CN2792059Y - Mobile autio-video transmission system - Google Patents
Mobile autio-video transmission system Download PDFInfo
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- CN2792059Y CN2792059Y CN 200520017897 CN200520017897U CN2792059Y CN 2792059 Y CN2792059 Y CN 2792059Y CN 200520017897 CN200520017897 CN 200520017897 CN 200520017897 U CN200520017897 U CN 200520017897U CN 2792059 Y CN2792059 Y CN 2792059Y
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Abstract
The utility model relates to a mobile video-audio transmission system. The utility model is provided with a video-audio signal sending end and a video-audio signal receiving end which are connected with a mobile communication network platform, wherein the video-audio signal sending end is provided with a computer digital video-audio compression device which is provided with an analog video-audio signal input end and a communication port output end; the video-audio signal receiving end is provided with a computer digital video-audio decompression device which is provided with a communication port input end and a decompression video-audio signal output end, and at least one of the video-audio signal sending end and the video-audio signal receiving end is a mobile video-audio terminal. The utility model is characterized in that the utility model is provided with at least one mobile video-audio terminal, and the computer communication port of the computer digital video-audio compression device or decompression device is respectively connected with a communication port extension device which is provided with at least two extension communication ports which are respectively connected with wireless communication modules. The utility model binds a plurality of wireless transmission modules to increase bandwidth; in this way, the data transmission rate can be increased and the image quality of transmission video frequency is improved.
Description
Technical field
The utility model belongs to a kind of video/audio signal transmitting device, the particularly wireless audio transmission device of looking.
Background technology
Wireless data transmission has become the focus that industry is paid close attention to since 2000, in the past few years, each manufacturer sets foot in one after another, and wireless product technology and scheme are used widely.And for the security protection industry, the meaning of wireless video transmission is more great, because he will become a new opportunity of the enterprise that is engaged in video transmission, also will be a great change of video transmission industry.The wireless video transmission is that the wireless network development one of is used so far the most widely, under normal conditions, control point and CCC's apart from each other and position disperse, not only cost is very high to utilize the mode of legacy network wiring, and in case when running into obstacle such as mountain range, river, cable network is felt simply helpless especially, and expandability, very flexible, in case will increase or reduce monitored point, will bring new construction period.At this moment, the wireless network incomparable advantage has just embodied, and simultaneously, this wireless video transmission requires nature than higher for network environment, and the remote-wireless image transmission technology that uses in the present domestic security protection mainly contains microwave transmission, UNICOM or mobile cell phone network and transmits two kinds in image.
The advantage of microwave transmission is a high bandwidth, can transmit high definition high-quality video image, and at present domestic have a lot of equipment based on microwave transmission acceptance available; Shortcoming is a limited coverage area, for transmission image on a large scale, also need set up wireless base station and antenna, disposable input and maintenance cost are big. and the penetrability missionary society of microwave itself is subjected to building and blocks, and microwave absorbs by rainwater easily, is subjected to the interference of electronic equipment easily.
The unit/terminal mobile network transmits and is based on UNICOM or mobile cell phone network, so wide coverage, image can be transmitted in the mobile phone place that can lead in theory, use simple, do not need to set up wireless base station and antenna, disposable less investment only needs a wireless modem just passable, need not network operation, at present domestic have a lot of GSM/GPRS and CDMA cat to select for the user; Its shortcoming is a low bandwidth, can not transmit high-quality video image, and actual use is gone up the CDMA upstream rate and had only 30 ~ 60k bps, and the GSM/GPRS network also will hang down.QCIF image or timing after per second under the so low bandwidth can only transmit 1 frame or the compression of a few frame transmit the jpg picture.
Summary of the invention
The technical problems to be solved in the utility model is to overcome low bandwidth, the slow-footed shortcoming that existing mobile network's transmission video signal exists, and a kind of mobile audio transmission system of looking of high quality video image fast is provided.
The technical scheme that addresses the above problem is: the utility model is provided with video/audio signal transmitting terminal and the video/audio signal receiving terminal that connects by the mobile communications network platform, transmitting terminal is provided with computer digit and looks the audio compression device, this device is provided with simulation video/audio signal input and PORT COM output, receiving terminal is provided with computer digit and looks the audio decompression device, this device is provided with PORT COM input and decompress(ion) video/audio signal output, it is mobile video and audio terminal that described video/audio signal transmitting terminal and receiving terminal have a side at least, it is characterized in that: the mobile video and audio terminal that has a side at least, the computer PORT COM of its digital video-audio compression or decompression device is connected to the PORT COM expanding unit, and this PORT COM expanding unit is provided with and is no less than two expansion PORT COM that are connected with wireless communication module respectively.
Described mobile video and audio terminal can be GPRS or CDMA or GSM and in the future 3G network terminal soon.
Described PORT COM can be that USB mouth, RS232 mouth or other can be used for the port of communication.
Operation principle of the present utility model is: the simulation video/audio signal that transmitting terminal compression of digital video device will be imported is compressed into the digital video-audio signal, and according to the Streaming Media transmission control protocol, with software this digital video frequency flow is resolved into two or more parcels in real time, there is its unique sequence number in each packet header, parcel after then these being decomposed is transferred to receiving terminal by the mobile communications network platform, after receiving terminal receives the digital video signal parcel of corresponding sequence number, according to the stream of the sequence number of client Streaming Media transmission control protocol and each packet synthetic video again, again through digital video decompression device output decompress(ion) video/audio signal, in above-mentioned data transmission procedure, when the two or more Packets that are broken down into flow through be the expansion PORT COM of computer of mobile video and audio terminal the time, the PORT COM quantity of expansion is to equate with the data packet number that is decomposed, so each parcel is assigned to the expansion PORT COM that is connected to wireless communication module of each correspondence respectively by computer software, form two or more data transmission stream.
The utility model is suitable for looks the audio frequency transmitting terminal and receiving terminal has following three kinds of situations:
1, transmitting terminal is mobile video and audio terminal, its computer PORT COM is provided with the expansion PORT COM, receiving terminal is fixing (referring to Fig. 1) of receiving terminal, its course of work is: the simulation video/audio signal that transmitting terminal compression of digital video device will be imported is compressed into the digital video-audio signal, and according to the Streaming Media transmission control protocol, with software this digital video frequency flow is resolved into two or more parcels in real time, there is its unique sequence number in each packet header, parcel after by software these being decomposed then sends (corresponding one an of parcel is expanded PORT COM and wireless communication module) by the expansion PORT COM and the wireless communication module of correspondence respectively, be transferred to receiving terminal through the mobile communications network platform, like this, the transmission data just form two or more transport stream (the bar number of transport stream should be corresponding with the wireless communication module quantity after the expansion), (fixedly receiving terminal special line that can provide by the radio communication service merchant or the INTERNET the Internet that provides inserted after fixedly receiving terminal received the digital video signal parcel of corresponding sequence number, because of it has enough bandwidth), sequence number according to client Streaming Media transmission control protocol and each packet synthesizes video/audio data flow again with it, exports behind digital video-audio decompression device decompress(ion) again.
2, transmitting terminal is fixing transmitting terminal, receiving terminal is mobile video and audio terminal, receiving terminal moves (referring to Fig. 2) that video and audio terminal computer PORT COM is provided with the expansion PORT COM: the simulation video/audio signal that transmitting terminal compression of digital video device will be imported is compressed into the digital video-audio signal, and according to the Streaming Media transmission control protocol, with software this digital video-voice frequency flow is resolved into two or more parcels in real time, there is its unique sequence number in each packet header, parcel after then these being decomposed sends to receiving terminal by the mobile communications network platform, receiving terminal is mobile video and audio terminal, the PORT COM and the wireless communication module number of its each expansion equate with the Packet number that is decomposed, under the distribution of software, each wireless communication module and expansion PORT COM receive the Packet of a correspondence respectively, so just form two or more transport stream, receiving end computer synthesizes video/audio data flow according to the sequence number of client Streaming Media transmission control protocol and each packet again with these parcels, exports behind digital video-audio decompression device decompress(ion) again.
3. transmitting terminal and receiving terminal are mobile video and audio terminal (referring to Fig. 3), have at least an end computer PORT COM to be provided with Extended Capabilities Port, in this case, because of an existing at least end is provided with Extended Capabilities Port, no matter whether the other end is provided with the expansion PORT COM, all can reach to improve and look the purpose of audio transmission speed,, then can further improve the video/audio transmission speed if the other end also is provided with the expansion PORT COM.
The utility model is provided with a plurality of expansion PORT COM and wireless communication module at a mobile video and audio terminal, its effect is equivalent to be extended to a plurality of mobile video and audio terminals, and a plurality of portable terminals are bundled, simultaneously same compressed audio and video data stream is carried out Network Transmission, thereby improved bandwidth, reach the raising data transmission bauds, improve the requirement of transmission of video image quality.For example concerning CDMA cat (wireless communication module), a CDMA uploads upstream rate and has only 30 ~ 60k bps, two CDMA cats and to catch the scanning frequency rate be 60 ~ 120k bps, 3 CDMA cats and to catch the scanning frequency rate be exactly 90 ~ 180k bps bundle a plurality of portable terminals by that analogy and can reach the purpose that promotes bandwidth.
Description of drawings
The frame structure schematic diagram of Fig. 1, the utility model embodiment 1 (transmitting terminal is a portable terminal, is provided with the expansion PORT COM)
The frame structure schematic diagram of Fig. 2, the utility model embodiment 2 (receiving terminal is a portable terminal, is provided with the expansion PORT COM)
The frame structure schematic diagram of Fig. 3, the utility model embodiment 3 (transmitting terminal, receiving terminal are portable terminal, and are equipped with the expansion PORT COM)
Fig. 4, the utility model embodiment 1 transmitting terminal circuit structure diagram
Fig. 5, the utility model embodiment 1 receiving terminal circuit structure chart
Fig. 6, USB shown in Figure 4 change 8 serial equipment circuit structure diagrams
Fig. 7, PL-2303 chip frame structure schematic diagram shown in Figure 6
Fig. 8, the utility model embodiment 1 data transport stream journey figure
Embodiment
Embodiment 1
This example is the real-time monitoring system that is used for the security protection industry, and transmitting terminal is that monitoring is on-the-spot, adopts mobile video and audio terminal, and receiving terminal is a Surveillance center, adopts fixedly receiving terminal.
This routine frame structure schematic diagram is seen Fig. 1, particular circuit configurations figure sees Fig. 4, the computer digit video of this routine transmitting terminal, the audio compression device adopts and is inserted with the ordinary PC that the Haikang becomes to look the DS-400XH/HC compressing card, this machine is provided with the USB PORT COM, the analog video signal output of the monitoring camera of collection site signal is connected with the video inputs mouth of aforementioned calculation machine compression set DS-400XH/HC card, the audio input port of compression set DS-400XH/HC card is connected on audio signal output end and the computer, and computer PORT COM USB connects news port expansion equipment.
Referring to Fig. 6, this routine expansion equipment adopts USB to change 8 serial ports expansion equipment, aforementioned calculation machine USB interface is connected with PORT COM expanding unit usb hub, usb hub is established 8 and is connect expanding USB interface, and each expanding USB interface is connected with corresponding RS232 interface by interface conversion chip and level transferring chip respectively.
This routine interface conversion chip adopts USB RS 232 bridge chip PL-2303 chip, and each PL-2303 chip is connected with the RS232 interface by the SP213EH level transferring chip respectively.
The effect of hub is a plurality of USB interface of expansion, described USB RS 232 bridge chip PL-2303 (USB-to-Serial Bridge Controller) is Taiwan prolific production, its circuit theory diagrams ginseng Fig. 7, the function of this chip is to drive data and the control signal that the USB PORT COM sends over and convert the RS232 signal to, during reverse use, also possess and drive and convert RS232 data and control signal the function of usb signal to, the level transferring chip effect is that PL-2303 chip signal output level conversion is become the RS232 level signal.
8 RS232 extended serial PORT COM of this routine expansion equipment setting connect wireless communication module CDMA-1X module respectively, these 8 portable terminals that bundle by UNICOM's network to receiving terminal video monitoring server transmission look, audio signal.
Receiving terminal is fixing receiving terminal, and the broadband access of its video monitoring server is an ADSL, internet net on the dial-in direct.Computer digit is looked, the audio decompression device adopts the ordinary PC that is inserted with DS-4002MD/DS4004D decompress(ion) card, and DS4002MD/DS4004D decompress(ion) snap gauge is intended video output terminals and connect matrix, and audio output connects sound equipment, and computer display card connects display.
Carrying out the process that video data reportedly send with this device is (see figure 8), the DS-400XH/HC compressing card becomes digital video with the analog video image compression of monitoring camera input, and send the application software on the PC to, by stream Streaming Media transmission control protocol in the application software, digital video frequency flow is resolved into 8 parcels (all there is its unique sequence number in each packet header), and change the driving of 8 PL-2303 chips in 8 serial equipments and convert the RS232 signal to by USB respectively, send to respectively and change the CDMA-1X wireless communication module that 8 RS232 mouths on 8 serial equipments are connected with USB, send Packet to receiving terminal respectively by the CDMA-1X wireless communication module, (fixedly receiving terminal can satisfy bandwidth requirement to 8 data parcels that receiving terminal sends over by ADSL cat receiving end/sending end, so do not carry out the expansion of PORT COM), and according to the synthetic again digital video frequency flow of client Streaming Media transmission control protocol, digital video frequency flow after client application software just will synthesize this moment sends to DS-4002MD/DS4004D decompress(ion) card, by the decompress(ion) card video image is outputed to display on matrix and this machine, audio frequency is outputed to sound equipment.
This routine transmitting terminal computer PORT COM is a USB port, the expansion PORT COM is the RS232 mouth, so between PORT COM expanding unit and expansion PORT COM, be provided with the interface conversion chip, if when PORT COM is same style interface with the expansion PORT COM, can save this conversion links circuit.
Embodiment 2
This routine frame structure schematic diagram is seen Fig. 2, its transmitting terminal is fixing transmitting terminal, receiving terminal is mobile video and audio terminal, receiving terminal is provided with the PORT COM expanding unit that is connected with the computer PORT COM, each expansion PORT COM of expanding unit is connected with the wireless communication module that audio compression signal corresponding data parcel is looked in reception respectively, the circuit structure of its PORT COM, expansion PORT COM and wireless communication module and the embodiment 1 circuit structure communication network that relatively moves is symmetrical, other parts are identical, so save physical circuit figure.
This routine transmitting terminal is fixing transmitting terminal, and bandwidth can be satisfied the demand, and receiving terminal is a portable terminal, so be provided with the expansion PORT COM, reach and bundle a plurality of portable terminals, raising compressed video signal transmission speed purpose.
Embodiment 3
This routine frame structure schematic diagram is seen Fig. 3, its transmitting terminal and receiving terminal are mobile video and audio terminal, the problem that all has narrow bandwidth, so the computer PORT COM to both-end all is provided with the expansion PORT COM, transmitting terminal is provided with four Extended Capabilities Port, receiving terminal is provided with two Extended Capabilities Port, in actual applications, transmitting terminal is according to the Streaming Media transmission control protocol, with software digital video-voice frequency flow is resolved into four data parcels in real time, there is its unique sequence number in each packet header, parcel after then these being decomposed sends to receiving terminal by the mobile communications network platform, two Extended Capabilities Port of receiving terminal are under software control, receive this four parcels successively, be input to computer by the computer PORT COM, computer synthesizes video/audio data flow according to the sequence number of client Streaming Media transmission control protocol and each packet again with these parcels, exports behind digital video-audio decompression device decompress(ion) again.
Be at both-end under the situation of mobile video and audio terminal, the small data packets number that video/audio is decomposed, the Extended Capabilities Port quantity of a end that should be many with the expansion PORT COM is set is consistent, to reach the purpose that improves data transmission bauds to greatest extent, the other end is if can reach the Extended Capabilities Port of equal number, can further improve data transmission bauds to greatest extent, if be less than this Packet number, or Extended Capabilities Port is not set, then speed can be hanged down, but expense also can be hanged down, and this will look the customer requirements design.
Claims (5)
1, a kind of moving looked audio transmission system, be provided with the video/audio signal transmitting terminal and the video/audio signal receiving terminal that connect by the mobile communications network platform, transmitting terminal is provided with computer digit and looks the audio compression device, this device is provided with simulation video/audio signal input and PORT COM output, receiving terminal is provided with computer digit and looks the audio decompression device, this device is provided with PORT COM input and decompress(ion) video/audio signal output, it is mobile video and audio terminal that described video/audio signal transmitting terminal and receiving terminal have a side at least, it is characterized in that: the mobile video and audio terminal that has a side at least, the computer PORT COM of its digital video-audio compression or decompression device is connected to the PORT COM expanding unit, and this PORT COM expanding unit is provided with and is no less than two expansion PORT COM that are connected with wireless communication module respectively.
2, according to claim 1 moving looked audio transmission system, and it is characterized in that: described video/audio signal transmitting terminal is mobile video and audio terminal, and its computer PORT COM is provided with the expansion PORT COM, and receiving terminal is a fixed terminal.
3, according to claim 1 move looked audio transmission system, and it is characterized in that: described video/audio signal receiving terminal is mobile video and audio terminal, and its computer PORT COM is provided with the expansion PORT COM, and transmitting terminal is fixing transmitting terminal.
4, according to claim 1 moving looked audio transmission system, and it is characterized in that: described video/audio signal transmitting terminal and receiving terminal are mobile video and audio terminal, have at least an end computer PORT COM to be provided with Extended Capabilities Port.
5, look audio transmission system according to claim 1,2,3 or 4 described moving, it is characterized in that: described computer PORT COM is a USB interface, this port is connected with PORT COM expanding unit usb hub, usb hub is provided with two or more expanding USB interface, and each expanding USB interface is connected with corresponding RS232 interface by interface conversion chip (PL-2303) and level transferring chip respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017897 CN2792059Y (en) | 2005-05-13 | 2005-05-13 | Mobile autio-video transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017897 CN2792059Y (en) | 2005-05-13 | 2005-05-13 | Mobile autio-video transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN2792059Y true CN2792059Y (en) | 2006-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520017897 Expired - Lifetime CN2792059Y (en) | 2005-05-13 | 2005-05-13 | Mobile autio-video transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296143B (en) * | 2007-12-18 | 2011-07-20 | 深圳市宏电技术股份有限公司 | Method for multiplying band width of wireless communication system |
-
2005
- 2005-05-13 CN CN 200520017897 patent/CN2792059Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296143B (en) * | 2007-12-18 | 2011-07-20 | 深圳市宏电技术股份有限公司 | Method for multiplying band width of wireless communication system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150513 Granted publication date: 20060628 |