The present application discloses a method, a device, a server and a terminal equipment for cross-screen interaction. The method includes: performing coding and modulation on an interaction content identity to generate a first audio signal imperceptible to human hearing; superposing the first audio signal and a second audio signal of a video content, and sending the video content with audio superposition to a display device to play; and receiving the code of the interaction content identity sent by a terminal equipment after detecting the first audio signal, sending the interaction content corresponding to the code to the terminal equipment, and displaying the interaction content by the terminal equipment.

A distributed database management system provides a central database resident on a server that contains database objects. Objects, e.g., program guide data, to be replicated are gathered together into distribution packages called slices, that are transmitted to client devices. A slice is a subset of the central database which is relevant to clients within a specific domain, such as a geographic region, or under the footprint of a satellite transmitter. The viewer selects television programs and Web content from displayed sections of the program guide data which are recorded to a storage device. The program guide data are used to determine when to start and end recordings. Client devices periodically connect to the server using a phone line and upload information of interest which is combined with information uploaded from other client devices for statistical, operational, or viewing models.

Described are methods and apparatuses, including computer program products, for personalizing media content. A server determines content data likely to be requested by users, and generates common sets of information using the content data. The server receives a request for a digital media stream from a client device, and generates a first set of frames which include content data specific to the user and keys corresponding to a selected common set of information. The server combines the first set of frames and the requested stream to generate a personalized stream. The server transmits the personalized stream to a downstream device, which generates a second set of frames using content data corresponding to the one or more keys. The downstream device combines the second set of frames and the personalized stream to generate an updated stream, and transmits the updated stream to the client device.

An example method includes facilitating installation of a data collector on a media device; collecting, via the data collector, a media identifier indicative of media presented at the media device; encrypting a user identifier that identifies the user of the media device, the encrypting of the user identifier based on a first encryption key corresponding to a first database proprietor having first user information associated with the user identifier; encrypting a device identifier that identifies the media device, the encrypting of the device identifier based on a second encryption key corresponding to a second database proprietor having second user information associated with the device identifier; sending the media identifier to a data collection server; sending the encrypted user identifier to a second server associated with the first database proprietor; and sending the encrypted device identifier to a third server associated with the second database proprietor.

Systems and methods for combining a plurality of transport streams into a single transport stream for transmission to, e.g., a single frequency network via a satellite. Embodiments provide receiving a plurality of original, e.g., MPEG-compliant, data streams, where each original data stream has its own timing information, combining the plurality of original data streams into a single combined data stream which is also, e.g., MPEG compliant, modulating the single combined data stream for uplink to a satellite, receiving a downlink transmission from the satellite, where the downlink transmission includes the single combined data stream, de-combining the single combined data stream into the plurality of original data streams, and passing respective original data steams to, e.g., one or more DVB-T modulators for broadcast into a single frequency network.

Systems and methods of motion detection on encrypted or scrambled video data streams are provided. Some methods can include identifying macroblock size information for an encrypted/scrambled video data stream and using the identified macroblock size information to determine a presence of motion in the encrypted/scrambled video data stream without decrypting and descrambling the encrypted/scrambled video data stream.

A method for defense against primary user emulation attacks in cognitive radio networks includes the steps of generating an advanced encryption standard (AES)-encrypted reference signal with a transmitter for transmitting to at least one receiver. The method also includes the steps of allowing a shared secret between the transmitter and the at least one receiver and regenerating the reference signal at the at least one receiver and using the regenerated reference signal to achieve accurate identification of authorized primary users as well as malicious users.

A jukebox system, including a server that stores a master library of audiovisual selections; a plurality of jukeboxes, each of which is operable to store audiovisual selections received from the server and to play the audiovisual selections at the request of a user; a communication system through which the server and the jukeboxes communicate; wherein the server is operable to define authorized uses for the audiovisual selections received from the server; and further wherein the authorized uses correspond to various rights that third parties have in the audiovisual selections, the rights requiring by law or regulation payment of respective royalties; and further wherein the server maintains information on the authorized uses made by each of the jukeboxes and determines the amount of royalties due.

This application provides an online streamer image picture transmission method and computing device in live interaction. The method applied to a server, the method includes: receiving an online streamer image picture sent by a first online streamer end, and obtaining a target obfuscation key; performing encryption processing on the online streamer image picture based on the target obfuscation key and picture information of the online streamer image picture, to obtain an encrypted online streamer image picture; and in response to determining that a live interaction request for the first online streamer end and a second online streamer end is received, sending the encrypted online streamer image picture and the target obfuscation key to the second online streamer end.

Determining and hiding a replaceable period of a MP (Media Presentation). A method for determining includes receiving a first MPD (Media Presentation Description) that identifies a predetermined period and at least one media segment of the MP to be presented during the predetermined period. A determination is made as to whether the first MPD includes additional data to be resolved by an application. The additional data is provided to the application when the first MPD is determined to include the additional data. Additional period information is received from the application. A second MPD is generated based on the received additional period information. The MP is output for display to a user based on the second MPD. Each of a subset of the at least one media segment for a replaceable sub-period of the MP is replaceable with an alternate media segment.