Described herein are systems and methods for securing transmission of content from a smart card in a host television receiver to a client television receiver. The smart card can receive the encrypted content stream from the television service provider, decrypt the content stream with the global network key, identify the client television receiver as the destination of the content stream, generate a unique key specific to the content stream, encrypt the unique key with a local key known to the client television receiver, encrypt the content stream with the unique key, and transmit the encrypted content stream along with the encrypted unique key to the client television receiver. The client television receiver can then receive the encrypted content stream and the encrypted unique key, decrypt the unique key, decrypt the content stream with the unique key, and transmit the content stream to a display device of the client television receiver.

A video signal processing device includes an SoC that receives input of a plurality of video signals, each including a plurality of packets, and multiplexing the video signals to output a multiplexed video signal, and an FPGA that receives input of a multiplexed video signal and demultiplexes the multiplexed video signal to output the plurality of video signals. When deficient data whose size is less than the size of one packet is detected in any of a plurality of video signals, the FPGA performs one of (i) processing for discarding the detected deficient data and (ii) processing for adding dummy data to the detected deficient data to make the size of the deficient data equal to the size of an integral multiple of one packet.

A method to transfer a video stream from a host device comprising a controller configured for bulk transfers to a descrambling device, comprises: forming a chain out transfer comprising a chain out header linked with multiple chain out descriptors, the first chain out descriptor pointing to an out description packet containing at least one producer ID, the second and subsequent chain out descriptor pointing to chunks from the video stream, the last chain out descriptor being configured to generate an interrupt; forming a chain in transfer comprising a chain in header linked with a plurality of chain in descriptors, each chain in descriptor pointing to a descrambled chunk; requesting the controller to process the chain; receiving the description packet by the descrambling device and using key data associated with the chunks to descramble them; receiving by the controller the descrambled chunks and triggering an interrupt on the last chunk.

A data transmission system in a communication network comprising a data modulator comprises: a first part at the level of the collection point part comprising: an NCR module taking account of an external absolute time reference to reconstitute a network clock, a transmitter module receiving the value of a time reference to be inserted into the data packet to be transmitted and transmitting to the NCR module an information item on an instant of synchronization for the receiver, a second part at the level of the radiofrequency part of a gateway comprising; a receiver module, a module for reconstructing a clock locally, a module for inserting a time reference into a data packet received by the receiver before transmission of the data via the satellite, the first part and the second part exchange encapsulated data.

Described herein are systems and methods for securing transmission of content from a smart card in a host television receiver to a client television receiver. The smart card can receive the encrypted content stream from the television service provider, decrypt the content stream with the global network key, identify the client television receiver as the destination of the content stream, generate a unique key specific to the content stream, encrypt the unique key with a local key known to the client television receiver, encrypt the content stream with the unique key, and transmit the encrypted content stream along with the encrypted unique key to the client television receiver. The client television receiver can then receive the encrypted content stream and the encrypted unique key, decrypt the unique key, decrypt the content stream with the unique key, and transmit the content stream to a display device of the client television receiver.

A method of operation of an audio/video content receiver having a content decoder capable of decoding an audio/video program from a packetized data stream by using data packets defining decryption information comprises the steps of: receiving encoded audio/video content as a packetized data stream comprising one or more programs having data packets identified by respective sets of one or more packet identifiers and comprising identification data mapping programs to respective sets of the packet identifiers; selecting data packets from the packetized data stream for a required program according to the set of packet identifiers defined by the identification data for that stream in respect of the required program; selecting further data packets from the packetized data stream from which a program is selected which have packet identifiers not included in the identification data for that packetized data stream; generating a composite packetized data stream from the selected packets; generating composite stream identification data indicating packet identifiers of packets included in the composite packetized data stream; and supplying the composite packetized data stream to the content decoder for decoding the program from the composite packetized data stream according to the packet identifiers in the composite stream identification data.

Provided is a transmission device including a stream input unit configured to input a plurality of streams each constituted of continuous packets, a stream synthesizing unit configured to synthesize the plurality of input streams to obtain one stream, and a stream transmission unit configured to transmit the one obtained stream. The stream synthesizing unit encodes at least a typical pattern portion of each packet of the plurality of streams using keys that are intrinsic to the respective streams for separation of packets of each stream on a reception side, and thereafter performs time-division multiplexing on the packets of the plurality of streams to obtain the one stream.

An audio/video content receiver decoding audio/video signals modulated onto transmission channels as transport streams, at least one transmission channel carrying non-viewing information. The content receiver includes a tuner arrangement for concurrently tuning to two or more transmission channels and a multiplexer configured to generate a composite signal from received audio/video signals of required programs for decoding. The content receiver further includes a content decoder for concurrently decoding two or more audio/video programs from the composite signal and a detector configured to detect whether one or more of the transmission channels tuned by the tuner arrangement are not currently in use for providing a program for decoding. Finally, the content receiver includes a controller that, responsive to detection that a transmission channel is not currently in use, controls the tuner to tune that channel to a transmission channel carrying a transport stream including non-viewing information.

A broadcasting receiver and a method of determining an operation mode of broadcasting receiver are disclosed. A host device transmits the resource information including A-mode resource information. And a POD receives the resource information and determining an operation mode based on the received resource information and operation mode setting information. The broadcasting receiver can protect content data received from all the transfer protocols including the wired/wireless network and the IP protocol, using the conditional access provided from the conventional cable card. The broadcasting receiver determines whether the host supports the A-mode and determines a method for receiving broadcast data, such that the operation mode of the broadcasting receiver can be properly established according to the determined result.

An embodiment of the present disclosure discloses a method and a device for controlling access to interaction functions of a smart TV. The method comprises steps of: receiving a command for starting a card list, wherein the card list comprises a plurality of cards and every card has corresponding interaction functions; acquiring at least one card from a server; selecting at least one card needed to be shown from the required at least one card; acquiring show information of at least one card needed to be shown, wherein the show information comprises an access to the card; and showing the show information of the at least one card needed to be shown in the card list. According to the operation strategies of the server and the current program module the card list belongs, the present disclosure configures the card show information (including the access to the card) in real time, thus greatly improving user experience.