646 results about "Digital multimedia broadcasting" patented technology

An apparatus and method for transmitting and receiving broadcasting data in a DMB system are provided to reduce power consumption and implement smooth and seamless service handover. A frame group is configured so as to include information about services included in the frame group and information indicating the relative start times of the services.

Provided is a digital multimedia broadcasting (DMB) system that can provide a multimedia data broadcasting service having an excellent reception quality, a method thereof, and a computer-readable recording medium for recording a program that implements the method. The DMB system includes an encoding unit for encoding an inputted audio / video signal; a synchronizing unit for synchronizing media stream, additional data, interactive service objectifying data that are outputted from the encoding unit; a multiplexing unit for multiplexing the media stream outputted from the synchronizing unit; an error correction encoding unit for performing additional error correction encoding on the media stream outputted from the multiplexing unit; an interleaving unit for removing temporal correlation between adjacent byte units within a data stream outputted from the error correction encoding unit; and a transmitting unit for transmitting a DMB media stream outputted from the interleaving unit to the conventional DAB system and other digital broadcasting systems.

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.

An apparatus and method for transmitting and receiving broadcasting data in a DMB system are provided to reduce power consumption and implement smooth and seamless service handover. In the transmitting method, a frame group is constructed, which includes one frame group header and at least one signal frame including broadcasting data of a service. The frame group header includes service burst information about services included in at least one following frame group and a first parameter indicating the relative start time of each of the services. The frame group is transmitted in a broadcasting 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.

A unified antenna of shark fin type comprises a pad, a base disposed on upper surface of the pad and providing a space for arranging a printed circuit board and a plurality of antenna units, and a case for covering the pad and the base, wherein the antenna further comprises: a first antenna unit disposed in the middle of the printed circuit board and provided for receiving signal of AM / FM band; a second antenna unit disposed near the first antenna unit and provided for receiving signal of DMB (Digital Multimedia Broadcasting) band; and a third antenna unit disposed in front of the first antenna unit and provided for receiving signal of GPS (Global Positioning System) band, and a first auxiliary unit is disposed over the first antenna unit for enhancing electrical properties of the first antenna unit.

This invention is a multimedia broadcasting system and its realizing method that facing mobile terminal. It belongs to multimedia broadcasting field. Its feature is that it is based on orthogonal frequency division multiplexingí¬multiple channel system. multiple broadcasting service is provided to mobile terminal by the IFFT of emission terminal and the FFT of receive terminal. The transformation is done by allocating different channels on different sub carrier wave groups by using the frequency range of existing common television broadcasting system and big zone broadcasting type. It can provide media program of scores of channels efficiently and economically, and the utility factor is high. Individualization broadcasting can be realized for different quality needs subscriber. Dynamic power control, modulation, forward error correction encoding and frequency hopping can be realized to ensure the transmission quality. The receive terminal can be simply design and the power consumption can be reduced in this invention.

A method for providing a menu with a movable menu set and a multimedia device thereof are provided to offer convenient manipulation and excellent visual effect in a relatively small touch screen of the multimedia device. A multimedia function block(210) performs unique functions, such as a file search function, a game function, a recording function, music, moving picture, and photo playback functions, a document making function, and a DMB(Digital Multimedia Broadcasting) playback function, of a multimedia device. A GUI(Graphic User Interface) unit(220) provides a GUI implemented by using a menu set to an image generated by the multimedia function block. A touch screen(230) displays the image including the GUI, and receives touch, long touch, and dragging operations from a user. A control unit(240) enables the GUI unit to display the GUI corresponding to manipulation of the user on the touch screen.

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 method is provided for registering and displaying digital multimedia broadcasting (DMB) channels in a mobile terminal capable of receiving DMB. A selection of DMB mode is detected and electronic program guide (EPG) information is received. The received EPG information is analyzed and the analyzed received EPG information is divided into fixed program channel information and dynamic program channel information. The fixed program channel information is matched with a genre in which a fixed program channel has been registered, and a result of the matching is displayed. The dynamic program channel information is matched with a genre in which a dynamic program channel has been registered and a genre of a program currently being broadcast on the dynamic program channel, and a result of the matching is displayed.

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.

An apparatus and method for servicing both a wide area broadcasting and a local area broadcasting in a digital multimedia broadcasting system. The apparatus includes a means for transmitting program association tables and program map tables in a form of transport stream packets, wherein each of the program association tables includes packet identifications of program map tables corresponding to at least one wide area broadcasting program and at least one local area broadcasting program, and each of the program map tables includes detailed information about corresponding local area broadcastings.

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.

A method of using additional information at a DMB (Digital Multimedia Broadcasting) receiver is provided. The method includes the steps of: extracting and displaying additional information from a DMB signal; selecting and storing a desired one of the displayed additional information; displaying a list of the stored additional information depending on a user's request command; and outputting additional information selected at the list of the additional information.

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 method of operation of a transmitting node in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes generating a frame including a plurality of physical layer zones, each of the plurality of physical layer zones applying different Fast Fourier Transform (FFT) sizes and different pilot patterns; and transmitting the frame.

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 disclosed transmission system for mobile digital multimedia broadcast signal comprises: a channel coder to receive, code and interlace data flow to transform it into bit flow; a constellation mapper to map the bit flow into QAM, BPSK or QPSK signal flow; an OFDM signal forming module to insert the continual and discrete pilot frequency into last signal flow and load on the service sub-carrier to form OFDM signal; a framing module to add beacon into the OFDM signal and form transmission frame; and an up-conversion module to generate RF signal for transmission. It also discloses corresponding transmission and allocation method.

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.

An apparatus and method for enabling a user to view a multimedia broadcasting, especially for processing a multimedia audio signal when a voice call is requested during the multimedia broadcasting. In the mobile terminal, an RF module converts a received RF signal for a voice call to a coded signal. An audio processor converts the coded signal to an electrical voice signal and outputs it through a speaker. A demultiplexer receives a digital multimedia signal and separates it into an audio signal and a video signal. A decoder decodes the audio and video signals and provides the decoded audio signal to the speaker and the decoded video signal to a display. A controller discontinues decoding the audio signal and outputs the voice signal from the audio processor through the speaker, if a voice call request is generated during receiving of the digital multimedia signal.

An apparatus and method for providing signaling information using inband transmission in a digital video broadcasting system where a frame for transmitting broadcasting data according to a ground-wave broadcasting service and broadcasting data according to a mobile broadcasting service is generated, and the generated frame is transmitted with an additional area for recording recognition information that indicates whether signaling information to be transmitted in the generated frame or the frame to be transmitted next time has been changed is allocated to a signaling information field of the generated frame.

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.

A handover method and apparatus in a digital multimedia broadcasting (DMB) system that transmits / receives broadcast data through a frame group using different frequencies. A handover method includes receiving a first frame group header at a serving frequency, and receiving a burst of the desired service at the serving frequency according to a burst arrival time; calculating a first relative start time of a next frame group header; turning power off until a current time arrives at a next header arrival time; receiving a second frame group header at a searching frequency, and acquiring service information of the searching frequency necessary for handover to the searching frequency; returning to the serving frequency and turning the power off; and comparing signal power / quality of the listened frequencies with each other to select a best frequency, and switching to the selected frequency using the acquired corresponding service information.

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.

Error resilient methods and apparatus for coding, transmitting and / or storing digital multimedia data are disclosed. Digital multimedia data is organized into channel blocks, which include columns of data. A priority is determined for each channel block, based on the data within the channel block. Different forward error correction (FEC) procedures may be selected for the channel blocks based on their priority. Also, channel blocks may be transmitted on different transmission channels, and / or stored on different storage elements, based on their priority. Also disclosed is the coding, as pre-interleaved channel blocks, of digital multimedia data having fixed-length segments. The fixed-length segments are ordered and arranged in pre-interleaved channel blocks containing rows and columns. Pre-interleaving of a channel block arranges consecutive fixed-length segments along its columns. FEC data is determined for each row and included in the channel block. The channel blocks are packetized along the columns.

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.