CN201700004U - GPRS-based vehicular voice data real-time transmission device - Google Patents
GPRS-based vehicular voice data real-time transmission device Download PDFInfo
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- CN201700004U CN201700004U CN2010202458914U CN201020245891U CN201700004U CN 201700004 U CN201700004 U CN 201700004U CN 2010202458914 U CN2010202458914 U CN 2010202458914U CN 201020245891 U CN201020245891 U CN 201020245891U CN 201700004 U CN201700004 U CN 201700004U
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Abstract
The utility model discloses a GPRS-based vehicular voice data real-time transmission device, which comprises a vehicular terminal and a server. The vehicular terminal includes a single chip microcomputer system, a loudspeaker, a pickup, a data storage, a GPRS module and a GPS positioning module, wherein the loudspeaker, the pickup, the data storage, the GPRS module and the PGS positioning module are respectively connected to the single chip microcomputer system, and the vehicular terminal and the server realize data transmission through a GPRS network. The GPRS-based vehicular voice data real-time transmission device substantially solves the problems of narrow bandwidth, slow transmission rate, unstable transmission and the like of the GPRS network, and accordingly realizes real-time transmission function of voice and relevant data on the GPRS network.
Description
Technical field
The utility model relates to a kind of voice data transmission device, is specifically related to a kind of vehicle voice data real-time Transmission device based on GPRS.
Background technology
VoIP(Voice over Internet Protocol) is exactly with simulated sound signal (Voice) digitlization in brief, on IP data network (IP Network), does real-time transmission with the form of data packet (Data Packet).Voip technology is to realize the voice communication technology of " point-to-point " and " putting multiple spot ", is one of most critical technology in PTT (Push-to-Talk) business.The professional half-duplex operation mode that adopts of PTT promptly has only a people to talk, so that colony exchanges at one time, the calling party is as long as just can initiate conversation to a people or lineup by a button, need not dial or wait for the other side's off-hook, the phone demand working, and set up phone group rapidly.
Realize the PTT business at the radio communication public network, technical vital point and key point are the problems that must solve mouth-to-ear delay, cause that the most important reason of mouth-to-ear delay is a compress speech, the processing of coding and packet.The theoretical bandwidth of general packet radio service gprs is 14.4KBpS, but the factor affecting that actual data transfer rate is supported by network code mode and terminal only is about 8KBpS, and it is quite difficult carrying out voice data transmission in this case.Therefore, need find a kind of vehicle voice data real-time Transmission device that can avoid the GPRS of the problems referred to above generation.
The utility model content
By Given this, the purpose of this utility model provides a kind of vehicle voice data real-time Transmission side device based on GPRS, fundamentally solved the narrow bandwidth of GPRS network own, transmission rate is slow, transmit problems such as instability, thereby on GPRS network, realized the real-time Transmission function of voice and related data.
To achieve these goals, the utility model is by the following technical solutions:
A kind of vehicle voice data real-time Transmission device based on GPRS comprises car-mounted terminal and server, wherein, described car-mounted terminal comprises Single Chip Microcomputer (SCM) system, loud speaker, pick-up, data storage, GPRS module and GPS locating module, described loud speaker, pick-up, data storage, GPRS module and GPS locating module are connected respectively on the Single Chip Microcomputer (SCM) system, transmit data by GPRS network between described car-mounted terminal and the server.
Further, described car-mounted terminal also comprises the LCD display module, and described LCD display module is connected with Single Chip Microcomputer (SCM) system.
Further, described Single Chip Microcomputer (SCM) system comprises dsp processor and MCU core processor,
The beneficial effects of the utility model are:
The utility model is mainly used in the professional user colony of often flowing in China, as management of long-distance logistics vehicles etc., between these car-mounted terminals and the server and the mode that exchanges between car-mounted terminal and the car-mounted terminal also be in stage of mutual transmission note at present, and server often needs in real time and bulky information for these mobile subscribers' management and the information interaction between the car-mounted terminal, and this has just surpassed the scope of sending short messages mutually.The utility model has been realized effectively utilizing GPRS network targetedly in the territorial scope that wireless network covers, guarantee between server and the car-mounted terminal and smooth conversation between car-mounted terminal and the car-mounted terminal, simultaneously because the communications protocol in this equipment adopts proprietary protocol fully, can adjust encryption level according to the conversation demand, guarantee the fail safe of voice data transmission.
The utility model adopts is 5.3K compression/decompression algorithm G.723, has solved the problem of compress speech and mouth-to-ear delay.The bandwidth 5.3K of algorithm own, through the packing of UDP message, actual operation bandwidth can guarantee in 8K.Because the bandwidth of GPRS can be along with different running environment generation conversion, actual bandwidth may reach about 12K through test is minimum, and the bandwidth actual motion of GPRS is between the 12K-40K, in the city, can guarantee higher bandwidth under the reasonable situation of running environment, and also can implement in the out-of-the-way location of 12K left and right sides bandwidth.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by specifically noted structure in following specification or the accompanying drawing.
Description of drawings
Fig. 1 is a system block diagram of the present utility model;
Fig. 2 is the flow chart of the utility model voice signal receiving course;
Fig. 3 is the flow chart of the utility model voice signal playing process;
Fig. 4 is a MCU core processor expanded circuit schematic diagram;
Fig. 5 is MCU core processor and LCD display module interface circuit figure;
Fig. 6 is GPS locating module interface principle figure.
Embodiment
As shown in Figure 1, the utility model comprises car-mounted terminal and server, transmits data by GPRS network between car-mounted terminal and the server; Car-mounted terminal comprises Single Chip Microcomputer (SCM) system, loud speaker, pick-up, data storage, the LCD display module, GPRS module and GPS locating module, loud speaker, pick-up, data storage, the LCD display module, GPRS module and GPS locating module are connected respectively on the Single Chip Microcomputer (SCM) system; Single Chip Microcomputer (SCM) system comprises dsp processor and MCU core processor
The utility model can be realized between the car-mounted terminal, the speech data real-time Transmission between car-mounted terminal and the server.Server can also adopt the broadcast type talking mode, realizes the voice data transmission of point-to-multipoint, realizes the broadcast type notice of server to a plurality of car-mounted terminals, and this mode driver can only answer, and can not send speech data.Sending voice signal with car-mounted terminal to server is example, and workflow of the present utility model is:
As shown in Figure 2, voice signal receiving course: system initialization, pick-up typing voice signal by car-mounted terminal, extract the voice signal of pick-up typing then, after in dsp processor, carrying out the A/D conversion and G.723 encoding, form UDP datagram, be transferred on the MCU core processor through parallel data grabbing card, the MCU core processor sends to UDP datagram on the server by GPRS network;
As shown in Figure 3, the voice signal playing process: server sends to buffering area with UDP datagram, G.723 decode and D/A conversion after, by the loudspeaker plays on the server.
As Fig. 4, Fig. 5 and shown in Figure 6, the Single Chip Microcomputer (SCM) system of car-mounted terminal comprises dsp processor and MCU core processor, be provided with encryption chip between dsp processor and the MCU core processor, the MCU core processor adopts 8 single-chip microcomputers, audio coding/decoding adopts the DSP treatment technology, employing be 5.3K compression/decompression algorithm G.723, the bandwidth 5.3K of algorithm own, through the packing of UDP message, actual operation bandwidth can guarantee in 8K.Because the bandwidth of GPRS can be along with different running environment generation conversion, actual bandwidth may reach about 12K through test is minimum, and the bandwidth actual motion of GPRS is between the 12K-40K, in the city, can guarantee higher bandwidth under the reasonable situation of running environment, and in the out-of-the-way location of 12K left and right sides bandwidth, the utility model also can normally be realized.
After system powered on, the MCU core processor carried out initialization process to several modular circuits on every side, and these several modular circuits comprise:
GPS locating module: the real-time positioning information that is used to obtain this terminal; The GPS locating module outputs to external PDA by level conversion, can do digital map navigation;
GPRS module: be used for realizing carrying out data passes by wireless network and server;
Dsp processor: be used for the processing of voice signal, comprise that real-time decompress(ion) from the Real Time Compression of pick-up voice signal and packed data contracts to be sent to the work of loudspeaker plays two parts;
LCD display module: wherein comprise keyboard, be used for the written communication between car-mounted terminal and the server.
After initialization finished, the MCU core processor began regularly to monitor the state variation of above-mentioned several modules.Can be stored in the data storage through dsp processor and MCU core processor data processed.When the GPRS module receives request from server by wireless network, then the MCU core processor is according to the different handling process of request beginning:
If the inquiry Location Request, then MCU core processor monitoring GPS module obtains locating information via satellite, sends the present locating information of car-mounted terminal by the GPRS module to server then.Realize the mobile positioning function of server, i.e. positional information and other state information that server can the real time monitoring car-mounted terminal for car-mounted terminal.
If from the information indicating request of server, then the MCU core processor will be presented at from the information of server on the LCD by the LCD display module, the keypad information that also the LCD module is connected sends to server by the GPRS module simultaneously, realizes the information interchange of being undertaken by literal between car-mounted terminal and the server.
If call request, then start the DSP module and begin the processing of compress speech and decompression and the A/D conversion and the D/A conversion of audio signal, send and receive speech data by the GPRS module, the transmission of the ip voice data that realize by wireless network between realization car-mounted terminal and the server, i.e. intercommunication formula conversation.
Claims (3)
1. vehicle voice data real-time Transmission device based on GPRS, comprise car-mounted terminal and server, it is characterized in that: described car-mounted terminal comprises Single Chip Microcomputer (SCM) system, loud speaker, pick-up, data storage, GPRS module and GPS locating module, described loud speaker, pick-up, data storage, GPRS module and GPS locating module are connected respectively on the Single Chip Microcomputer (SCM) system, transmit data by GPRS network between described car-mounted terminal and the server.
2. the vehicle voice data real-time Transmission device based on GPRS according to claim 1, it is characterized in that: described car-mounted terminal also comprises the LCD display module, described LCD display module is connected with Single Chip Microcomputer (SCM) system.
3. the vehicle voice data real-time Transmission device based on GPRS according to claim 1 and 2, it is characterized in that: described Single Chip Microcomputer (SCM) system comprises dsp processor and MCU core processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202458914U CN201700004U (en) | 2010-07-02 | 2010-07-02 | GPRS-based vehicular voice data real-time transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202458914U CN201700004U (en) | 2010-07-02 | 2010-07-02 | GPRS-based vehicular voice data real-time transmission device |
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| Publication Number | Publication Date |
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| CN201700004U true CN201700004U (en) | 2011-01-05 |
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| CN2010202458914U Expired - Lifetime CN201700004U (en) | 2010-07-02 | 2010-07-02 | GPRS-based vehicular voice data real-time transmission device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428285A (en) * | 2013-08-07 | 2013-12-04 | 合肥迈腾信息科技有限公司 | secure and stable vehicle-carried cloud-technology network communicating device and method |
| CN103428286A (en) * | 2013-08-07 | 2013-12-04 | 合肥迈腾信息科技有限公司 | Cloud technology based on-board network communication terminal |
| CN104504778A (en) * | 2014-12-25 | 2015-04-08 | 深圳市华宝电子科技有限公司 | Communicating method and communication device based on travelling data recorder |
| CN105227652A (en) * | 2015-09-24 | 2016-01-06 | 上海车音网络科技有限公司 | A kind of VCM Vehicle Condition Monitoring method, Apparatus and system |
| CN109269551A (en) * | 2017-07-17 | 2019-01-25 | 东北林业大学 | For the information real-time acquisition system in Cold Chain Logistics |
-
2010
- 2010-07-02 CN CN2010202458914U patent/CN201700004U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428285A (en) * | 2013-08-07 | 2013-12-04 | 合肥迈腾信息科技有限公司 | secure and stable vehicle-carried cloud-technology network communicating device and method |
| CN103428286A (en) * | 2013-08-07 | 2013-12-04 | 合肥迈腾信息科技有限公司 | Cloud technology based on-board network communication terminal |
| CN104504778A (en) * | 2014-12-25 | 2015-04-08 | 深圳市华宝电子科技有限公司 | Communicating method and communication device based on travelling data recorder |
| CN105227652A (en) * | 2015-09-24 | 2016-01-06 | 上海车音网络科技有限公司 | A kind of VCM Vehicle Condition Monitoring method, Apparatus and system |
| CN105227652B (en) * | 2015-09-24 | 2020-02-07 | 车音智能科技有限公司 | Vehicle condition monitoring method, device and system |
| CN109269551A (en) * | 2017-07-17 | 2019-01-25 | 东北林业大学 | For the information real-time acquisition system in Cold Chain Logistics |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |
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| CX01 | Expiry of patent term |