Kalibrier-Box (LUT Box) (29) und eine Stromversorgung, wobei die Systembox vorkonfiguriert ist zum Betreiben einer point-to-point Datenverbindung zu dem Studio und der Übertragung des Videostreams.
摘要:
Ce procédé de lecture d'un flux vidéo comporte: - la réception (92) d'un flux vidéo qui comporte, associées à chaque carreau d'une image, une variante haute qualité et une variante dégradée, cette variante dégradée étant apte à être décompressée indépendamment des variantes dégradées associées à d'autres carreaux qui n'ont pas les mêmes coordonnées et indépendamment de la variante haute qualité associée au même carreau, - pour chaque carreau sélectionné, le déchiffrement (118) et la décompression (120) de la variante haute qualité associée à ce carreau sélectionné et, pour chaque carreau non sélectionné, la décompression (126) de la variante dégradée associée à ce carreau non sélectionné, puis - la construction (130) de la version dégradée de chaque portion de l'image située à l'intérieur d'un carreau non sélectionné à partir de la variante dégradée associée à ce carreau non sélectionné.
摘要:
A media distribution system and method with sample variants for normalized encryption involves encrypting a main track of a media content asset using a first encryption scheme and encrypting a sample variant track of the media content asset using a second encryption scheme, and performing at least one of: storing the encrypted main track and encrypted sample variant track of the media content asset packaged in a storage format, and transmitting the encrypted main track and the encrypted sample variant track in a distribution container format to an edge media router (EMR) device configured to repackage the media content asset into a delivery container format without reencrypting the media content asset.
摘要:
A method is provided for delivering a streaming media asset to a client device. For the method, a request is received over a communication network from a client device for playing a media asset in accordance with a streaming media technique. Prior to fully authorizing the client device to play the media asset, the client device is provided with access to a first cryptographic key that decrypts a subset of the media asset so that the client device is able to render the subset of the media asset before completion of the authorization. The subset of the media asset is less than all of the media asset. Subsequent to successfully fully authorizing the client device to play the media asset, the client is provided with access to at least one additional cryptographic key that decrypts a remainder of the media asset.
摘要:
Innovations in the area of hardware-protected digital rights management ("DRM") systems are presented. For example, a hardware-protected DRM system includes a trusted layer and untrusted layer. In the untrusted layer, a control module receives source media data that includes encrypted media data. The control module processes metadata about the media data. The metadata, possibly exposed by a module in the trusted layer, is not opaque within the untrusted layer. In the trusted layer, using key data, a module decrypts encrypted media data, which can be the encrypted media data from the source media data or a transcrypted version thereof. A module in the trusted layer decodes the decrypted media data. A host decoder in the untrusted layer uses the metadata to manage at least some aspects of the decoding, rendering and display in the trusted layer, without exposure of decrypted media data or key data within the untrusted layer.
摘要:
Computer-implemented systems, methods, and computer-readable media for selecting a sequence of content parts from polymorphic content of an audiovisual presentation based on at least one profile of a user include receiving content information associated with polymorphic content, receiving profile information of a user, and selecting for rendering, from amongst the alternative content parts, a sequence of content parts from the polymorphic content based on at least a portion of the profile information.
摘要:
The present invention discloses a method for encrypting media content, a method for modifying attribute data (13) and a method for decrypting the media content. The method for encrypting media content according to the present invention comprises the steps of replacing and encrypting an attribute data (13) and replacing it with a modified attribute data (27). In another embodiment of the present invention, the method for decrypting the media content comprises the steps of replacing the modified attribute data (27) with the decrypted attribute data (45) and loading the full media content if the password (23) keyed in by the user is correct and the limitation parameter (21) is still within allowable range, whereas if the password (23) is not correct or the limitation parameter (21) is not within the allowable range, the media content will not be displayed in full. A further embodiment of the present invention describes a method which involves modifying the attribute data (13) according to a selected modification type.