Abstract: A method and system for providing conditional access (CA) between a headend and a receiver include scrambling media data of broadcast programs and encrypting control words according to a CA system used on the headend. The receiver includes a CA virtual machine. The receiver receives the broadcast program and encrypted control words, and determines whether the media data is scrambled. If the media data is scrambled, the CA virtual machine runs a CA instance matched with the CA system, gets entitled manage message (EMM), and determines whether CA algorithm identifier in the EMM matches with CA algorithm identifier of the CA instance. If the CA algorithm identifiers match, the encrypted control words are decrypted and the scrambled media data is descrambled. If the CA algorithm identifiers do not match, updated CA algorithm is downloaded and the CA instance which has updated its CA algorithm is run.

Abstract: A broadcast system for media content sharing includes a receiver, a verification module, a communication module, a storage, a processor and a transmitter. The receiver receives a configuration information of a media program from a first client. The verification module verifies the configuration information of the media program. The communication module communicates with a second client to confirm a transmission time period when the verification performed by the verification module is passed. The processor transforms the media program as a data stream and stores the data stream in the storage. The transmitter transmits the data stream to the second client.

Abstract: A set top box (STB) for establishing a television (TV) program table, and comprises a searching module and a program establishing module. The STB searches a predetermined channel among multiple channels provided by a TV station office server to receive an extensible markup language (XML) file comprising TV program information transmitted by the TV station office server over the predetermined channel. The STB analyzes the XML file to obtain the TV program information and establishes a TV program table according to the TV program information.

Abstract: A method for displaying near video on demand (NVOD) content on a set-top box (STB) includes determining whether the processor is idle, and connecting to a video server for storing NVOD data, if the processor is determined to be idle. If a NVOD request is received from a user, the NVOD data is parsed according to the NVOD request and displayed via a NOVD interface.

Abstract: A set-top box (STB) includes a memory, a first tuner, a second tuner, and a decoder. The first tuner is configured for playing a current program on a current channel when in play mode, and for locking one or more subsequent channels after the current channel, and storing the intra frames from the programs on the subsequent channels in the memory when in browse mode. The second tuner is configured for storing the intra frames from the favorite programs in the memory when in play mode, and for storing the intra frame from the current program on the current channel in the memory when in browse mode. The decoder is configured for decoding the current program on the current channel into video and audio when in play mode, and for decoding the intra frames from the favorite programs in memory into images when in browse mode. A digital information system and a program browsing method are also provided.