43 results about "China Multimedia Mobile Broadcasting" patented technology

The present invention provides a method for playing the China mobile multimedia broadcasting services. The method comprises the following steps: judging by a data card whether a current subscriber has passed authentication; transmitting by the data card China mobile multimedia broadcasting data to a terminal device according to the judgment result; and playing by the terminal device the China mobile multimedia broadcasting data. The present invention further provides an apparatus for playing the China mobile multimedia broadcasting services, wherein the apparatus for playing the China mobile multimedia broadcasting services comprises: an authentication judging unit; a transmitting unit; and a playing unit. The present invention overcomes the problem that the method for playing the China mobile multimedia broadcasting services in relevant art can only play the clear China mobile multimedia broadcasting program streams without authentication thus limiting the control to the subscriber authority by the providers, and thus achieving the authority control of the providers to subscribers to demand China mobile multimedia broadcasting programs.

A method of estimating coarse frequency offset of received symbols based on a received frequency domain sample at a k^th sub-carrier of a 53^rd Orthogonal Frequency Division Multiplexing (OFDM) data symbol in a j^th time slot (TS) of a receiver in a China Multimedia Mobile Broadcasting (CMMB) mobile television network includes dividing a received sample, Y_k^j, into two sets of noise only tones and data plus noise tones D_k^j, obtaining a received sample only if there is a coarse frequency offset mismatch between a transmitter and the receiver, dividing a summation of a power of the data plus noise tones by a summation of a power of the noise only tones to obtain Λ_k^j, and estimating an integer coarse frequency offset estimate, Δ{circumflex over (f)}_I^j, of the received symbols when the Λ_k^j is a maximum.

The invention discloses a method for converting a transport stream program into a China Mobile multimedia broadcasting program. Take out the packaged basic code stream package from the stream package; when the transport stream forms a complete packaged basic code stream, take out the packaged basic code stream package from the MPIC transport stream package, and extend the packaged basic code stream to the display time in the header stamp or decoded timestamp, and convert it into the timestamp in the multiplexed frame; take out the elementary stream packet in the packaged elementary code stream, and fill the video elementary stream packet into the video unit according to the requirements of the China Mobile Multimedia Broadcasting Multiplexing Protocol, or Fill the audio elementary stream packet into the audio unit, form a multiplex frame within the set time; encapsulate the multiplex frame and send it.

The invention discloses a method for notifying programs among China Mobile Multimedia Broadcasting (CMMB) terminals. The method comprises the following steps that: a CMMB terminal adds a channel identification that a user wants to share with other users to the content of a short message, and sends the short message to the other users specified by the user. The invention also discloses a system for notifying the programs among the CMMB terminals, which comprises a sending end, a receiving end and a short message center, wherein the sending end is used for adding the channel identification that the user wants to share with the receiving end to the content of the short message, and sending the short message to the short message center, wherein the short message carries number information of the receiving end; the short message center is used for forwarding the received short message to the receiving end; and the receiving end is used for receiving the short message carrying the channel identification. Compared with the prior art, the method and the system for notifying the programs among the CMMB terminals can notify the programs among the users conveniently and timely to realize program share; and program information is filled in and sent automatically in a background so as to simplify user operation and ensure accuracy.

The invention discloses a conversion method from the TS into the CMMB Reuse Protocol, which comprises the following steps: taking out the video PES or audio PES in a time-stamp respectively according to the grouping identifier in the TS; taking out the PES package from the MPEG transport package; taking out the PTS or DTS from the PES packet header and transforming into the time-stamp in the frames, the TS is used to set the presentation time of the video data or the audio data and to realize the synchronization of the video and audio broadcasting; according to the requirements of CMMB Reuse Protocol filling the video frequency ES package into the video unit or filling the audio frequency ES package into the audio unit to form a reuse frame within the set time limit; judging whether the data encapsulation within the set time limit is finished or not according to the time-stamp in the reuse frame; encapsulating and sending the reuse frame if the data encapsulation in the setting time is finished.

The invention discloses an implementation method for a mobile multimedia broadcasting interactive service. The method comprises the following steps that: after a mobile communication network interactive service platform accepts an interaction request of a CMMB (China Mobile Multimedia Broadcasting) service platform, the CMMB service platform sets a plurality of interactive contents for one program, and description information corresponding to the interactive contents, and transmits the setting result to a mobile terminal; when broadcasting the program, the mobile terminal judges whether the interactive contents corresponding to the program are stored in itself, if so, the mobile terminal sets a list corresponding to the plurality of interactive contents so as to prompt users to perform interaction. The invention also discloses a CMMB service platform and an implementation system for the mobile multimedia broadcasting interactive service. With the method, the CMMB service platform, the mobile terminal and the implementation system, one program can be corresponding to a plurality of interactions in the CMMB system, and user experience is improved.

The method comprises: extracting the PES packet from TS packet; extracting the PTS or DTS from the PES extended packet, and converting the PTS and DTS into the time stamp in multiplexing frame; extracting the ES packet from PES, and according to the CMMB multiplexing protocol, filling the video ES packet into the video unit, or filling the audio ES packet into the audio unit; encapsulating the multiplexing frame and transmitting it.

The invention relates to an earphone antenna used for China mobile multimedia broadcasting. The earphone antenna comprises an earphone plug, an earphone audio line and a first descrambling circuit, wherein the earphone plug is used for connecting a receiving terminal and is used as a feed point of the earphone antenna; one end of the earphone audio line is connected with the earphone plug, and the earphone audio line is used as the earphone antenna; and the first descrambling circuit is connected with the other end of the earphone audio line and is used for eliminating interference caused by audio signals on the earphone audio line with the earphone antenna. A receiving terminal adopting the earphone antenna used for the China mobile multimedia broadcasting is not needed to occupy internal space, and is favorable for enhancing the strength of received signals.

The invention provides a method, a base station and a terminal for realizing the bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting). The method comprises the following steps of: configuring resources of N time slots but the first time slot TS0 in the CMMB wireless frame as uplink transmission resources, configuring resources of other time slots as downlink transmission resources, and sending the resource configuration information to the terminal via the first time slot TS0 of the wireless frame. The invention not only can realize that the base station broadcasts multimedia data to each terminal, but also can realize that each terminal sends the multimedia data to the base station, that is the bidirectional transmission of the multimedia data based on CMMB, thereby making fuller use of the advantages of CMMB.

The invention discloses a check node updating circuit and method of an LDPC (low-density parity-check) decoder. The check node updating circuit comprises a decomposition circuit, a subtraction circuit, a sign bit and data bit decomposition circuit, a data evaluation circuit, a sign bit processing circuit and a merging circuit. The check node updating circuit disclosed by the invention is based on 1/2 code rate LDPC codes used in the China Mobile Multimedia Broadcasting standard, and the decoding method adopts a layered min-sum algorithm and is based on a minimum value and second smallest value calculation algorithm of a pointer. The check node updating circuit disclosed by the invention is low in implementation complexity and few in used hardware resources, and can be used for saving the number of comparators and preventing excess information from being generated.

The invention discloses a vehicle-mounted navigation system with an improved structure. The vehicle-mounted navigation system comprises a power supply module, a CPU (Central Processing Unit), a core control module and an LCD (Liquid Crystal Display) module, wherein the power supply module is connected with the CPU and the core control module respectively and electrically; the CPU, the core control module and the LCD module are sequentially and electrically connected with one another. The vehicle-mounted navigation system with the improved structure is provided with a radio assembly, a power amplifier output module, a multimedia player, a Bluetooth module, an interactive decoder, a back-up rearview input module, an IPOD interface, a CMMB (China Multimedia Mobile Broadcasting) module and a 3G (3rd Generation Telecommunication) module, wherein the radio assembly is electrically connected with the CPU; the multimedia player, the Bluetooth module, the interactive decoder, the back-up rearview input module, the IPOD interface, the CMMB module and the 3G module are respectively and electrically connected with the core control module; a sound effect control module is arranged between the power amplifier output module and the CPU. With the structural design, the vehicle-mounted navigation system has various functions and a good humanized design effect.

The invention provides an video and audio format conversion method, which comprises the following steps of: receiving first video and audio data, establishing a second video and audio file in a second video and audio format, acquiring first audio data and first video data from the first video and audio data, converting the first audio data and the first video data into the second video and audio format, and storing the first audio data and the first video data into the second video and audio file. In the video and audio format conversion method provided by the invention, after the first video and audio data is resolved to obtain the first video data and the first audio data, the first audio data is converted and stored as second audio data, the first video data is converted and stored as second video data, and the second audio data and the second video data are written into a media data box (mdat) in a 3GP video and audio format, so that various China mobile multimedia broadcasting (CMMB) programs can be appreciated by an electronic mobile device not supporting CMMB.

The invention discloses a CMMB player and a playing method, which have low independence on hardware and relatively high portability and flexibility. The CMMB player comprises a tuning control module, a CMMB source filter, a CMMB de-multiplexer and an output module, wherein the tuning control module is used for sending a tuning control command to the CMMB source filter; the CMMB source filter is used for controlling CMMB equipment to modulate frequencies according to the tuning control command of the tuning control module, receiving a multiplexed sub-frame which is sent by the CMMB equipment and outputting the multiplexed sub-frame to the CMMB de-multiplexer through an output PIN; the CMMB de-multiplexer is used for de-multiplexing and separating the received sub-frame and outputting the separated data to the output module through the output PIN; and the output module is used for decoding and displaying the data which is output by the CMMB de-multiplexer.

The invention discloses a realizing device of bit interleaving in china mobile multimedia broadcasting, which comprises a control module, an address changing module and a solos RAM; wherein, the control module can judge the read in or read direction of the data according to the former data read or read in direction and inform the address changing module of the read and read in direction; the address changing module can calculate the data read in or read solos RAM address according to the read and read in direction sent from the control module; the solos RAM read or read in data according to the address sent from the address changing module; the invention also discloses the realizing method of bit interleaving in china mobile multimedia broadcasting, which can reduce the area of hardware and effectively improve the utilization of RAM so as to realize the control of cost finally.

The invention relates to a logic channel configure method for a China mobile multimedia broadcasting (CMMB) system. The method comprises the following steps of: 1. reserving continuous time slots in channel transmission frames to serve as dynamic configure regions; 2. arranging a service auto-configure server (SACS) for each dynamic configure region; 3. setting parameters needing to be stored on the SACSs; and 4. starting the SACSs to begin implementing service events. The method has the following beneficial effects: auto configure of the service logic channels is realized by arranging one SACS; the configure process of the service logic channels is simplified; short-time service support is facilitated; the capability of automatically switching services at fixed time is provided; and the compatibility with the existing configure modes is retained.

A method for transmitting an electronic service guide (ESG) includes: an ESG center encapsulating ESG information of a mobile television channel as a dynamic content delivery (DCD) content, and sending the encapsulated DCD content to a DCD server; and a mobile television terminal establishing a connection with the DCD server, and obtaining the DCD content encapsulating the ESG information from the DCD server. Accordingly, the present invention also provides a system for transmitting an ESG, an ESG center and a mobile television terminal. By using the technical scheme of the present invention, the fussy process of the conventional method for obtaining the ESG is avoided, and at the same time, the real time of the ESG information is guaranteed, the overall performance of the China mobile multimedia broadcasting (CMMB) mobile television is enhanced, and the user experience is extremely improved.

The invention discloses a method for data service transmission, which comprises the following steps: determining multiplex sub-frames used by international protocol (IP) data packets corresponding to difference data services received currently for transmission respectively; and encapsulating all IP data packets using the same multiplex sub-frame for transmission into the same multiplex sub-frame and transmitting the data packets to a terminal. The invention also discloses a system and a device for data service transmission. The method, the system and the device of the invention can realize flexible configuration of data services and facilitate the flexible operation of the IP-based data services in a China mobile multimedia broadcast (CMMB) system.

The present invention discloses a method and a terminal for broadcasting a mobile television service. The mobile terminal includes: a human-machine interactive interface, a control module, a China Mobile Multimedia Broadcasting (CMMB) module and a Service Guide (SG) module; and the method includes: the terminal acquiring available frequency point information in a network via a full-frequency scan and downloading the Continual Service Multiplex Configuration Table (CMCT) of each available frequency point, when judging that at least one frequency point number is invalid in the SG; after a user selects a service in the SG, the terminal searching for the corresponding frequency point number in the content of the CMCT according to the service identification information of a service, if judging that the frequency point number corresponding to the service in the SG is invalid; and then the terminal processing in accordance with the existing playing flow based on the found frequency point number. After the present invention is adopted, services can be broadcasted normally even if frequency point information is incorrectly configured in some area such as a county-level city, thus giving the user a good user experience.