CN201409207Y - Digital mobile multimedia transmission device - Google Patents
Digital mobile multimedia transmission device Download PDFInfo
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- CN201409207Y CN201409207Y CN2009201406229U CN200920140622U CN201409207Y CN 201409207 Y CN201409207 Y CN 201409207Y CN 2009201406229 U CN2009201406229 U CN 2009201406229U CN 200920140622 U CN200920140622 U CN 200920140622U CN 201409207 Y CN201409207 Y CN 201409207Y
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Abstract
The utility model provides a digital mobile multimedia transmission device; an initiation facility comprises an audio-video encoder, a multiplexer, an FE/TS converter, a COFDM modulator and a microwave transmission part; audio-video signals are connected with the encoder and the multiplexer; Ethernet signals or ASI relay signals from the FE/TS converter are accessed to the COFDM modulator througha switch, and then transmitted after amplification and filtration. A receiving end facility comprises a microwave signal receiving part, a COFDM demodulator, a brancher, a TS-FE converter, a demultiplexer and an audio-video decoder; demodulated signals are divided into three paths, wherein one path of demodulated signals are output to an ASI relay port, one path of demodulated signals are reducedinto original audio-video signals and RS 232 signals after de-multiplexing and decoding, and the third path of demodulated signals are reduced into Ethernet signals through the TS-FE converter. The device can realize the multimedia business of the wideband such as two-way and real-time transmission video and audio, wideband data, voice and the like, is provided with plentiful external interfaces,and can be matched with the prior other transmission devices so as to realize the remote transmission.
Description
(1) technical field
The utility model relates to the microwave transport equipment technical field, is specially a kind of digital mobile multimedia transmission equipment.
(2) background technology
Growing along with wireless communication technology, mobile multimedia is used day by day becomes the focus of paying close attention in the industry.The new military technology of build computerized armed forces, win following IT-based warfare, actively pushing forward distinct Chinese characteristics is changed, and is the great strategic task that my army faces.Army is when carrying out Field Operational, scouting, training and military exercises, operational commanding control centre is in order to monitor on-the-spot manoeuvre situation in real time, must multimedias such as the image at scene, voice, data be real-time transmitted to combat operations center by communication command vehicle, the leader of command centre just can as be in the action, in time issue an order, combat duty is finished in each action of coordinative command timely and accurately.And the communication mode of my army mainly was that the voice communication in radio station is main in the past, was difficult to satisfy the needs of modern war.
In addition in burst health and epidemic prevention incident and when nature such as earthquake, floods, environmental pollution and man-made disaster take place, must directly pass the multimedia messagess such as image, voice, picture and global positioning system (GPS) data at scene back front headquarter, realize quick resolution, accurately commanded.At present, in emergency communication field, particularly emergency communication demand, still there is not ripe instant mobile multimedia communication apparatus in particularly serious incident.
To gather transmission, Wireless-wire networking transmission, remote relay transmission and computer network transmission in the high-speed mobile under the non line of sight condition in order being implemented in, to need development digital mobile multimedia transmission equipment.
And can under various environment such as vehicle-mounted, airborne, carrier-borne, as to bear, be widely used in remote live dispatch control, cotaskings such as battlefield multimedia messages transmission, operational commanding, accident, mobile command, tracking are scouted, promptly speedily carried out rescue work, remote monitoring, field work and finish.
(3) utility model content
The purpose of this utility model is a kind of digital mobile multimedia transmission equipment of design, adopt Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) multi-carrier modulation, can in non line of sight, high-speed mobile, work, broadband multimedia services such as two-way, real-time transmission of video, audio frequency, wideband data, voice, and can match with existing other transmission equipments, realize long-distance transmissions.
The digital mobile multimedia transmission equipment of the utility model design comprises make a start facility and receiving end facility.The facility of making a start comprises Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator and microwave radiating portion, and the microwave radiating portion comprises power amplifier, filter and the transmitting antenna that connects successively.The Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects the power amplifier of microwave radiating portion.The receiving end facility comprises microwave collection of letters part and Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator, and microwave receiving part branch comprises reception antenna, receipts filter, the low noise amplifier that connects successively.The low noise amplifier of microwave collection of letters part connects the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator.
The facility of making a start also comprises audio/video coder, multiplexer, Ethernet/transport stream (FE/TS) transducer.Video inputs mouth, audio input port and phonetic entry port connect audio/video coder, audio/video coder and serial communication input port (RS232 port) couple in multiplexer together connect K switch 2 inputs again, and the sound behind the compressed encoding, vision signal, voice signal and serial communication signals become a serial transport stream (TS stream) signal behind multiplexer; The Ethernet input port connects Ethernet/transport stream, connects the input of K switch 1 again, and asynchronous serial data (ASI) input port also connects K switch 1 input.The input of the output termination K switch 2 of K switch 1.The output termination Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator of K switch 2.The transport stream testing circuit 1 that contains in Ethernet/transport stream (FE/TS) transducer connects K switch 1 control end.Transport stream testing circuit 2 in the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects K switch 2 control ends.The ethernet signal of Ethernet input port obtains serial transmission stream (TS stream) signal through Ethernet/transport stream.When the transport stream testing circuit 1 in Ethernet/transport stream (FE/TS) transducer detects this road transport stream (TS stream) signal is arranged, control switch K1 disconnection asynchronous serial data input port is connected with K switch 2 inputs, and Ethernet/transport stream is connected to K switch 2 inputs.Otherwise, when the transport stream testing circuit 1 in Ethernet/transport stream (FE/TS) transducer detects this road and does not have transport stream (TS stream) signal, control switch K1 connects asynchronous serial data input port and K switch 2 inputs, and disconnection Ethernet/transport stream is connected with K switch 2 inputs.Transport stream (TS stream) signal that comes from multiplexer and after transport stream (TS stream) signal of K switch 1 passes through K switch 2, deliver to Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) modulator and modulate, when the output that detects K switch 1 when the transport stream testing circuit 2 in Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) modulator has transport stream (TS stream) signal, control switch K2 disconnection multiplexer is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, the output of K switch 1 is connected to the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, to modulating from the signal of ethernet port or asynchronous serial data input port.Otherwise, when the output that detects K switch 1 when the transport stream testing circuit 2 in Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) modulator does not have transmission stream signal, control switch K2 connection multiplexing device is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, the output of cut-off switch K1 is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, and the signal from multiplexer is modulated.
The receiving end facility also comprises splitter, transport stream/Ethernet (TS/FE) transducer, demodulation multiplexer and audio/video decoder.Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) demodulator connects splitter, and splitter output has three the tunnel, the one tunnel directly to connect asynchronous serial data (ASI) output port; The second the tunnel connects demodulation multiplexer, and demodulation multiplexer connects audio/video decoder and serial data output port, and audio/video decoder connects audio output port, video-out port and voice output port; Third Road connects transport stream/Ethernet transducer, connects the Ethernet output port again, is reduced into ethernet signal output through transport stream/Ethernet transducer.
Make a start facility audio/video coder, multiplexer, Ethernet/transport stream, Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator and microwave radiating portion power amplifier, send out a filter and be fixedly installed in the casing of making a start, the receipts filter of the microwave receiving of receiving end facility part and low noise amplifier and Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator, splitter, transport stream/Ethernet transducer, demodulation multiplexer and audio/video decoder are fixedly installed in the receiving end casing.
The advantage of the utility model digital audio microwave transport equipment is: 1. can be two-way, broadband multimedia services such as transmission of video, audio frequency, wideband data, voice in real time; 2. have abundant external interface: ethernet standard interface, video and audio signal interface, speech interface, serial communication (RS232) interface and ASI interface, can match with existing other transmission equipments, realize the long-distance transmissions of multi-media signal; 3. adopt 47～850MHz frequency range, the COFDM multi-carrier modulation can be worked in non line of sight, high-speed mobile, and maximum speed can reach 500km/h; 4. adopt the configuration of multiple different transmitting power (0.5W～20W) and antenna configurations, coverage can reach 30km under typical urban environment; 5. make a start facility and receiving end facility installed concentratedly and is convenient to transportation installs and use under mobile status in two casings.
(4) description of drawings
Fig. 1 is the circuit block diagram of this digital mobile multimedia transmission equipment embodiment inchoation equipment.
Fig. 2 is the circuit block diagram of this digital mobile multimedia transmission equipment embodiment receiving end equipment.
(5) embodiment
This digital mobile multimedia transmission equipment embodiment comprises make a start facility and receiving end facility, make a start facility audio/video coder, multiplexer, Ethernet/transport stream, Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, power amplifier and send out a filter and be fixedly installed in the casing of making a start, the receipts filter of receiving end facility, low noise amplifier are fixedly installed in the receiving end casing with, Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator, splitter, transport stream/Ethernet transducer, demodulation multiplexer and audio/video decoder.
This example is made a start the facility circuit structure as shown in Figure 1.Video inputs mouth, audio input port and phonetic entry port connect audio/video coder, audio/video coder and serial communication input port (RS232 port) couple in multiplexer together connect K switch 2 inputs again, and the sound behind the compressed encoding, vision signal, voice signal and serial communication signals become a serial transport stream (TS stream) signal behind multiplexer; The Ethernet input port connects Ethernet/transport stream, connects K switch 1 input again, and asynchronous serial data (ASI) input port also connects K switch 1 input.The input of the output termination K switch 2 of K switch 1.The output termination Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator of K switch 2.The Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects power amplifier, and power amplifier connects sends out filter and transmitting antenna.The transport stream testing circuit 1 that contains in Ethernet/transport stream (FE/TS) transducer connects K switch 1 control end.Transport stream testing circuit 2 in the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects K switch 2 control ends.When the transport stream testing circuit 1 in Ethernet/transport stream (FE/TS) transducer detects this road transport stream (TS stream) signal is arranged, control switch K1 disconnection asynchronous serial data input port is connected with K switch 2 inputs, and Ethernet/transport stream is connected to K switch 2 inputs.Otherwise, when the transport stream testing circuit 1 in Ethernet/transport stream (FE/TS) transducer detects this road and does not have transmission stream signal, control switch K1 connects asynchronous serial data input port and K switch 2 inputs, and disconnection Ethernet/transport stream is connected with K switch 2 inputs.When the output that detects K switch 1 when the transport stream testing circuit 2 in Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) modulator has TS stream signal, control switch K2 disconnects being connected of multiplexer and Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, and the output of K switch 1 is connected to the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator.Otherwise, when the output that detects K switch 1 when the transport stream testing circuit 2 in Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) modulator does not have TS stream signal, control switch K2 connection multiplexing device is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, and the output of cut-off switch K1 is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator.
Audio-video signal and voice signal enter audio/video coder through sound, video inputs mouth, phonetic entry port, audio/video coder carries out the MPEG-2/H.264 compressed encoding to vision signal, audio signal and voice signal are carried out the MPEG-1 compressed encoding, sound behind the coding, vision signal, voice signal and be admitted to multiplexer together from the serial communication data of serial communication (RS232) input port are multiplexed to a serial TS flow data and insert K switch 2; In addition, ethernet signal is sent into Ethernet/transport stream through the Ethernet input port, ethernet signal also obtains serial TS stream signal and inserts K switch 1 after Ethernet/transport stream, the asynchronous serial data input port also inserts K switch 1 as the ASI signal of repeating signal, the output termination K switch 2 of K switch 1, when the TS current detection circuit 1 in Ethernet/transport stream detects this road TS stream signal is arranged, control switch K1 disconnection asynchronous serial data input port is connected with K switch 2, and Ethernet/transport stream is connected to K switch 2.TS from multiplexer flows signal and modulates through delivering to the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator after the K switch 2 through the TS of K switch 1 stream signal, TS current detection circuit 2 in the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects K switch 2 control ends, when the output that detects K switch 1 when TS current detection circuit 2 has TS stream signal, control switch K2 disconnection multiplexer is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, the output of K switch 1 is connected to the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, to modulating from the signal of ethernet port or TS stream relaying input port.The TS data flow of sending into the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator through processing such as RS error correction, Forney convolutional interleave, Viterbi error correction, interior interweaving encodings after the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulation, realized that I, Q signal are to 2k pattern 1512 carrier waves or to the conversion of 6048 carrier waves of 8k pattern, modulated signal is received power amplifier and is amplified, carry out filtering through sending out filter, radiofrequency signal is carried out the spatial microwave transmission by transmitting antenna then.
The circuit structure of the receiving end facility of the digital mobile multimedia transmission equipment that this is routine as shown in Figure 2.
The reception antenna of Lian Jieing, receipts filter, low noise amplifier are formed microwave collection of letters part successively, and low noise amplifier connects the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator.Coded Orthogonal Frequency Division Multiplexing (COFDM) (COFDM) demodulator connects splitter, and splitter output has three the tunnel, the one tunnel directly to connect asynchronous serial data (ASI) output port; The second the tunnel connects demodulation multiplexer, demodulation multiplexer connects audio/video decoder and serial data output port, audio/video decoder connects audio output port, video-out port and voice output port, and Third Road connects transport stream/Ethernet transducer, connects the Ethernet output port again.
The radiofrequency signal that reception antenna receives inserts receives filter, entering low noise amplifier again amplifies, deliver to the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator afterwards and go error correction, deinterleave etc. and to be reduced into the TS flow data after a series of processing, the TS stream signal of the splitter that is connected with the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator after with demodulation is divided into three two-way, one the tunnel directly exports from the asynchronous serial data output port as repeating signal, one the tunnel delivers to demodulation multiplexer, audio/video decoder is handled, be reduced into original sound, vision signal, voice signal and serial communication (RS232) signal, respectively from video-out port, audio output port, voice output port and serial communication output port are sent, transport stream/Ethernet transducer is delivered on another road, is reduced into the Ethernet interface signal and sends from the Ethernet output port.
The foregoing description is the specific case that the purpose of this utility model, technical scheme and beneficial effect are further described only, and the utility model is not to be defined in this.All any modifications of within scope of disclosure of the present utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the present utility model.
Claims (2)
1, a kind of digital mobile multimedia transmission equipment, comprise make a start facility and receiving end facility, the facility of making a start comprises Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator and microwave radiating portion, the microwave radiating portion comprises the power amplifier that connects successively, send out filter and transmitting antenna, the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects the power amplifier of microwave radiating portion, the receiving end facility comprises microwave collection of letters part and Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator, microwave receiving part branch comprises the reception antenna that connects successively, receive filter, low noise amplifier, the low noise amplifier of microwave collection of letters part connects the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator; It is characterized in that:
The facility of making a start also comprises audio/video coder, multiplexer, Ethernet/transport stream, video inputs mouth, audio input port and phonetic entry port connect audio/video coder, audio/video coder and serial communication input port couple in multiplexer together connect the input of K switch 2 again, the Ethernet input port connects Ethernet/transport stream, connect K switch 1 input again, the asynchronous serial data input port also connects K switch 1 input, the input of the output termination K switch 2 of K switch 1, the output termination Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator of K switch 2; The transport stream testing circuit 1 that contains in Ethernet/transport stream connects K switch 1 control end, and the transport stream testing circuit 2 in the Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator connects K switch 2 control ends;
The receiving end facility also comprises splitter, transport stream/Ethernet transducer, demodulation multiplexer and audio/video decoder, and the Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator connects splitter, and splitter output has three the tunnel, the one tunnel directly to connect the asynchronous serial data output port; The second the tunnel connects demodulation multiplexer, and demodulation multiplexer connects audio/video decoder and serial data output port, and audio/video decoder connects audio output port, video-out port and voice output port; Third Road connects transport stream/Ethernet transducer, connects the Ethernet output port again.
2, digital mobile multimedia transmission equipment according to claim 1 is characterized in that:
The audio/video coder of the described facility of making a start, multiplexer, Ethernet/transport stream, Coded Orthogonal Frequency Division Multiplexing (COFDM) modulator, power amplifier and a filter are fixedly installed in the casing of making a start, and the receipts filter of receiving end facility, low noise amplifier, Coded Orthogonal Frequency Division Multiplexing (COFDM) demodulator, splitter, transport stream/Ethernet transducer, demodulation multiplexer and audio/video decoder are fixedly installed in the receiving end casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201406229U CN201409207Y (en) | 2009-03-24 | 2009-03-24 | Digital mobile multimedia transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201406229U CN201409207Y (en) | 2009-03-24 | 2009-03-24 | Digital mobile multimedia transmission device |
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| Publication Number | Publication Date |
|---|---|
| CN201409207Y true CN201409207Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201406229U Expired - Fee Related CN201409207Y (en) | 2009-03-24 | 2009-03-24 | Digital mobile multimedia transmission device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195664A (en) * | 2011-04-14 | 2011-09-21 | 西安烽火电子科技有限责任公司 | Multi-path microwave digital receiver |
| CN102291567A (en) * | 2011-04-14 | 2011-12-21 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN104009789A (en) * | 2014-06-11 | 2014-08-27 | 公安部上海消防研究所 | Broadband wireless communication device for fire-fighting robot |
-
2009
- 2009-03-24 CN CN2009201406229U patent/CN201409207Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195664A (en) * | 2011-04-14 | 2011-09-21 | 西安烽火电子科技有限责任公司 | Multi-path microwave digital receiver |
| CN102291567A (en) * | 2011-04-14 | 2011-12-21 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN102291567B (en) * | 2011-04-14 | 2013-10-02 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN102195664B (en) * | 2011-04-14 | 2014-04-16 | 西安烽火电子科技有限责任公司 | Multi-path microwave digital receiver |
| CN104009789A (en) * | 2014-06-11 | 2014-08-27 | 公安部上海消防研究所 | Broadband wireless communication device for fire-fighting robot |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20130324 |