Abstract:
A controller (900) for transferring media content rights between media devices comprising a memory (906), a user interface (910) and a transceiver (902). The memory (906) stores a list of media devices (914) capable of receiving the permissions associated with the media content from an originating device and an encryption key (920) that may be used to encrypt the permissions. The user interface (910) detects a user selection of a target device from the list of media devices (914). The transceiver (902) communicates an address (916) associated with the target device and the encryption key (920) to the originating device. Thus, the originating device is able to encrypt the permissions using the encryption key (920) and send the encrypted permissions to the address (916) associated with the target device.
Abstract:
IPTV-based systems offer acquisition and distribution of content from numerous channels with protected end-to-end conditional access. In.adopting IPTV-based systems for seamless transport and blackout management of the content, service providers would need an IPTV-based transport architecture that accommodates their existing infrastructure and provides transparent live events content blackout management. In the spectrum of service providers some have no physical infrastructure at all and some have the entire suite of infrastructure and services. Therefore, the present invention provides a new IPTV-based transport system architecture that can accommodate the spectrum of service providers, including tier-1, tier-2 and tier-3 telcos. Such architecture includes double -layer encryption and bulk decryption in addition to encapsulation that allows seamless transition from programs to alternate programs in designated blackout areas.
Abstract:
Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first frame using a first scrambling code (1300), attaching a first header to the first frame to create the first signal (1302), scrambling a second frame using a second scrambling code (1304), attaching a second header to the second frame to create the second signal (1306), and transmitting the first signal and the second signal over different channels of th communication system (1308).
Abstract:
This invention relates to a method for the transmission of management data to at least one multimedia unit or a group of multimedia units. This method is characterised in that said management data is sent in the form of at least one authorisation message encrypted by means of at least one synchronisation key (SK), the sending of said at least one authorisation message being repeated cyclically and intended for said multimedia unit or said group of multimedia units, and in that the synchronisation key is modified at least during each cycle.
Abstract:
The invention provides a method of transmitting a media work such as a movie to a client comprising the steps of (a) encrypting the work using a sequence of different keys corresponding to respective temporally spaced segments of the document, (b) transmitting software code containing an algorithm from a security server to the client, the algorithm having a result that is a function of the state of the client, (c) executing the code at the client and returning the result to the security server, (d) determining whether the result is indicative of an unmodified client, and further comprising the steps of : (e) transmitting a segment from a server to the client, (f ) securely streaming a key corresponding to the transmitted segment from a secure remote server to the client , (g)decrypting the segment using the obtained media key,(h)if step (d) indicates a modified client, preventing further keys from being transmitted, otherwise repeating steps (e) to (g) and repeating steps (b) to (d) .
Abstract:
A controller (900) for transferring media content rights between media devices comprising a memory (906), a user interface (910) and a transceiver (902). The memory (906) stores a list of media devices (914) capable of receiving the permissions associated with the media content from an originating device and an encryption key (920) that may be used to encrypt the permissions. The user interface (910) detects a user selection of a target device from the list of media devices (914). The transceiver (902) communicates an address (916) associated with the target device and the encryption key (920) to the originating device. Thus, the originating device is able to encrypt the permissions using the encryption key (920) and send the encrypted permissions to the address (916) associated with the target device.
Abstract:
A Digital Rights Management (DRM) system provides a lightweight layering of encryption and decryption of keys that allows efficient use of different cryptographic techniques to effect the secure delivery of multimedia content. Asymmetric cryptography, where a public key is used to encrypt information that can only be decrypted by a matched private key, is used by the DRM system to deliver symmetric keys securely.
Abstract:
Methods and apparatuses for minimizing co-channel interference in communications systems (400) are disclosed. A method in accordance with the present invention comprises scrambling a first header (401) of the first signal using a first scrambling code, and transmitting the first signal and the second signal with the scrambled first header and the scrambled second header (401) over different channels of the communication system.
Abstract:
According to one embodiment, an apparatus involves the descrambling of scrambled digital content using a one-time programmable key and digital rights management, the apparatus (110) comprises a processor (360) and a descrambler (380). The processor (360) is adapted to execut a Digital Rights Management (DRM) function (375) in order to determine whether each entitlement needed to access the digital content is pre-stored. The descrambler (380) is adapted to decrypt encrypted information using a Unique key (430) stored within the one-time programmable memory (400). After determining that each entitlement needed to access the digital content is pre-stored, the decrypted information is used to generate a key, which is used to decrypt at least one service key for descrambling the scrambled digital content.
Abstract:
A multimedia distribution device (Figure 2, 200) includes a nonvolatile memory (202) that stores a compressed media signal in which at least two scenes are selectively compressed using different codecs from a codec library, the codecs being automatically selected to produce a highest compression quality for the respective scenes according to a set of criteria without exceeding a target data rate. The nonvolatile memory (202) also stores a plurality of codec indicators (110a-d) specifying which codecs from the codec library were used to respectively compress each scene within the compressed media signal.