A transmission device is disclosed. The transmission device comprises a signal generation unit for generating a broadcast signal including a service, and a transmission unit for transmitting the broadcast signal through at least one radio frequency (RF) channel. A broadcast stream transmitted through the RF channel includes signaling for the service, the signaling for the service including information indicating whether the service is transmitted through a plurality of RF channels, and information indicating whether the broadcast stream transmitted through the RF channel contains an essential portion of the service.

A transmission device is disclosed. The transmission device comprises a signal generation unit for generating a broadcast signal including a service, and a transmission unit for transmitting the broadcast signal through at least one radio frequency (RF) channel. A broadcast stream transmitted through the RF channel includes signaling for the service, the signaling for the service including information indicating whether the service is transmitted through a plurality of RF channels, and information indicating whether the broadcast stream transmitted through the RF channel contains an essential portion of the service.

A terminal device has a network interface that forces network connection when not connected to a network. The terminal device that has a network interface includes a connection check unit that makes a check as to whether the terminal device is connected to a network, and an invalidation unit that, when the connection check unit judges that the terminal device is not connected to the network as a result of the check, invalidates a function included in the terminal device.

A terminal device has a network interface that forces network connection when not connected to a network. The terminal device that has a network interface includes a connection check unit that makes a check as to whether the terminal device is connected to a network, and an invalidation unit that, when the connection check unit judges that the terminal device is not connected to the network as a result of the check, invalidates a function included in the terminal device.

A method for determining an identifier of a conditional access card used in a conditional access system, in which the conditional access card autonomously modulates the timing of data packets sent by the conditional access card, to form a timing sequence that corresponds to the identifier of the card. The sequence is generated by a predefined non-linear function stored on the conditional access card, and the predefined non-linear function depends on both the identifier of the conditional access card and a non-linear random sequence that is known to the conditional access card and a monitoring station that receives transmissions from the conditional access card.

A method for determining an identifier of a conditional access card used in a conditional access system, in which the conditional access card autonomously modulates the timing of data packets sent by the conditional access card, to form a timing sequence that corresponds to the identifier of the card. The sequence is generated by a predefined non-linear function stored on the conditional access card, and the predefined non-linear function depends on both the identifier of the conditional access card and a non-linear random sequence that is known to the conditional access card and a monitoring station that receives transmissions from the conditional access card.

Interaction method and system based on recommended content are provided. The method includes: receiving a playback instruction for a multimedia file, and obtaining recommended content corresponding to the multimedia file; playing the recommended content at a designated playback time point of the multimedia file; displaying an interaction option of the recommended content in a playback interface of the recommended content in a process of playing the recommended content; and interacting with the recommended content based on the interaction option after detecting a selection operation on the interaction option. A user may trigger the selection operation on the interaction option to interact with the recommended content, rather than watching the recommended content passively, which provides the user with method and system for interacting with the recommended content, increases flexibility, enhances attractiveness of the recommended content to the user, increases user viscosity, and increases a conversion rate of the recommended content.

Embodiments of a system including a display device are described herein. For example, the system may receive streaming video data including information indicating a video quality identifier and apply a video parameter enhancement to a subsystem of the display device. In a further example, the system outputs video using the video parameter enhancement. In another example, the video parameter enhancement may he applied to alter an output characteristic of the display device.

Embodiments of the present disclosure disclose and provide a method and terminal device for providing multimedia content. The method for providing multimedia content includes: receiving a download request for multimedia content from a client; generating a first predetermined quantity of download information items according to the download request, where the download information items include download addresses of content slices of the multimedia content respectively, and the first predetermined quantity of content slices are a beginning first quantity of content slices of the multimedia content; and sending the first quantity of download information items to the client. A playing starting speed of multimedia content can be increased by means of this method.

A system and method for automatically determining if certain operational states of a plurality of networked media appliances are causally connected with those appliances becoming unstable and/or having a software crash. Once these certain operation states are identified, a command prohibiting each of the networked media appliances from entering the identified state is generated and transmitted to the media appliances. The generated commands effectively insulate the media appliances entering the prohibited state, thereby eliminating a possible cause of a software crash without requiring the appliances to undergo a software update or the installation of a software patch.