CN100391148C - System for realizing multi-media play by radio network and its method - Google Patents
System for realizing multi-media play by radio network and its method Download PDFInfo
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- CN100391148C CN100391148C CNB2004100281980A CN200410028198A CN100391148C CN 100391148 C CN100391148 C CN 100391148C CN B2004100281980 A CNB2004100281980 A CN B2004100281980A CN 200410028198 A CN200410028198 A CN 200410028198A CN 100391148 C CN100391148 C CN 100391148C
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Abstract
The present invention relates to a system and a method for playing multimedia through a wireless network. The system comprises a central server and at least one multimedia advertisement terminal connected with the central server through a public wireless communication network, wherein the central server at least comprises one communication unit, one encryption unit, one user check unit and one unit used for managing and controlling the multimedia advertisement terminal. The multimedia advertisement terminal mainly comprises a wireless communication module, an embedded processor, a multimedia playing module, a display device, a hard disk, a loudspeaker and a power supply module used for supplying electricity. The present invention also provides the method for playing multimedia through a wireless network. The system and the device of the present invention has the advantages of safe data transmission, convenient control, convenient upgrade, various playing content, etc.
Description
Technical field
The present invention relates to a kind of system and method thereof that is used for the multimedia of public arena, refer to a kind of system and method thereof that realizes multimedia by wireless network especially.
Background technology
At present, in a lot of public arenas, the building multi-medium information spreading system all is to utilize equipment such as CRT (cathode ray tube) television set, plasma TV, light-emitting diode display, LCD to play advertisement and release news, in broadcast, signal source is then in control centre, display is distributed in different places, is to pass through wired connection between signal source and the display.Will be on display broadcast information, the then good holding wire of cloth, power line in advance.In general, these equipment all are after the building construction is finished, and just install, and can imagine, if the building is fitted up, then must destroy the building structural wiring and carry out rewiring, and time-consuming, effort causes some unnecessary loss.
And China national Department of Intellectual Property has announced that on April 14th, 2004 name is called the patent of invention of " building multi-medium information spreading system ", and it has disclosed an a kind of emission main frame and one or more reception slave of utilizing and come the system of issuing multimedia information.It has adopted wireless mode to come transmitting multimedia information, and part has solved above-mentioned problem, but this kind building multi-medium information spreading system still has following shortcoming:
1. because be to utilize RF (radio frequency) technology to come transmission information between the emission main frame of this multi-medium information spreading system and the reception slave, its information transmitted only is open and close machine and broadcast synchronizing information, and certain distance limit is arranged because radio frequency transmits, so, emission main frame and the distance that receives between the slave have surpassed certain limit, then receive the information that slave can not receive the emission main frame.
2. in this multi-medium information spreading system, each receive slave all with unit independently form exist, or in limited distance, realize that the synchronizing information of other slave multimedia advertising terminals 3 is play and to the control of slave by an emission main frame; Control or Word message issue to receiving slave need by call paging centers, and paging centers calls out and receives slave, utilizes this kind mode to achieve a butt joint and receives the Long-distance Control of slave.But, by paging centers's mode, require information issuing service provider to have paging network or rent paging network, input cost is too high, and the message transmission of paging network is unidirectional, and whether information arrives and can't confirm.Use way of short messages, because the length restriction of note, information, the particularly issue of instant character information have finite capacity.And the time delay of note, the problem of losing exist and can not guarantee information arrive target.So, be the arrival of adopting paging mode or short message mode all can't guarantee information to transmit, this may be fatal for control command.
3. in this multi-medium information spreading system, use the simple control of simple 8 chip microcontroller to system, the increase of system upgrade, function and improvement be difficulty relatively, even does not have the improved necessity of upgrading, often needs directly more exchange device.
4. the audio or video file storage needs to play by the DVD driver in CD or DVD CD, and the replacing of program is upgraded, and must imprint CDs again, to the on-the-spot CD of changing, must expend more manpower and materials by the staff.
Summary of the invention
In order to overcome the deficiency of existing multi-medium information spreading system, and a kind of system and method thereof that realizes multimedia by wireless network be provided, it adopts the networking mode of server/customer end, adopt open tcp/ip communication agreement between central server and the multimedia advertising terminal, it makes central server can set up being connected of safe and convenient with the multimedia advertising terminal, and upgrade maintenance is convenient, the multimedia advertising terminal can be play high-quality movable video information.
The technical solution adopted in the present invention is: a kind of system that realizes multimedia by wireless network, include a central server and at least one the multimedia advertising terminal of utilizing public wireless communication network to be connected with this central server, described central server comprises at least:
A communication unit is used for communicating with the multimedia advertising terminal, can transmit control command data, media stream file data and message data to the multimedia advertising terminal, and receives from multimedia advertising terminal log-on message or return information;
A ciphering unit is used to decipher log-on message, return information that is received and control command data, media stream file data and the message data that encryption sent;
User's verification unit is used for the log-on message of the logging request of the described multimedia advertising terminal of verification, if by verification then allow described multimedia advertising terminal login, and sets up one with it and is connected, otherwise refuse its login;
The unit managing and control the multimedia advertising terminal, it can generate the control command data of multimedia advertising terminal, also editor sends the media stream file data and the message data of terminal to;
The power module that described multimedia advertising terminal mainly includes wireless communication module, flush bonding processor, multimedia playing module, display unit, storage device, loud speaker and is used to power, wherein:
Wireless communication module sends log-on message to central server, connect by public radio communication network and central server, and and central server between carry out transfer of data;
Flush bonding processor will from wireless communication module receive by a certain protocol conversion data carry out format conversion and the deciphering, if the data that receive are orders then carry out this order, if the data that receive are media stream file data or message data then it is transferred to multimedia playing module; And the data that the multimedia advertising terminal will be able to be transferred to central server carry out encrypting behind the protocol conversion, send wireless communication module to;
Multimedia playing module comprises audio/video decoder, plays the media stream file data, the message data that are stored on the storage device; Or media stream file data, the message data that flush bonding processor sends stored in the storage device, or reply the inquiry of central server to the multimedia advertising terminal;
Display unit is used to the media stream file data, the message data that show that multimedia playing module is play.
On flush bonding processor and multimedia audio-video decoder, be connected with FLASH memory and SDRAM memory respectively.
Described multimedia playing module also comprises audio frequency amplifier, video display control unit and via memory interface circuit, audio/video decoder is connected with storage device by via memory interface circuit, a processor and a DSP chip are contained in described multimedia audio-video decoder inside, and it can be decoded and play the media stream file that is stored in the storage device.
Be connected with a dual-port static memory that is used for keeping in the data of transmitting between flush bonding processor and the multimedia audio-video decoder between flush bonding processor and the multimedia audio-video decoder.
Described power module includes the circuit that is used for the 220V external power is carried out filter rectification and voltage stabilizing conversion.
Directly be connected by universal serial bus between flush bonding processor and the wireless communication module, and flush bonding processor is connected by described dual-port static memory with the multimedia audio-video decoder, two groups of absolute addresses of this static memory and data/address bus are connected to the external data/address bus of described flush bonding processor and described audio/video decoder respectively.
Data exchange process between described flush bonding processor and the audio/video decoder is: transmit leg is write data in the static memory on the preposition, reads corresponding data by the recipient from this precalculated position again.
The present invention also provides a kind of method that realizes multimedia by wireless network, it utilizes a central server and at least one the multimedia advertising terminal of utilizing public wireless communication network to be connected with this central server to realize, it is characterized in that comprising the steps:
The wireless communication module of multimedia advertising terminal sends logging request by public wireless communication network to central server;
After central server received the logging request of this multimedia advertising terminal, if the log-on message of this multimedia advertising terminal of verification by verification then allow the login of this multimedia advertising terminal, otherwise was refused its login;
Central server with by the login verification the multimedia advertising terminal connect;
The unit generates or editor need transmit order data, media stream file data or the message data of management and control multimedia advertising terminal in the central server, and, utilize public wireless communication network to send to specific multimedia advertising terminal with the suitable form that transmits of these data transaction one-tenth;
The wireless communication module of this multimedia advertising terminal receives the data that the central server transmission comes, and these data are passed to flush bonding processor by universal serial bus;
Flush bonding processor recovers original form and deciphering with these data that receive, and judge the type of these data, if what receive is the media stream file data, described media stream file data is transferred to the multimedia audio-video decoder, by this multimedia audio-video decoder stores in coupled storage device; If receiving is order, then it is according to the particular content of this order, and control multimedia audio-video decoder is made corresponding action; If what receive is message data, then controls the multimedia audio-video decoder and broadcast or be stored in the storage device in the mode of rolling literal;
The audio/video decoder editor utilizes flush bonding processor format transformation and encryption to the return information of central server, and sends to central server by wireless communication module.
Comprise that further the multimedia advertising terminal receives the forced synchronism order of central server, the step of the time synchronized of maintenance and central server.
Beneficial effect of the present invention is:
1, central server 1 and the networking mode of multimedia advertising terminal room based on server/customer end (Server/Client), adopt open tcp/ip communication agreement to communicate, the tcp/ip communication agreement can guarantee the transmission of each packets of information, can both correctly not have the ground of omission and arrives receiving target.
2, each multimedia advertising terminal, be connected in the network with central control server, has the control of accepting central server at any time, carry out the order of central server, show the real-time Word message that central server sends, carry out file transfer, receive the central server downloaded files, upload the functions such as state of self at any time.To the monitoring of advertisement terminal, can realize control and supervision by the application/management software of operation central server to terminal.
3, the present invention uses microprocessing unit, and on the embedded OS of all application software operation based on a powerful network function, the microprocessing unit operational capability is strong, the increase of system upgrade, function and only improve must software renewal can realize.And, only need can to finish upgrading and upgrade by the control of central server.
4, the storage device (as hard disk or CF card etc.) of the medium of file of the present invention employing, its anti-seismic performance, access speed, memory capacity are all better than CD drive, and cost is suitable even lower.Renewal and increase for program file, utilize the common wireless communication net to send the multimedia advertising terminal to by central server, and store in this storage device, unwanted file can be deleted from storage device, vacating space is preserved alternative document, those actions and do not need personnel to operate to the scene at terminal place.The present invention adopts broadband mobile data transmission, removes Word message, can also transmit the still picture of high definition, literal news is play in real time, transmit the video information of high compression rate, along with the development of public radio communication network, but real-time online is play high-quality movable video information.
Description of drawings
Fig. 1 is the present invention realizes the system of multimedia by wireless network a principle schematic.
Fig. 2 is the block diagram of the present invention by multimedia advertising terminal in the system of wireless network realization multimedia.
Fig. 3 is the present invention realizes the method for multimedia by wireless network a flow chart.
Embodiment
As shown in Figure 1, be the present invention realizes the system of multimedia by wireless network principle schematic.Native system includes a central server 1 and some multimedia advertising terminals 3 are formed, and wherein, the quantity and the position of multimedia advertising terminal 3 are determined on a case-by-case basis, and this multimedia advertising terminal 3 can be installed on the fixing or mobile target.Grid is with the networking mode of server/customer end (Server/Client), central server 1 and client are that the physical connection of multimedia advertising terminal 3 is to utilize the connected mode of public mobile communication network 2 (GSM network, cdma network, wlan network and later 3G network a kind of), and software connects and then adopts open ICP/IP protocol.There is on application management software and the multimedia advertising terminal 3 operation that embedded OS and application software are arranged in operation on the central server 1.
Wherein, central server 1 adopts the general calculation machine webserver that can be connected to the Internet network.Operating system is being installed on this server and is operating in application software on this operating system, the user can press the basic software interface according to the needs of oneself, develops the application software with specific function of oneself.This central server 1 includes a communication unit at least, being used for seeing through public wireless communication network 2 connects with multimedia advertising terminal 3 and communicates, promptly transmit data, receive from multimedia advertising terminal 3 log-on messages or return information to multimedia advertising terminal 3.It also includes user's verification unit, after the wireless communication module 31 of central server 1 receives logging request from multimedia advertising terminal 3, the log-on message that is used for this multimedia advertising terminal 3 of verification, it carries out verification with this log-on message and the information in the user list that is recorded in the central server 1, if by verification then allow login, otherwise refusal login.This central server 1 also comprises a storage device at least, is used to store the media stream file data that need be transferred to multimedia advertising terminal 3, order data, message data etc.; It also includes the unit of a management and control multimedia advertising terminal 3, it can generate the control command to multimedia advertising terminal 3, and editor sends the media stream file and the message file of multimedia advertising terminal 3 to, this control command such as can instruct multimedia advertising terminal 3 by programming requirements broadcast be stored in wherein program (on a time period, the program played in order, the volume of control different time sections), the state of inquiry multimedia advertising terminal 3, force the time synchronized of multimedia advertising terminal 3 and central server 1, and the start of long-distance controlling multimedia advertisement terminal 3/shutdown action, control the different program of different terminal plays etc.
As shown in Figure 2, be the block diagram of the present invention by multimedia advertising terminal 3 in the system of wireless network realization multimedia.This multimedia advertising terminal 3 mainly includes wireless communication module 31, flush bonding processor 32, multimedia playing module 33, display unit 34, hard disk 35, loud speaker 36 and power module 37.
Wherein, wireless communication module 31 is responsible for being wirelessly connected in the public Internet network by public radio communication network, connect with the central server 1 that is linked in the public Internet network equally, set up central server 1 and multimedia advertising terminal 3 physical channel of transfer of data each other.Because public radio communication network can adopt all multi-form, as GSM network, cdma network and later 3G network etc., so this wireless communication module 31 can adopt corresponding module, be used for the G18 module of GSM-GPRS network, the CDMA-1X module that is used for cdma network or 3G data communication module etc. as Motolora company, Motorola G18 possesses the GPRS mode data transmittability of second up to 115K/ except that general mobile voice call function.
Be connected with FLASH memory and SDRAM memory on flush bonding processor 32 and multimedia audio-video decoder 330 respectively, wherein, the FLASH memory is used for stored program, data.The temporary storage of SDRAM during as 330 operations of flush bonding processor 32 and multimedia audio-video decoder is used to deposit transient program code, intermediate data etc.In the present embodiment, the FLASH memory adopts 16 29LV160; SDRAM adopts S3C4510B01.
Connect the SRAM (static memory) with a dual-port between flush bonding processor 32 and multimedia audio-video decoder 330, it is used for keeping in the data of being transmitted between flush bonding processor 32 and the multimedia audio-video decoder 330.In the present embodiment, this SRAM adopts the YS131 of 2K * 8Bit.
RS232 universal serial bus by standard between flush bonding processor 32 and the wireless communication module 31 directly is connected, and flush bonding processor 32 is connected by a slice dual-port SRAM (static memory) chip with multimedia audio-video decoder 330, it is two groups of absolute addresses and the data/address bus (A/D bus) that utilizes sram chip, is connected to the external data/address bus of flush bonding processor 32 and audio/video decoder 330 respectively.Data exchange process between flush bonding processor 32 and the audio/video decoder is: transmit leg is write data among the SRAM on the preposition, reads corresponding data by the recipient from this precalculated position again.
In this multimedia advertising terminal 3, in flush bonding processor 32, be integrated with system and Control Software, in multimedia playing module 33, be integrated with multimedia software and document management software.Wherein, system and Control Software have comprised embedded OS software, ICP/IP protocol stack software, point-to-point communication transmitting software, file transfer protocol (FTP) software, telnet, Promgramming Play Control software, system software etc.Utilizing multimedia software can realize various audio/video bitstreams are decoded plays and functions such as video demonstration, Audio Processing.Utilize document management software can realize comprising such as functions such as hard drive, hard disk management, file organization, file directory, file storage and transmission.
As shown in Figure 3, be the present invention realizes the method for multimedia by wireless network main flow chart.
One, the step of at first logining:
Two, set up the step of connecting of central server 1 and multimedia advertising terminal 3:
After multimedia advertising terminal 3 is successfully logined central server 1, central server 1 is according to the IP address of multimedia advertising terminal 3, using ICP/IP protocol to set up one with multimedia advertising terminal 3 is connected, after connecting, but mutual communication between central server 1 and the multimedia advertising terminal 3, transceive data.
Three, central server 1 sends the step of data to multimedia advertising terminal 3:
Existing mobile communication network can satisfy information such as the image, literal news of forms such as real-time Transmission JPEG, for the bigger stream of audio-visual data of some bandwidth requirements, then adopt the mode that play the back of downloading, because the requirement that advertisement is play does not need real-time Transmission, and transmitting real-time literal news, the bandwidth foot is satisfied.Along with the development of public radio communication network (as following 3G or 4G net open-minded), bandwidth can satisfy the real-time Transmission stream of audio-visual data, but real-time online is play high-quality movable video information.
The information (media stream file data, message data, order data) that the device editor of management and control multimedia advertising terminal 3 need transmit in the central server 1, and with the suitable form that transmits of this information translation one-tenth, and mat public wireless communication network 2 sends to the specific multimedia advertising terminal 3 of passing through check, and this specific multimedia advertising terminal can be one or more.
Four, multimedia advertising terminal 3 receives the step of data:
The wireless communication module 31 of multimedia advertising terminal 3 is passed to flush bonding processor 32 with these data by the RS232 bus after receiving the next data of central server 1 transmission; Flush bonding processor 32 is with this data decryption that receives and recover original form, and judges the type of these data, has defined three kinds of data types in the present embodiment, and one is a file data, i.e. the media stream file data; It two is an order data, i.e. the control command and the querying command of 1 pair of this multimedia advertising terminal 3 of central server; The message data of another real-time news messages.If what receive is the media stream file data, then this media stream file data is transferred to multimedia audio-video decoder 330, store in the hard disk 35 by this multimedia audio-video decoder 330; If what receive is order data, as playing programs arrangement instruction, then it is according to the particular content of order, and control multimedia audio-video decoder 330 is made corresponding action, for example plays the program that is stored in the hard disk 35; If what receive is message data, then controls multimedia audio-video decoder 330 and broadcast or be stored in the hard disk 35 in the mode of rolling literal.
The return information of 330 pairs of central servers 1 of audio/video decoder, can send central server 1 to according to above-mentioned reversible process, be the return informations of audio/video decoder 330 editors, utilize flush bonding processor 32 format transformations, and send by wireless communication module 31 to central server 1.
Five, the step of central server 1 and multimedia advertising terminal 3 time synchronized:
In each multimedia advertising terminal 3, all carry out the real-time clock management, can receive the forced synchronism order of central server 1, keep time synchronized with central server 1.
The present invention is except the information issue that is applied to stationary applica-tions, can also be applied to be on the mobile occasion, as releasing news on the vehicle car that is in mobile status at the passenger traffic bus of traffic between city bus vehicle, railcar, city, rail vehicles for transporting passengers etc.
Compared with prior art, the present invention has following beneficial effect:
1, among the present invention, 3 at central server 1 and multimedia advertising terminal are based on server/customer end (Server/Client) networking mode adopts open tcp/ip communication agreement to communicate; TCP/IP Communication protocol can guarantee the transmission of each packets of information, can both correctly not have the ground of omission and arrives receiving target.
2, each multimedia advertising terminal 3 is connected in the network tool with central control server 1 At any time the control of accepting central server 1 is arranged, carry out the order of central server 1, show central service The real-time Word message that device 1 sends carries out file transfer, receives the file that central server 1 is downloaded, At any time upload the functions such as state of self. To the monitoring of advertisement terminal, can be by operation with server Application/management software is realized the control ﹠ monitor to terminal.
3, the present invention uses 32 Embedded RISC microprocessing units, and all application software operations are based on one On the embedded OS of individual powerful network function, the microprocessing unit operational capability is strong, system upgrade, The increase of function and only improve must software renewal can realize. And, only need by central server 1 Control can finish upgrading and upgrade.
4, the storage device (such as hard disk, CF card etc.) of the medium of file of the present invention employing, its antidetonation Performance, access speed, memory capacity are all better than CD drive, and cost is suitable even lower. Right In renewal and the increase of program file, utilize the common wireless communication net to send to by central server 1 The multimedia advertising terminal, and store in this storage device, unwanted file can be from this storage device In delete, vacating space is preserved alternative document, those actions and do not need personnel to arrive the terminal place The scene operates. The present invention adopts the broadband mobile transfer of data, except Word message, can also transmit height Still picture clearly, text news is play in real time, transmits the video information of high compression rate, along with public The development of cordless communication network, but real-time online is play high-quality movable video information.
Claims (9)
1. the system by wireless network realization multimedia includes a central server and at least one the multimedia advertising terminal of utilizing public wireless communication network to be connected with this central server, it is characterized in that:
Described central server comprises at least:
A communication unit is used for communicating with the multimedia advertising terminal, can transmit control command data, media stream file data and message data to the multimedia advertising terminal, and receives from multimedia advertising terminal log-on message or return information;
A ciphering unit is used to decipher log-on message, return information that is received and control command data, media stream file data and the message data that encryption sent;
User's verification unit is used for the log-on message of the logging request of the described multimedia advertising terminal of verification, if by verification then allow described multimedia advertising terminal login, and sets up one with it and is connected, otherwise refuse its login;
The unit managing and control the multimedia advertising terminal, it can generate the control command data of multimedia advertising terminal, also editor will send the media stream file data and the message data of terminal to;
The power module that described multimedia advertising terminal mainly includes wireless communication module, flush bonding processor, multimedia playing module, display unit, storage device, loud speaker and is used to power, wherein:
Wireless communication module sends log-on message to central server, connect by public radio communication network and central server, and and central server between carry out transfer of data;
Flush bonding processor will from wireless communication module receive by a certain protocol conversion data carry out format conversion and the deciphering, if the data that receive are orders then carry out this order, if the data that receive are media stream file data or message data then it is transferred to multimedia playing module; And the data that the multimedia advertising terminal will be able to be transferred to central server carry out encrypting behind the protocol conversion, send wireless communication module to;
Multimedia playing module comprises audio/video decoder, and described audio/video decoder is connected with described storage device, plays the media stream file data, the message data that are stored on the storage device; Or media stream file data, the message data that flush bonding processor sends stored in the storage device, or reply the inquiry of central server to the multimedia advertising terminal;
Display unit is used to the media stream file data, the message data that show that multimedia playing module is play.
2. the system by wireless network realization multimedia as claimed in claim 1 is characterized in that: be connected with FLASH memory and SDRAM memory respectively on flush bonding processor and multimedia audio-video decoder.
3. the system that realizes multimedia by wireless network as claimed in claim 2, it is characterized in that: described multimedia playing module also comprises audio frequency amplifier, video display control unit and via memory interface circuit, described audio/video decoder is connected with storage device by via memory interface circuit, a processor and a DSP chip are contained in described multimedia audio-video decoder inside, and it can be decoded and play the media stream file that is stored in the storage device.
4. the system by wireless network realization multimedia as claimed in claim 3 is characterized in that: be connected with a dual-port static memory that is used for keeping in the data of transmitting between flush bonding processor and the multimedia audio-video decoder between flush bonding processor and the multimedia audio-video decoder.
5. the system by wireless network realization multimedia as claimed in claim 4, it is characterized in that: described power module includes the circuit that is used for the 220V external power is carried out filter rectification and voltage stabilizing conversion.
6. the system that realizes multimedia by wireless network as claimed in claim 4, it is characterized in that: directly be connected by universal serial bus between flush bonding processor and the wireless communication module, and flush bonding processor is connected by described dual-port static memory with the multimedia audio-video decoder, two groups of absolute addresses of this static memory and data/address bus are connected to the external data/address bus of described flush bonding processor and described audio/video decoder respectively.
7. the system by wireless network realization multimedia as claimed in claim 1 is characterized in that: described control command is play the start/shutdown of the program that is stored in wherein, the state of inquiring about the multimedia advertising terminal, the time synchronized of forcing multimedia advertising terminal and central server, long-distance controlling multimedia advertisement terminal or the volume of control multimedia advertising terminal for order multimedia advertising terminal by the programming requirement.
8. realize the method for multimedia by wireless network for one kind, it utilizes a central server and at least one the multimedia advertising terminal of utilizing public wireless communication network to be connected with this central server to realize, it is characterized in that comprising the steps:
The wireless communication module of multimedia advertising terminal sends logging request by public wireless communication network to central server;
After central server received the logging request of this multimedia advertising terminal, if the log-on message of this multimedia advertising terminal of verification by verification then allow the login of this multimedia advertising terminal, otherwise was refused its login;
Central server with by the login verification the multimedia advertising terminal connect;
The unit generates or editor need transmit order data, media stream file data or the message data of management and control multimedia advertising terminal in the central server, and, utilize public wireless communication network to send to specific multimedia advertising terminal with the suitable form that transmits of these data transaction one-tenth;
The wireless communication module of this multimedia advertising terminal receives the data that the central server transmission comes, and these data are passed to flush bonding processor by universal serial bus;
Flush bonding processor recovers original form and deciphering with these data that receive, and judge the type of these data, if what receive is the media stream file data, described media stream file data is transferred to the multimedia audio-video decoder, by this multimedia audio-video decoder stores in coupled storage device; If receiving is order data, then it is according to the particular content of this order, and control multimedia audio-video decoder is made corresponding action; If what receive is message data, then controls the multimedia audio-video decoder and broadcast in the mode of rolling literal or it is stored in the storage device;
The audio/video decoder editor utilizes flush bonding processor format transformation and encryption to the return information of central server, and sends to central server by wireless communication module.
9. the method by wireless network realization multimedia as claimed in claim 8 is characterized in that: comprise that further the multimedia advertising terminal receives the forced synchronism order of central server, the step of the time synchronized of maintenance and central server.
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| CNB2004100281980A CN100391148C (en) | 2004-07-23 | 2004-07-23 | System for realizing multi-media play by radio network and its method |
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Address after: 518038, Guangdong, Shenzhen province Futian District Bagua Road, Peng village, 4, 805 Patentee after: Zhao Zhiyong Address before: 518038 Guangdong city of Shenzhen province Jinhu Road 1, Silver Lake Silver Court 1A Patentee before: Zhao Zhiyong |