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 kth sub-carrier of a 53rd Orthogonal Frequency Division Multiplexing (OFDM) data symbol in a jth time slot (TS) of a receiver in a China Multimedia Mobile Broadcasting (CMMB) mobile television network includes dividing a received sample, Ykj, into two sets of noise only tones and data plus noise tones Dkj, 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 Λkj, and estimating an integer coarse frequency offset estimate, Δ{circumflex over (f)}Ij, of the received symbols when the Λkj 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 transmitting multi-mode data traffic in mobile multimedia broadcasting system. Different service data are encapsulated into corresponding service data packets according to data traffic mode and corresponding protocols; then, the service data in different modes are packed to generate extensible multi-protocol encapsulation packets according to extensible multi-protocol encapsulation syntax structure; subsequently, the extensible multi-protocol encapsulation packets are fitted to data field of China mobile multimedia broadcasting multiplexing subframe; finally, the China mobile multimedia broadcasting multiplexing subframe is multiplexed and modulated to realize the multi-mode data traffic transmission based on China mobile multimedia broadcasting system. The invention further defines the mobile multimedia broadcasting data protocol hierarchy to effectively realize transmission and receiving of multi-mode data traffic in mobile multimedia broadcasting system; so users can receive multi-mode data traffic conveniently and rapidly; thereby, the user experience is greatly improved.

A method of estimating coarse frequency offset of received symbols based on a received frequency domain sample at a kth sub-carrier of a 53rd Orthogonal Frequency Division Multiplexing (OFDM) data symbol in a jth time slot (TS) of a receiver in a China Multimedia Mobile Broadcasting (CMMB) mobile television network includes dividing a received sample, Ykj, into two sets of noise only tones and data plus noise tones Dkj, 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 Λkj, and estimating an integer coarse frequency offset estimate, Δ{circumflex over (f)}Ij, of the received symbols when the Λkj is a maximum.

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 invention relates to a CMMB mobile USB dongle with a card reader of a Micro SD storage card, which is mainly used for receiving China mobile multimedia broadcast signals. The USB dongle comprises a CMMB signal receiving demodulation circuit, a card reader circuit of the Micro SD storage card, a USB HUB (network) circuit and a USB interface; two path signals of the CMMB signal receiving demodulation circuit and the card reader circuit of the Micro SD storage card are connected to the USB HUB circuit, and then are connected to a computer by the USB interface. The CMMB mobile USB dongle with the card reader of the Micro SD storage card both has the function of the CMMB mobile USB dongle and the function of the card reader of the storage card, and only occupies one USB interface of the computer.

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 discloses an automotive combined antenna. The atuomotive combined antenna is a fin-shaped combined antenna for receiving a frequency modulating signal, a China mobile multimedia broadcasting signal, a global positioning system signal and a global mobile communication system signal. The automotive combined antenna comprises the components of: an amplitude / frequency modulation receiving part which is used for receiving amplitude / frequency modulation signal; a China mobile multimedia broadcast receiving part which is used for receiving a China Mobile multimedia broadcasting signal; a global positioning system receiving part which is used for receiving a global positioning system signal; a global mobile communication system / universal mobile communication system which is used for receiving the global mobile communication system / universal mobile communication system signal; and a power supply part which is used for supplying power to the amplitude / frequency receiving part. Therefore, the automotive combined antenna has an advantage of no requirement for forming a single antenna according to each wireless service.

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 method for cooperating a Bluetooth cell-phone and a CMMB / Bluetooth Gateway for receiving and watching mobile multimedia telecast and a system thereof. The method includes the following steps: a cooperative control module is arranged on the CMMB / Bluetooth gateway; the signal type that CMMB / Bluetooth gateway exports is set, or a cooperative client-terminal on a Bluetooth cell-phone is arranged; the CMMB / Bluetooth gateway receives a mobile multimedia broadcasting signal; the cooperative control module judges the type of the signal exported to the Bluetooth cell-phone according to user setting or the negotiated result of the cooperative client-terminal, and the CMMB / Bluetooth gateway exports the signal of the type to the Bluetooth gateway; the Bluetooth cell-phone processes the received signal to display the program for the user. The invention can use the existing Bluetooth cell-phone for receiving and watching mobile multimedia telecast, and overcome the disadvantage that replacement of abundant cell-phone terminals is required to receive and watch TV program broadcasted by China Mobile Multimedia Broadcasting platform.

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.

The invention provides a method for achieving coloring ring back tone order, a mobile multimedia broadcast system and a mobile terminal. In the system, a multimedia broadcast platform is used for transmitting an electronic service instruction to the mobile terminal, carrying coloring ring back tone order service instruction information in a service parameter identification field of broadcasting program content elements in the electronic service instruction, and carrying the coloring ring back tone order information in an extend information character string field of the broadcasting program content elements in the electronic service instruction; the mobile terminal of the system is used for analyzing the coloring ring back tone order service instruction information in the service parameter identification field of the content elements in the electronic service instruction, and then analyzing the coloring ring back tone order information in the extend information character string field of the broadcasting program content elements; and the mobile terminal of the system is also used for performing the coloring ring back tone order according to the coloring ring back tone order information. The method, the mobile multimedia broadcast system and the mobile terminal are convenient for users to order corresponding coloring ring back tones for the liked contents, are simple and easy to achieve, and provide service growth points for providers and operators of China mobile multimedia broadcasting contents.

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 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 discloses a method used for quickly searching television program information, comprising the steps as follows: mobile terminal equipment which supports China Mobile multimedia broadcast (CMMB) downloads the program information of each channel from an electronic service guide (ESG) server and summarizes into an all-program information list; when the user searches the programs on the mobile terminal equipment, the mobile terminal equipment searches the information of the program in the all-program information list and displays the information of the program. The invention also discloses a device which is used for quickly searching the television program information; the device is arranged inside the mobile terminal equipment which supports the CMMB; the device comprises a program-information gaining unit, a program information providing unit and a memory unit. The method and the device can directly search in all available channel playing program list and save the searchingtime.

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 invention discloses a method and system for controlling time frequency synchronization, belonging to the field of CMMB (China Mobile Multimedia Broadcasting) digital television. The method comprises the following steps: powering on the system and performing continuous search; after the continuous search, performing discontinuous search according to a set correlation calculation length and a time slot search range to obtain a synchronous position; demodulating data according to the synchronous position to obtain the demodulated data; performing channel estimation according to the demodulated data to obtain a channel state; obtaining the correlation calculation length and time slot search range corresponding to the channel state to be used as the parameters of the next discontinuous search; and performing the discontinuous search, data demodulation and channel estimation repeatedly in turn, wherein the correlation calculation length and time slot search range corresponding to the channel state obtained each time are used as the parameters of the next discontinuous search. Through the invention, the power consumption of the system can be reduced on the premise of ensuring the system performance.