645 results about "Digital multimedia broadcasting" patented technology

An apparatus and method for receiving a multimedia broadcasting service in a mobile communication system including a satellite digital multimedia broadcasting (DMB) reception system and a terrestrial DMB reception system. In the apparatus, a satellite DMB modem block demodulates a satellite broadcast signal received from the satellite DMB system. A terrestrial DMB modem block, sharing at least one function block with the satellite DMB modem block, demodulates a terrestrial broadcast signal received from the terrestrial DMB system. A Motion Picture Experts Group (MPEG) decoder separately decodes MPEG transport streams (TSs) for the satellite broadcast signal and the terrestrial broadcast signal.

A method and an apparatus are provided for displaying ensembles and services provided by digital multimedia broadcasting (DMB) so that a user can search for and select a desired service, and can determine, register, and manage a preferred service according to the user's inclination for watching TV. The method relates to displaying a broadcast program schedule provided by a digital multimedia broadcasting, and includes displaying ensembles included in the broadcast program schedule on a first window of a screen, and displaying services linked to each of the ensembles on a second window of the screen. Accordingly, it is possible for the user to easily view and select ensembles and services provided by DMB.

An apparatus for providing a supplementary function of digital multimedia broadcasting includes a control unit that receives a selected instruction message for a digital multimedia broadcasting signal input by a user, a demodulating unit that receives a digital multimedia broadcasting signal corresponding to the selected instruction message by using at least one tuner, a reception sensitivity confirming unit that confirms the reception sensitivity of the received digital multimedia broadcasting signal, and a determining unit that determines whether the received digital multimedia broadcasting signal is output in accordance with the confirmed reception sensitivity.

An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal can select a service network. A broadcasting providing server encrypts broadcasting service data, generates private and public keys into which predetermined encryption keys are divided to decrypt the encrypted broadcasting service data, sets at least one broadcasting transmitter for transmitting the private key and/or at least one broadcasting transmitter for transmitting the public key, and provides the encryption keys along with the encrypted broadcasting service data. Broadcasting transmitters transmit the encrypted broadcasting service data received from the broadcasting providing server and the private key using the SFN. At least one of the broadcasting transmitters further transmits the public key.

A transport stream, apparatus and method provide a value added service during a channel changing period in a digital multimedia broadcasting system, and a broadcast receiver. The transport stream includes program data configured by one or more broadcast programs and additional information corresponding to the broadcast programs; program map tables (PMTs) having detailed information of the broadcast programs and service information of the additional information; and a program association table (PAT) having packet identifiers of the PMTs corresponding to the broadcast programs.

The invention provides a system and mode of new signal multi-path multiplexing in OFDM broadcast network. In the invention, the mixed signals are modulated into different OFDM communication channels, each channel data includes a fixed quantity OFDM sub-carriers. Different Golay code, modulation and frequency expansion are used in communication of different service quality demand. The data is transmitted with data package of circular redundancy checking bit.

The present invention provides a method of activating MBMS, for realizing MBMS of appointed evolution base station. The method includes following steps: determining the object evolution base station; judging whether the object evolution base station transmitting MBMS or not; when the object evolution base station being not transmit MBMS, transmitting the first information for adding object evolution base station in the content distribution tree and transmitting radio resource distribution information to the object evolution base station by the MCE. The invention also provides an user equipment, an evolution base station, a MCE and a communication system.

A device and method for receiving digital multimedia broadcasting include a method for receiving a digital broadcasting signals, creating a playlist containing plural program items scheduled to be broadcasted through at least one broadcast channel, each program item having delimiters and program information; monitoring an advent of one of the delimiters; and performing, if a delimiter is detected, an operation corresponding to the delimiter. The device and method for receiving the digital multimedia broadcasting according to the present invention allow the user to create and edit a playlist, which contains at least one program items obtained from EPG data and information on the program items, and automates channel switching and playbacks of the program item, resulting in improved user convenience.

A terrestrial Digital Multimedia Broadcasting (DMB) system includes at least one broadcasting station for transmitting a digital broadcasting transmission frame containing predetermined service number information according to service, and a digital broadcasting receiver for receiving the digital broadcasting transmission frame and providing service number information contained in the received digital broadcasting frame according to service.

The invention provides a method of realizing multimedia broadcasting and group broadcasting operation transmission in-phase, the method includes: data is marked with time when generating multimedia broadcasting and group broadcasting operation data, and deciding the transmission time of empty port according to the time mark; calculating the data transmission frame number of areola based on the transmission time of empty port. The implement of the invention can realize the synchronization transmission of MBMS operation in an areola on condition that base station does not support node synchronization.

A device and method for receiving and transmitting digital multimedia broadcasting is disclosed. The transmitting device includes an MPEG4 system including at least one of an ES_Descriptor of an audio object and an ES_Descriptor of a visual object at a set position of an Initial Object Descriptor (IOD) syntax, and encoding data indicated by the IOD using MPEG4 compression algorithms, and an MPEG2 system including the IOD in a Program Specific Information (PSI) table, and encoding the PSI table and data received from the MPEG4 system into an MPEG2 mode and transmitting the encoded data.

The invention provides a method for improving radio resource utilization rate in multimedia broadcasting and multicasting services (MBMS). The method comprises the steps of: A. transmitting feedback/service receiving state order related to an MBMS service by a network side to a user terminal, wherein the MBMS service is distributed in a mode of broadcasting and multicasting single frequency network (MBSFN); B. feeding the service receiving state back to the network side by the user terminal when receiving the MBMS service; C. collecting the user terminal which feeds back the feedback/service receiving state by the network side so as to obtain the quantity of users who are currently receiving the MBMS service; and D. making a comparison between the quantity of the users and a preset threshold by the network side; if the quantity of the user is less than the preset threshold, activating the push mode of the MBSFN service of the MBMS service, or switching the mode into a single-casting mode to send the MBMS service. The method provided by the invention can utilize the radio resource at the maximum limit.

The invention discloses a method for achieving digital televisions in accordance to DVB standards in an Andriod system. The method is characterized by comprising the following steps: using a socket mode to achieve digital television functions in a second layer of the Andriod system; and providing the digital television functions achieved in the second layer for application programs in a Java application layer through a Java application program interface (API) for calling, achieving digital television functions in a C framework layer by using the socket mode, and providing the digital television functions achieved in the C framework layer for application programs in the Java application layer through the Java API for calling. Accordingly, a large number of digital television related applications can call the Java API directly; the problem that how Java applications achieve digital television software module functions by using a base layer C language through the Java API is solved; and development efficiency and portability of the Java applications are greatly improved.

The invention relates to one mobile digital multi-media broadcast signal channel coding and knitting method and device, wherein, the device comprises the following parts: LDPC coding device and inner knitting device by use of bit and outer coding and knitting device for data flow input on RS(240, M) for short codes and outer coding; then sending the outer codes and knitting data into LDPC coder, wherein, the M is for information bit length, then the outer coder and knit device for LDPC knitting to fulfill signal coding and knit process.

A system and method for selectively receiving only data broadcast information desired by a user from a digital multimedia broadcasting (DMB) data broadcast is disclosed herein. The system includes a terminal having a function of receiving a DMB data broadcast, a service network information (SNI) application management server that transmits SNI to the mobile communication terminal in response to a request from the mobile communication terminal, a data broadcast server that provides information regarding the DMB data broadcast, a DMB transmitting station that transmits the information regarding the DMB data broadcast, and a Transport Protocol Experts Group (TPEG) service provider that provides the SNI to the SNI management server, and data broadcast information including the SNI to the data broadcast server. The mobile communication terminal receives the SNI from the SNI management server via a cellular network to determine the time when a user's desired data broadcast starts, and receives a data broadcast from the DMB transmitting station only at that time.