CN101237288A - GPRS multimedia collection and playing system - Google Patents
GPRS multimedia collection and playing system Download PDFInfo
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- CN101237288A CN101237288A CNA2008100448506A CN200810044850A CN101237288A CN 101237288 A CN101237288 A CN 101237288A CN A2008100448506 A CNA2008100448506 A CN A2008100448506A CN 200810044850 A CN200810044850 A CN 200810044850A CN 101237288 A CN101237288 A CN 101237288A
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Abstract
The invention discloses a GPRS multimedia acquisition playing system. A multimedia acquisition player as an onboard terminal is arranged on a vehicle, can snap photos of the situation inside the vehicle, can control the snapping and playing advertising programs, can realize GPRS communication due to the fact that a GPRS module is self-carried in a terminal; a GPRS multimedia acquisition playing center sends information data to a communication server, the communication server receives the data sent from the GPRS multimedia acquisition playing center and a sub-control center server, the data is forwarded to the multimedia acquisition player through a GPRS network and processed by the multimedia acquisition player; returning information and data of the multimedia acquisition player is transmitted to the communication server through the GPRS network, and forwarded to the GPRS multimedia acquisition playing center and the sub-control center server by the communication server. The GPRS multimedia acquisition playing system can realize the release of wireless advertisements, and provide the functions of motion detection and photo snapping at the same time.
Description
Technical field
The present invention relates to player, especially relate to a kind of GPRS multimedia collection and playing system.
Background technology
In information-intensive society, the rational management of communications and transportation and management are major issues, have occurred a large amount of GPS vehicle scheduling and supervisory control system at present on the market.But the function of these systems mainly is confined to vehicle monitoring, warning processing, vehicle scheduling and information management etc., and operating agency is often found too high, the function singleness of operation cost in actual motion, can not satisfy the growing market demand.
Summary of the invention
The purpose of this invention is to provide a kind of Wireless Advertisement issue that realizes, provide photo to capture the GPRS multimedia collection and playing system of function simultaneously.Compare with traditional GPS car-mounted terminal, the multimedia collection player has the advantage that picture is gathered.Adopt advanced mobile detection technology, when passenger getting on/off, capture photo; Utilize the GPRS channel, can upload the photo of certain candid photograph, and can the real-time grasp shoot photo and upload, more directly perceived to the monitoring of vehicle condition.Play advertising programme and compare with traditional in-car TV, vehicle-carrying DVD, the multimedia collection player has intellectuality, may command, low cost and other advantages.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of GPRS multimedia collection and playing system, comprise multimedia collection player, GPRS multimedia collection playout center, the communication server, branch control central server, wherein the multimedia collection player is installed on the vehicle as car-mounted terminal, can start the candid photograph photo by situation in the car is carried out mobile detection, and can pass through enabling signal (pressing the table modulating signal) control and capture and play advertising programme as taxi, carry the GPRS module in the terminal, can realize GPRS communication; GPRS multimedia collection playout center is with instruction, configuration information and program data, be sent to the communication server, the communication server receives GPRS multimedia collection playout center and divides the control data that central server transmits, these data process Interworking GateWays, the Internet, mobile gateway, be forwarded to the multimedia collection player by GPRS network, handle these data by the multimedia collection player; The multimedia collection player returns replys, information and picture data are delivered to mobile gateway by GPRS network, be sent to the communication server through the Internet, Interworking GateWay again, be forwarded to GPRS multimedia collection playout center and divide the control central server by the communication server.
Described GPRS multimedia collection and playing system also comprises branch control center, and the client can divide the control central server by dividing the remote access of control center, carries out inquiry, download, upload pictures operation.
Described multimedia collection player is made of audio frequency and video processing module, coding and decoding video module, audio frequency D/A module, memory module, power module, GPRS module, wherein
Audio frequency and video processing module: control various peripheral hardware chips, with the GPRS module communication, DSP program in the module realizes mobile detection algorithm, audio/video encoding/decoding algorithm and resolves various data that last module is sent various command, links to each other with the coding and decoding video module by interface;
Coding and decoding video module: when playing, receive the video data of sending from the interface of DSP,, output to liquid crystal with its vision signal that is encoded into simulation; When capturing, receive the analog video signal of two-way camera input, be converted into digital signal, be input to DSP by interface;
Audio frequency D/A module: receive the voice data of sending from the interface of DSP, carry out digital-to-analogue conversion, output to loudspeaker after amplifying by power amplifier;
Memory module: data memory module comprises SDRAM, program FLASH and data FLASH, is the data when being used to store dsp operation, and routine data and the advertising programme data of forever depositing DSP;
Power module: vehicle power is converted to direct current, for all the other modules provide power supply;
The GPRS module: the GPRS module by and mobile gateway between the GPRS channel, set up and to be connected with the TCP of the communication server, realization multimedia collection player is communicated by letter with GPRS multimedia collection playout center.
Comprise just initialization module, candid photograph module, playing module, starting module, note parsing module, link setup authentication module, data resolution module, mobile detection module in the DSP program in the described audio frequency and video processing module, wherein
Initialization module is mainly finished the initial work of register setting, initialization of variable and peripheral hardware chip;
Capture module, realize collection, compressed encoding and the storage of picture
Playing module is responsible for accessing the program of storage, decodes, and realizes the broadcast of program;
Starting module is responsible for the mains switch of GPRS module and is resetted, and makes it in running order;
The note parsing module reads the note of receiving, according to short message content, judges whether log-on message to be kept among the data FLASH into the registration note, and the deletion note;
The link setup authentication module uses the foundation of AT commands for controlling GPRS module to be connected with the TCP of the communication server;
Data resolution module, the picture of candid photograph is stored and uploaded to order, the program receiving data that main parse upper layers is assigned also, and the AT repeat-back that the GPRS module is passed back and the agreement of the equipment and the communication server receive at serial ports interrupts resolving in the flow process
The mobile detection module is resolved the vision signal that collects, and carries out mobile detection.
Multimedia collection player among the present invention is installed on taxi, on the commerial vehicle such as bus and long-distance passenger transportation, the news information that the multimedia collection player can receive in the car operation process and playout center sends, the audio frequency and video advertising programme, be the city image propaganda, communication sphere provides a new carrier, because taxi and bus number are numerous, passengers quantity is big, mobile strong, thereby under this environment, advertise, can play good effect, GPS operator can utilize this equipment, carry out advertising business, collect advertising expenditure to advertising company, can effectively reduce operation cost, be beneficial to further promote the range of application of GPS car-mounted terminal, between GPS operator and advertising company, play the effect of a doulbe-sides' victory.In addition, the multimedia collection player also further provides photo to capture function, has promoted the coefficient of safety of vehicle, and also the management for commerial vehicle provides a kind of new means.Realize data-transformation facility by the GPRS channel between multimedia collection player and the center, make the restriction that no longer is subjected to territorial scope between terminal and the center, network design is more flexible.
Compare with traditional GPS car-mounted terminal, the multimedia collection player has the advantage that picture is gathered.Adopt advanced mobile detection technology, when passenger getting on/off, capture photo; Utilize the GPRS channel, can upload the photo of certain candid photograph, and can the real-time grasp shoot photo and upload, more directly perceived to the monitoring of vehicle condition.
Play advertising programme and compare with traditional in-car TV, vehicle-carrying DVD, the multimedia collection player has intellectuality, may command, low cost and other advantages.Utilize the GPRS channel, can realize point-to-point communication between GPRS multimedia collection playout center and the multimedia collection player, can specify and play certain program, can specify the order of broadcast program, even can specify the period and the region of broadcast program, have very strong flexibility.The download of advertising programme is carried out automatically by GPRS network, need not artificially interfere, and it is very convenient to upgrade advertising programme, has characteristics highly intelligent, automation.
Hyundai electronics and development of Communication Technique provide possibility for the invention of multimedia collection player.The multimedia collection player has adopted a large amount of new techniques, comprises advanced the GPRS communication technology, audio/video encoding/decoding technology, mobile detection technology and DSP real-time signal processing technology.GPRS mobile network's appearance is for the multimedia collection player provides reliable data channel; The development of audio frequency and video compress technique makes the multimedia collection player can store the program data of enough durations and abundant photo, and can guarantee to play and capture quality; The development of DSP technology provides the hardware platform of novel practical for the multimedia collection player.
The invention has the beneficial effects as follows:
1, utilize GPRS network, the GPRS i.e. English of " GPRS " (General Packet RadioService) is called for short, and is a kind of new packet data transmission technique of opening on existing GSM network.With respect to the circuit data load mode of original GSM with dial-up access, GPRS is a packet-switch technology, has advantages such as " always online ", " switching freely ", " high-speed transfer ", and it can promote the reliability of mobile data communication comprehensively.The multimedia collection player adopts the GPRS channel, can transmit configuration order and program data reliably at a high speed, satisfies its practical requirement.
2, Xian Jin mobile detection technology: taxi and bus service time are long, can not all capture all the time, only need capture under specific situation.Can in drawing the line, detect scene with the mobile detection technology and change, just can detect passenger getting on/off in the car door position such as scope delimited.Detect the mobile back that takes place and just can capture, the situation on the car is monitored.
3, Xian Jin audio frequency and video compress technique: the existing audio frequency of advertising programme has video again, and data volume is very big, if do not adopt advanced compress technique, finite storage space can't be stored the program of enough durations on the multimedia collection player.Simultaneously, the broadcast request audio frequency and video of advertising programme have higher playback quality, thereby also require the compression algorithm of audio frequency and video that higher precision will be arranged.The multimedia collection player adopts advanced Voice ﹠ Video compression algorithm, has all reached the requirement of expection on indexs such as compression ratio and playback quality.
4, Xian Jin DSP processing platform: the multimedia collection player needs synchronously playing audio frequency and video data, thereby requires hardware platform to have stronger disposal ability.Traditional single-chip microcomputer disposal ability too a little less than, can not satisfy the requirement that audio frequency and video are handled, thereby the multimedia collection player adopts the ADI advanced person's of company BLACKFIN series BF532DSP as the hardware handles platform, its dominant frequency can reach 400MHz, and abundant Peripheral Interface arranged, can directly link to each other, satisfy the requirement of audio-video frequency playing system with the audio frequency and video chip.
Description of drawings
Fig. 1 is a composition structure chart of the present invention;
Fig. 2 is the circuit structure diagram of multimedia collection player among the present invention;
Fig. 3 is a dsp software main flow chart among the present invention;
Fig. 4 is a sound intermediate frequency D/A module circuit diagram of the present invention;
Fig. 5 is a coding and decoding video module circuit diagram among the present invention;
Fig. 6 is a middle pitch video processing module circuit diagram of the present invention;
Fig. 7 is a memory module circuit diagram among the present invention;
Fig. 8 is power module circuitry figure among the present invention;
Fig. 9 is a GPRS module circuit diagram among the present invention.
Embodiment
See Fig. 1, the multimedia collection player is as car-mounted terminal, be installed on the vehicles such as taxi, bus and long-distance passenger transportation car, can start the candid photograph photo by situation in the car is carried out mobile detection, and can pass through enabling signal (pressing the table modulating signal) control and capture and play advertising programme as taxi, carry the GPRS module in the terminal, can realize GPRS communication; GPRS multimedia collection playout center is sent to the communication server with instruction, configuration information and program data.The communication server receives GPRS multimedia collection playout center and divides the control data that central server transmits, these data process Interworking GateWays, the Internet, mobile gateway, be forwarded to the multimedia collection player by GPRS network, handle these data by the multimedia collection player; The multimedia collection player returns replys, information and picture data are delivered to mobile gateway by GPRS network, be sent to the communication server through the Internet, Interworking GateWay again, be forwarded to GPRS multimedia collection playout center and divide the control central server by the communication server.The client can divide the control central server by dividing the remote access of control center, carries out operations such as inquiry, download, upload pictures.
Among Fig. 2,1: data, address bus and memory control signal; 2: digital video signal; 3: analog video output signal; The 4:UART interface; 5: modular power source; 6: power control signal; 7: digital audio and video signals; 8: amplifier power supply; 9:GPRS; 10: vehicle-mounted DC power supply; 11: lcd power source; 12: the camera power supply; 13: simulated audio signal; 14: the two-way analog video input signal.
Multimedia collection player circuit module comprises audio frequency and video processing, coding and decoding video, audio frequency D/A, storage, power supply and six parts of GPRS module.
The audio frequency and video processing module
As the nucleus module of entire equipment, be used to control various peripheral hardware chips, with the GPRS module communication, realize mobile detection algorithm, audio/video encoding/decoding algorithm and resolve various data, send various command.Vision signal meets the CCIR-656 standard, links to each other with Video Codec by the CCIR-601 interface.
The coding and decoding video module
Major function is to receive the CIR-656 video data of sending from the PPI interface of audio frequency and video processing module when playing, and with its vision signal that is encoded into simulation, outputs to liquid crystal; When capturing, receive the analog video signal of two-way camera input, be converted into the CCIR-656 digital signal, be input to DSP by the PPI interface.
Audio frequency D/A module
Major function is to receive the voice data of sending from the SPORT0 interface of audio frequency and video processing module, carries out digital-to-analogue conversion, outputs to loudspeaker after amplifying by power amplifier.
Memory module
Memory module comprises SDRAM, program FLASH and data FLASH.Major function is the data when being used to store dsp operation, and routine data and the advertising programme data of forever depositing DSP.
Power module
Power supply adopt the DC-DC device vehicle power is converted to+3.3V and+the 4V direct current, for all the other modules provide power supply.
The GPRS module
The GPRS module by and mobile gateway between the GPRS channel, set up and to be connected with the TCP of the communication server, realization multimedia collection player is communicated by letter with GPRS multimedia collection playout center.
See Fig. 3, comprise initialization module in the DSP program in the audio frequency and video processing module, capture module, playing module, starting module, note parsing module, link setup authentication module, data resolution module, mobile detection module, wherein initialization module is mainly finished the initial work of register setting, initialization of variable and peripheral hardware chip; Capture collection, compressed encoding and the storage of module realization picture; Playing module is responsible for accessing the program of storage, decodes, and realizes the broadcast of program; Starting module is responsible for the mains switch of GPRS module and is resetted, and makes it in running order; The note parsing module reads the note of receiving, according to short message content, judges whether log-on message to be kept among the data FLASH into the registration note, and the deletion note; The link setup authentication module uses the foundation of AT commands for controlling GPRS module to be connected with the TCP of the communication server; The picture of candid photograph is stored and uploaded to the order that the main parse upper layers of data resolution module is assigned, program receiving data also.The vision signal that the mobile detection module parses collects is carried out mobile detection, judges whether to start to capture.The AT repeat-back that the GPRS module is passed back and the agreement of the equipment and the communication server receive at serial ports interrupts resolving in the flow process.Program also can judge whether to start and capture and broadcast program according to the enabling signal (pressing the table lamp as taxi) of outside input.
See Fig. 4: the realization of audio frequency D/A modular circuit
Realize circuit as shown in Figure 4, audio frequency D/A chip can adopt the AK4386 of AKM.This chip provides 1 I
2The S interface, 2 road stereophonic signal output interfaces adopt the clock input of 12.288MHz.
1.SPORT0 synchronizing signal: as I
2The channel clock signal of S interface, the LRCK that is input to audio frequency D/A chip manages leg.
2.SPORT0 clock signal: as I
2The data clock signal of S interface, the BICK that is input to audio frequency D/A chip manages leg.
3.SPORT0 transmission signal: as I
2The voiceband data signal of S interface, the SDTI that is input to audio frequency D/A chip manages leg.
4. audio frequency reset signal: the signal of the control audio D/A chip reset that sends for DSP is input to the PDN pipe leg of audio frequency D/A chip.
5.12.288MHz clock signal:, be input to the MCLK pipe leg of audio frequency D/A chip as the master clock of audio frequency D/A chip.
6. simulated audio signal: the simulation output that is audio frequency D/A chip.
Amplify the back outputs to outside audio amplifier from BNC socket audio signal by power amplifier.
See Fig. 5, the realization of coding and decoding video modular circuit
Realize circuit as shown in Figure 5, video coding chip can adopt the SAA7121 of PHILIPS.This chip provides 1 analog video CVBS signal output interface, 18 vision signal digital-to-analogue conversion interface, and digital pattern of the input is " CCIR656-8BIT " pattern, adopts clock input and I of 27MHz
2The C configuration interface; That video decoding chip adopts is the SAA7113 of PHILIPS.This chip provides 4 analog video signal input interfaces, 18 vision signal digital-to-analogue conversion interface, and digital pattern of the input is " CCIR656-8BIT " pattern, adopts clock input and I of 24.576MHz
2The C configuration interface.
1. output to the CCIR-656 vision signal of video coding chip.
2. the CCIR-656 vision signal of video decoding chip output.
3.PPI interface: output CCIR-656 vision signal during broadcast program, input CCIR-656 vision signal when capturing photo.
4.SDA and SCL:I
2The data of C configuration interface and clock signal are received the respective tube leg of SAA7121 and SAA7113 respectively.
5. video coding chip reset signal.
6. video decoding chip reset signal.
7.PPI clock signal is the clock source with the 27MHz crystal oscillator during broadcast program, the LLC pipe leg output signal with SAA7113 when capturing photo is the clock source, is input to the PPI_CLK pipe leg of DSP and the LLC pipe leg of SAA7121.
8.SAA7113 the 27MHz clock signal of LLC pipe leg output, the clock of the CCIR-656 video data when capturing photo.
9. output analog video signal: be the simulation output of SAA7121, output to displaying video image on the outside liquid crystal by the CVBS pipe leg of SAA7121.
10. input analog video signal: two-way altogether is input to AI11 and the AI22 pipe leg of SAA7113 by outside camera.
See Fig. 6, the realization of audio frequency and video processing module circuit
Realize circuit as shown in Figure 6, processor wherein can adopt the ADSP-BF532 of ADI.The DSP program is used AT commands for controlling GPRS module by the UART interface, set up and be connected with the TCP of the communication server, receive instruction, configuration information and the program data of GPRS multimedia collection playout center, the parsing through the DSP program writes program data and configuration information among the data FLASH.
The DSP program is gathered video data from the PPI interface and is carried out mobile detection, carries out photo and capture after determining mobile the generation, and the photo behind the coding is written among the data FLASH; The DSP program is selected corresponding program during broadcast program from data FLASH, it is read and is saved in SDRAM, and decoded audio, video data is sent by SPORT0 and PPI interface respectively.
1.SPORT0 synchronizing signal: by the RFS0 pipe leg output of ADSP-BF532.
2.SPORT0 clock signal: by the TSCLK0 pipe leg output of ADSP-BF532.
3.SPORT0 transmission signal: by the DTOPRI pipe leg output of ADSP-BF532.
4. audio frequency D/A chip reset signal: by the PF2 pipe leg output of ADSP-BF532.
5. power control signal: have four signals, be respectively lcd power source control signal, camera power control signal, amplifier power supply control signal and GPRS modular power source control signal.
6.GPRS module reset signal.
7. video coding chip reset signal.
8. video decoding chip reset signal.
9.SDA and SCL: PF0 and the PF1 pipe leg of receiving ADSP-BF532 respectively.
10.PPI clock: the PPI_CLK pipe leg that is input to ADSP-BF532.
11.8 bit digital vision signal: the PPI0-7 pipe leg that connects ADSP-BF532.
12.16 bit data bus: the bus of ADSP-BF532 access external memory transmission data, the DATA0-15 that receives ADSP-BF532 manages leg.
13.19 bit address bus: ADSP-BF532 sends the bus of address signal to external memory storage, by the ADDR1-19 pipe leg output of ADSP-BF532.
14. the signal of stores synchronized control signal: ADSP-BF532 control external sync memory comprises 7 holding wires, respectively by ADSP-BF532 /SWE ,/SMS ,/SRAS ,/SCAS, SCKE, CLKOUT and the output of SA10 pipe leg.
15. the signal of asynchronous storage control signal: ADSP-BF532 control external asynchronous memory comprises 4 output signal lines and 1 input signal cable, respectively by ADSP-BF532 /AWE ,/AOE ,/AMS0 ,/the leg output of AMS1 pipe and ARDY pipe leg import.
16.TXD send and received signal with the UART of RXD:ADSP-BF532, receive the respective tube leg of GPRS module.
See Fig. 7, the realization of data memory module circuit
Realize that SDRAM can adopt HY57V561620 as shown in Figure 7, capacity is 32MB, is used for preserving data temporarily.That FLASH adopts is TE28F800C3BA and K9F2G08U0M, and capacity is 1MB and 256MB, is respectively applied for permanent prewired program and data.
1.1-16 bit data bus: the respective tube leg that is connected to HY57V561620 and TE28F800C3BA.
2.1-10,12,13,18 and 19 bit address buses: the respective tube leg that is connected to HY57V561620.
3.1-19 bit address bus: the 1-19 position is connected to the respective tube leg of TE28F800C3BA.
4.1-8 bit data bus: the I/O 0-7 pipe leg that is connected to K9F2G08U0M.
5. address, instruction latch signal: 18 bit address holding wires are connected to the ALE pipe leg of the BA0 of HY57V561620 and K9F2G08U0M; 19 bit address holding wires are connected to the BA1 of HY57V561620 and the CLE pipe leg of K9F2G08U0M.
Stores synchronized control signal :/SWE ,/SMS ,/SRAS ,/SCAS, SCKE, CLKOUT and SA10 be connected respectively to the respective tube leg of HY57V561620.
7. asynchronous storage control signal :/AWE ,/AOE is connected respectively to the respective tube leg of TE28F800C3BA and K9F2G08U0M; / AMS0 is connected to the respective tube leg of TE28F800C3BA; / AMS1 is connected to the respective tube leg of K9F2G08U0M.
See Fig. 8, the realization of power module circuitry
Realize that as shown in Figure 8, it is LM2576 that the DC-DC device can adopt model, being used to provides+3.3V and+4V power supply road part work is used.Relay can adopt HRS1H-DC3V, receives the power control signal of audio frequency and video processing section, the switch of control lcd power source, camera power supply and amplifier power supply.
1. vehicle-mounted DC power supply:, be the general supply of whole equipment by the DC power supply of vehicle power by the input of DB-15 socket.
2.+3.3V DC power supply: the working power of host module.Lcd power source control signal: by receiving the control end of relay after the triode driving.
3.+4V DC power supply: the working power of GPRS module.
4. lcd power source: output to the power supply or the low level of liquid crystal by relay output end by the DB-15 socket, be controlled by the lcd power source control signal.
5. camera power supply: output to the power supply or the low level of camera by relay output end by the DB-15 socket, be controlled by the camera power control signal.
6. amplifier power supply: output to the power supply or the low level of power amplifier by relay output end, be controlled by the amplifier power supply control signal.
7. power control signal: have three signals, be respectively lcd power source control signal, camera power control signal and amplifier power supply control signal.
8.GPRS modular power source control signal: the break-make of the working power+4V DC power supply of control GPRS module.
See Fig. 9, the realization of GPRS modular circuit
Realize that the GPRS module can adopt the SIM300C module of SIMCOM as shown in Figure 9, link to each other with DSP by a UART interface that receive the AT instruction of DSP, foundation is connected with the TCP of the communication server, realization equipment is communicated by letter with GPRS multimedia collection playout center.
1.TXD: the UART receiving tube leg that is connected to the SIM300C module.
2.RXD: the UART that is connected to the SIM300C module sends the pipe leg.
3.GPRS module reset signal.
4.+4V DC power supply: the working power of GPRS module is controlled by DSP.
5.SIM card signal: comprise SIM_VDD, SIM_DATA, SIM_CLK, SIM_PRESENSE and five signals of SIM_RST.
The present invention can be installed on the commerial vehicles such as taxi, bus and long-distance passenger transportation.Owing to use onboard, some connector of multimedia collection player all should be considered the function of locking, in order to avoid cable comes off.Its sound intermediate frequency, video socket are used BNC socket, and BNC connector has and prevents to shake the function that comes off.The connector of casing front and back panel and sign can be as follows:
Front panel:
1, status indicator lamp (power supply, operating state) (optional)
2, logo and product type sign
3,1 instrument connection.
Rear board:
1, individual GSM antenna socket
2,1 DB15 socket
3,1 video accessory power outlet (coaxial socket).
4,2 video input sockets (coaxial socket).
5,2 audio frequency accessory power outlets (coaxial socket).
Claims (10)
1, a kind of GPRS multimedia collection and playing system, it is characterized in that: comprise multimedia collection player, GPRS multimedia collection playout center, the communication server, branch control central server, wherein the multimedia collection player is installed on the vehicle as car-mounted terminal, captures photo and plays advertising programme; GPRS multimedia collection playout center is with instruction, configuration information and program data, be sent to the communication server, the communication server receives GPRS multimedia collection playout center and divides the control data that central server transmits, these data process Interworking GateWays, the Internet, mobile gateway, be forwarded to the multimedia collection player by GPRS network, handle these data by the multimedia collection player; The multimedia collection player returns replys, information and picture data are delivered to mobile gateway by GPRS network, be sent to the communication server through the Internet, Interworking GateWay again, be forwarded to GPRS multimedia collection playout center and divide the control central server by the communication server.
2, GPRS multimedia collection and playing system according to claim 1 is characterized in that: also comprise branch control center, the client divides the control central server by dividing the remote access of control center, carries out inquiry, download, upload pictures operation.
3, GPRS multimedia collection and playing system according to claim 1, it is characterized in that: described multimedia collection player is made of audio frequency and video processing module, coding and decoding video module, audio frequency D/A module, memory module, power module, GPRS module, wherein
The audio frequency and video processing module: control various peripheral hardware chips, with the GPRS module communication, realize mobile detection, handle the various data of audio-video signal, last module is sent various command, links to each other with the coding and decoding video module by interface;
Coding and decoding video module: when playing, receive the video data of sending from the interface of audio frequency and video processing module,, output to liquid crystal with its vision signal that is encoded into simulation; When capturing, receive the analog video signal of two-way camera input, be converted into digital signal, be input to the audio frequency and video processing module by interface;
Audio frequency D/A module: receive the voice data of sending from the interface of audio frequency and video processing module, carry out digital-to-analogue conversion, output to loudspeaker after amplifying by power amplifier;
Memory module: data memory module comprises SDRAM, program FLASH and data FLASH, is the data when being used to store the operation of audio frequency and video processing module, and routine data and the advertising programme data of forever depositing the audio frequency and video processing module;
Power module: vehicle power is converted to direct current, for all the other modules provide power supply;
The GPRS module: the GPRS module by and mobile gateway between the GPRS channel, set up and to be connected with the TCP of the communication server, realization multimedia collection player is communicated by letter with GPRS multimedia collection playout center.
4, GPRS multimedia collection and playing system according to claim 3, it is characterized in that: comprise initialization module in the DSP program in the audio frequency and video processing module, capture module, playing module, starting module, note parsing module, link setup authentication module, data resolution module, mobile detection module, wherein
Initialization module is mainly finished the initial work of register setting, initialization of variable and peripheral hardware chip;
Capture module, realize the compressed encoding and the storage of picture;
Playing module is responsible for accessing the program of storage, carries out audio frequency and video and handles, and realizes the broadcast of program;
Starting module is responsible for the mains switch of GPRS module and is resetted, and makes it in running order;
The note parsing module reads the note of receiving, according to short message content, judges whether log-on message to be kept among the data FLASH into the registration note, and the deletion note;
The link setup authentication module uses AT commands for controlling GPRS module to set up and is connected with the TCP of the communication server;
Data resolution module, the picture of candid photograph is stored and uploaded to order, the program receiving data that main parse upper layers is assigned also, and the AT repeat-back that the GPRS module is passed back and the agreement of the equipment and the communication server receive at serial ports interrupts resolving in the flow process;
The mobile detection module is resolved the vision signal that collects, and carries out mobile detection.
5, GPRS multimedia collection and playing system according to claim 3 is characterized in that: that the audio frequency D/A chip in the audio frequency D/A modular circuit adopts is the AK4386 of AKM, and this chip provides 1 I
2The S interface, 2 road stereophonic signal output interfaces adopt the clock input of 12.288MHz.
6, GPRS multimedia collection and playing system according to claim 3, it is characterized in that: that the video coding chip in the coding and decoding video module adopts is the SAA7121 of PHILIPS, this chip provides 1 analog video CVBS signal output interface, 18 vision signal digital-to-analogue conversion interface, the numeral pattern of the input is the CCIR656-8BIT pattern, adopts clock input and I of 27MHz
2The C configuration interface; That the video decoding chip in the coding and decoding video module adopts is the SAA7113 of PHILIPS, this chip provides 4 analog video signal input interfaces, 18 vision signal digital-to-analogue conversion interface, digital pattern of the input is the CCIR656-8BIT pattern, adopts clock input and I of 24.576MHz
2The C configuration interface.
7, GPRS multimedia collection and playing system according to claim 3, it is characterized in that: the ADSP-BF532 of the processor adopting ADI in the audio frequency and video processing module, the DSP program is used AT commands for controlling GPRS module by the UART interface, set up and be connected with the TCP of the communication server, receive instruction, configuration information and the program data of GPRS multimedia collection playout center, parsing through the DSP program writes program data and configuration information among the data FLASH; The DSP program is gathered video data from the PPI interface and is carried out mobile detection, carries out compressed encoding after determining mobile the generation, and the photo behind the coding is written among the data FLASH; The DSP program is selected corresponding program during broadcast program from data FLASH, it is read and is saved in SDRAM, and decoded audio, video data is sent by SPORT0 and PPI interface respectively.
8, GPRS multimedia collection and playing system according to claim 3, it is characterized in that: that memory module SDRAM adopts is HY57V561620, be used for preserving data, that FLASH adopts is TE28F800C3BA and K9F2G08U0M, is respectively applied for permanent prewired program and data temporarily.
9, GPRS multimedia collection and playing system according to claim 3 is characterized in that: that DC-DC device in the power module adopts is LM2576, being used to provides+3.3V and+4V power supply road part work is used; Relay adopts HRS1H-DC3V, receives the power control signal of audio frequency and video processing section, the switch of control lcd power source, camera power supply and amplifier power supply.
10, GPRS multimedia collection and playing system according to claim 3, it is characterized in that: what the GPRS module adopted is the SIM300C module of SIMCOM, link to each other with DSP by a UART interface, receive the AT instruction of DSP, foundation is connected with the TCP of the communication server, and realization equipment is communicated by letter with GPRS multimedia collection playout center.
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| CN2008100448506A CN101237288B (en) | 2008-02-29 | 2008-02-29 | GPRS multimedia collection and playing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588536A (en) * | 2009-06-05 | 2009-11-25 | 叶伟 | Wireless remote voice broadcast control system and device |
| CN102340519A (en) * | 2010-07-19 | 2012-02-01 | 英华达（上海）科技有限公司 | Multimedia network data sharing system |
| CN105786224A (en) * | 2016-03-29 | 2016-07-20 | 电子科技大学 | Universal laser pointer and computer operation method |
-
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588536A (en) * | 2009-06-05 | 2009-11-25 | 叶伟 | Wireless remote voice broadcast control system and device |
| CN102340519A (en) * | 2010-07-19 | 2012-02-01 | 英华达（上海）科技有限公司 | Multimedia network data sharing system |
| CN102340519B (en) * | 2010-07-19 | 2015-03-18 | 英华达（上海）科技有限公司 | Multimedia network data sharing system |
| CN105786224A (en) * | 2016-03-29 | 2016-07-20 | 电子科技大学 | Universal laser pointer and computer operation method |
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| CN101237288B (en) | 2011-06-15 |
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