CN201937780U - Vehicle-mounted wireless video terminal - Google Patents
Vehicle-mounted wireless video terminal Download PDFInfo
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- CN201937780U CN201937780U CN 201120007444 CN201120007444U CN201937780U CN 201937780 U CN201937780 U CN 201937780U CN 201120007444 CN201120007444 CN 201120007444 CN 201120007444 U CN201120007444 U CN 201120007444U CN 201937780 U CN201937780 U CN 201937780U
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Abstract
The utility model relates to a vehicle-mounted wireless video terminal, which comprises a two-channel video server, a global positioning system (GPS) module, a wireless access module, a network switch, a power supply module and a light emitting diode (LED) display panel, wherein the GPS module, the wireless access module and the network switch are respectively connected with the two-channel video server, the network switch is also connected with the wireless access module, the power supply module supplies electricity to the two-channel video server and the network switch, and the LED display panel is connected with the two-channel video server and the wireless access module. The wireless video terminal provided by the utility model belongs to the wireless video terminal supporting high-definition coding, high-definition images and bidirectional voice data with the D1 resolution factor at 25 frames per second can be transmitted in real time by a 340M wireless network, and in addition, the GSP positioning function is realized.
Description
Technical field
The utility model relates to emergency communication commander field, particularly relates to a kind of vehicle carried wireless video terminal.
Background technology
At present,,, many problems have been produced thus, for example: national frequency band division, bandwidth availability ratio, narrow band transmission, wideband transmit, GPS location because emergent scope constantly enlarges at emergency communication commander field headend equipment.
Because Ministry of Industry and Information has determined the emergency communication commander and has used the 336-344MHz frequency range, has solved the problem of the confusion of market use frequency range.At present the urgent need problem that will solve be wireless coverage, user fail safe, mobility, realize video transmission under the band-limited situation and guarantee picture quality, under band-limited situation, realize the multiplex telephony voice transfer and ensure the quality of products, working service is convenient.
The headend equipment in the commander of emergency communication at present field has COFDM equipment, 350,000,000 Digital Clustering equipment, 3G equipment, above-mentioned these equipment all have separately a bit and shortcoming, for example, COFDM equipment is single construction equipment, picture-and-sound be can only transmit and receive, radio voice and call voice function lacked; 350,000,000 Digital Clustering equipment are half-duplex apparatuses, have the radio voice function, but the image transmittability very a little less than, do not support moving image transmitting defeated, do not have telephony feature yet; 3G equipment is full duplex equipment, but faces hot issue again in the emergency communication field, and its video transmission bandwidth is restricted simultaneously, does not transmit the D1 form.
McVics wireless video communication emergency commading system is that a kind of employing 340MHz wireless frequency is a transmission channel, is technological core with SCDMA, based on the IP framework, provides the wireless broadband system of multiple application modes such as data, video, voice for the user.This system has used accurate 4G technology, and adopts intelligent antenna technology, transmission bandwidth height, wide coverage, and base station use macrocellular principle have higher diffracting power, support the non line of sight transmission, therefore, need a kind of vehicle carried wireless video terminal that is used in this system.
The utility model content
At defective that exists in the prior art and deficiency, the utility model proposes a kind of vehicle carried wireless video terminal of the McVics of being used in wireless video communication emergency commading system, can transmit the video image of D1 form and supporting telephone voice, on-the-spot sound accompaniment, radio voice glibly.
To achieve these goals, the utility model proposes a kind of vehicle carried wireless video terminal, comprise the two-way video server, GPS module, radio access module, the network switch that links to each other with described two-way video server respectively, the described network switch also links to each other with described radio access module, be the power module of described two-way video server, the power supply of the described network switch, the LED display panel that links to each other with described two-way video server, described radio access module.
Preferred as technique scheme, described two-way video server comprises the SOC processor, two video coding chips, network interface chip for driving, a plurality of serial ports, memory interface, the power module that links to each other with described SOC processor respectively, described network interface chip for driving is network interface in succession, and described two video coding chips connect two video interfaces respectively;
Described two-way video server links to each other with described GPS module by one in described a plurality of serial ports, links to each other with described radio access module by described network interface.
Preferred as technique scheme, described SOC processor be used to realize two-way D1 resolution in real time H.264, the HD video coding of MPEG4 or Motion jpeg format.
Preferred as technique scheme, described two-way video server comprises plug in software module, described plug in software module comprises with lower module:
The host process module is used for being responsible for carrying out communication with central server, the state of each module is reported to server, and received the order that sends over from server, these orders is distributed to each software module goes to carry out;
Network media service module is used to provide the real-time audio and video data;
Video encoding module, the coding video data that is used for obtaining compresses, and the real time video data after the compression is put into shared drive;
Picture recording module is used to create local video file, and the real-time storage video data is to memory device;
Transparent serial ports service module is used for the bridge joint of the network port and serial ports;
The FTP service module is used to provide the FTP login service, and the user can login video server by the FTP mode, by download equipment daily record and video file behind the cipher authentication;
The Telnet service module is used to provide remote login service, and the technical staff can pass through telnet mode Telnet equipment, and equipment is safeguarded and failure diagnosis;
Logger module is used to write down the operation information of each software module key;
Customer parameter is provided with module, is used for the interactive interface between equipment and the user;
The process monitoring module is used for software module is monitored, and abnormality occurs if find certain module, will restart this software module.
Preferred as technique scheme, described radio access module is used for described two-way video server access of radio network, and possesses the wireless voice communication function.
Preferred as technique scheme, described radio access module also comprises power interface, telephony interface, network interface, radio-frequency antenna interface.
The advantage of the vehicle carried wireless video terminal that the utility model proposes is video transmission; Voice transfer; Multiple functions such as GPS location roll into one, and video can real-time Transmission D1 image quality image and local, strange land storage; Session Initiation Protocol supported in voice; GPS supports track following; But high-speed mobile, translational speed＞180km/h.Compare with other emergence technology have networking flexibility, have high maneuvering characteristics, multiple function, guarantee communication security, beneficial effect such as image effect is clear, coverage distance is far away.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.For the person of ordinary skill in the field, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.
Description of drawings
Fig. 1 is the utility model system block diagram;
Fig. 2 is the system block diagram of video server in the utility model;
Fig. 3 is the network portion circuit diagram of video server in the utility model;
Fig. 4 is the SD card interface circuit schematic diagram of video server in the utility model;
Fig. 5 is the circuit diagram of the encoder chip of video server in the utility model;
Fig. 6 is the software architecture schematic diagram of video server in the utility model;
Fig. 7 is a CPE logic function block diagram in the utility model.
Embodiment
As shown in Figure 1, a kind of vehicle carried wireless video terminal that the utility model proposes, comprise: comprise the two-way video server, GPS module, radio access module, the network switch that links to each other with described two-way video server respectively, the described network switch also links to each other with described radio access module, be the power module of described two-way video server, the power supply of the described network switch, the LED display panel that links to each other with described two-way video server, described radio access module.
Wherein, described two-way video server comprises SOC processor (for example GM8180), two video coding chips that link to each other with described SOC processor (for example TW9910A, TW9910B), network interface chip for driving (for example DM9161A), a plurality of serial ports (serial ports 1, serial ports 2), memory interface (for example SD card), power module respectively, described network interface chip for driving is network interface in succession, and described two video coding chips connect two video interfaces respectively;
Described two-way video server links to each other with described GPS module by described serial ports, links to each other with described radio access module by described network interface.
In addition, as shown in Figure 1, the camera that it is 12V that this wireless video terminal outside can connect 2 working powers is imported as video.Power module is converted into the 12V DC power supply of Vehicular accumulator cell output and 5V power supply and 9V power supply.The 5V power supply is supplied with two-way video server and radio access module respectively, and the 9V power supply is given power supply for exchange.Video server is converted to 3.3V for the GPS module with 5V, and by serial ports 1 and GPS module communication.The network interface of radio access module and the network interface of video server interconnect by switch.The LED display panel links to each other with video server with wireless module by holding wire.
The two-way video server is a core component of the present utility model, and its function mainly comprises: encoding video pictures compression, video file storage, gps data collection and Data Communication in Computer Networks.In addition, also have the DC/DC power transfer module on the circuit board of network video server, the power supply that responsible 12V power source conversion with battery output is 3.3V and 5V is given the power supply of GPS module and radio access module respectively.After handling, voltage stabilizing circuit on the 5V power supply process video server of power module output and current-limiting circuit be transferred to radio access module again.
Shown in Fig. 2,3,4,5, the video server hardware components mainly is made up of following integrated circuit (IC) chip: network interface chip for driving DM9161A, 2 video device coding chip TW9910, SOC (system on chip) processor GM8180.Whole system has the 128MB internal memory, the flash memory of 128Mb.GM8180 inner integrated an ARM9 processor and a FA626 processor core.H.264 the FA626 processor carries the CODEC with MPEG4, can realize the JPEG HD video coding H.264/MPEG4/Motion in real time of two-way D 1 resolution.The ARM9 processor is responsible for Data Communication in Computer Networks, serial communication and peripheral circuit control etc.In addition, GM8180 self also has the SD card controller, and this makes video server can connect the SD card memory, is used for storing video file.Video server has the network interface of 10M/100M, and it can pass through wire/wireless dual mode access network.In addition, network video server can receive the navigation positioning data of GPS module by serial ports output in real time, and these locator datas are sent to the alarm center service platform by radio access module.
As shown in Figure 2, there are two serial ports the GM8180 outside in the two-way video server.Serial ports 1 is the RS232 serial ports, is responsible for carrying out communication with the GPS module.Serial ports 2 is RS485 serial ports, is responsible for control external ball machine and camera.The power source conversion that the power module of video server inside is responsible for 5V is the electronic device power supply of the power supply of 3.3V/1.8V/2.5V to other.The inner integrated SD card controller of GM8180 can directly be controlled read-write SD card.In addition, GM8180 also has the EthernetMAC controller, and physical layer transceiver DM9161A has been expanded in the outside, has just realized network communication interface.
Applicating example: the analog video data that sends over from external camera carries out the AD conversion by TW9910 earlier, becomes digital video signal and inputs to GM8180.The FA626 processor of GM8180 carries out compressed encoding with these data, output ES flow data is in shared drive, application program converts audio/video file to after receiving these data, leave in the hard disk, also these data transaction are become simultaneously and can send to central platform, thereby realized the function of local video recording storage and real-time video transmission for the packet of Network Transmission.
The software platform of video server adopts embedded arm-linux operating system, and its network communication function is very powerful and stable and reliable for performance.Driver and application program all adopt standard C language to write, and are easy to the transplanting of software.Application program adopts modular design method, and each software module is finished an independent task, and data interaction has adopted shared drive and unix territory socket to realize between each software module, helps the maintenance of software.Introduce the concrete function of each software module in detail below with reference to Fig. 6:
Host process module vsmain: host process is responsible for carrying out communication with central server, the state of each module is reported to server, and received the order that sends over from server, these orders is distributed to each software module goes to carry out.Equipment one powers on, and vsmain initiatively connects central server, and behind the server, initiatively the important information with this machine sends to server, as guid, infield, hardware information and the network parameter etc. of equipment in the connection.This process is called " facility registration ".In the registration process, can adopt the authentication mode of digital certificate between equipment and the server, guarantee the safety of communication between equipment and the server.After in the registration, vsmain sends heartbeat data packets at set intervals to server, and server thinks that equipment is still online, carries out the authentication of digital certificate simultaneously once more.In addition, the data interaction between each vsmain and the server all will all have a password through the authentication of password in each bar order.If the password in the order that server sends is not inconsistent, then vsmain abandons this order and disregards.Vsmain can read the locator data bag that the GPS module sends by the serial ports 1 of GM8180 each second, and becomes the packet of protocol compliant to send to central server these data transaction.The center service program can show the positional information of equipment on electronic chart in real time, to realize equipment is carried out the function of real-time location tracking.
Network media service module mediaserver: this is a program that the real-time audio and video data are provided for the user.Mediaserver starts the back and monitors at a fixing network port, and server obtains real-time audio, video data by this network port of connection device, will pass through digital certificate authentication and password authentication after server and mediaserver connect.Mediaserver obtains audio, video data from shared drive, will send to the server that has connected behind their bags.Under the situation of two-way video input, mediaserver determines according to the numbering of the video channel in the user command reading of data sends to the user from which piece shared drive.In addition, Mediaserver is reading video data from two shared drive zones simultaneously also, packs respectively, sends to corresponding user.Mediaserver can support maximum 6 users' video connection request simultaneously.
Video encoding module videoenc: this is a video coding service routine.Videoenc starts the back hardware coder is carried out initialization according to coded format that configures and method.Then, create shared drive, the space of depositing as media data.Videoenc circulates from the video acquisition mouth of GM8180 and obtains video data, data is put into encoder carry out encoding compression, and the real time video data after the compression is put into shared drive.GM8180 has two encoders, and therefore two videoenc program modules are moved simultaneously.Because the initiation parameter difference of two videoenc modules, independently of one another, and can not conflict mutually.The shared drive zone of being created also all is numbered according to the quantity of encoder, to make things convenient for other application programs the video data frame in the shared drive is read.
Picture recording module diskman: be responsible for creating local video file, the real-time storage video data is to memory device.Video recording adopts segmented mode to record, and the length of video file can be adjusted according to actual needs.Diskman is responsible for obtaining real time video data from shared drive, converts them to video file, leaves in the memory device, when memory device does not have enough spaces, deletes the oldest video file, realizes the circulation storage.In addition, diskman also is responsible for developing and managing the index file of video file.Video files all in the disk all have record in index, if a video file is deleted, the information in its indexed file also can be deleted.The user can come video file on the retrieval facility by inquiring about this index file.In addition, diskman supports the real-time storage of two-way video file, the video file of two video channels can be stored in respectively in the different paths.Diskman numbers according to video channel and creates video file and file index.
Transparent serial ports service module transcom: this is the bridge joint program of a network port and serial ports.Transcom starts the back and monitors at a fixing network port, after server is connected to this network port of equipment, sends the serial ports control data to transcom.Transcom receives after these data from the serial ports 2 of GM8180 data forwarding is gone out.
FTP service: FTP is provided login service.The user can login video server by the FTP mode, behind cipher authentication, and can download equipment daily record and video file.
Telnet service: remote login service is provided.The technical staff can pass through telnet mode Telnet equipment, and equipment is safeguarded and failure diagnosis.
Logger module: the service routine that the linux system carries, through being responsible for the operation information of each software module key of record after revising specially.
Customer parameter is provided with module: the interactive interface between equipment and the user.Realize by an embedded http service routine and cgi script at this interface.The user can use browser to come the configuration page of beaching accommodation, the parameter of equipment is configured and revises, as ip address, coded system, image parameter or the like.A configuration file is arranged in the equipment, and the relevant various parameters of all equipment operations have been preserved in the inside.After the user had revised device parameter with browser each time, cgi script will deposit amended parameter in the configuration file in, and the meeting restart facility, and equipment will be according to the operation of the parameter after the change.
Process monitoring module watch proc: the critical software module in the system is monitored, as vsmain, mediaserver and videoenc etc., guarantee that these software modules normally move, abnormality occurs, will restart this software module if find certain module.In addition, watch proc is an application program started at first behind the device start, and it is responsible for system is carried out initialization, and the loaded with hardware driver module starts each application program according to fixing sequencing then.Watch proc independent operating is not subjected to the influence of any other module, on the backstage each software module is monitored.
Watch proc, FTP service, Telnet service, parameter are provided with all independent operatings of these 4 programs of module, do not have data interaction with other application programs.Logger module receives the log information that all software modules are sent, and records in the journal file, and this functions of modules is also relatively independent, does not have interactive operation with other software modules.
Vsmain, also is responsible for carrying out data interaction between inner and other software modules as the host process module except being responsible for the external networking command communication of GTVS3024.Vsmain receives command packet from central platform server, then order is distributed to relevant software module.Each software module is all finished an independently task, and can receive the instruction that vsmain sends in real time, adjusts its operating state.Any one software module breaks down, and can not influence the normal operation of other software module.
Described radio access module is used for described two-way video server access of radio network, and possesses the wireless voice communication function.Radio access module can adopt the CPE323 module of letter prestige company, and it can effectively realize the interconnection of one road wired ethernet mouth and 340M wireless network, and possesses the wireless voice communication function.This module-external has a power interface, a RJ11 telephony interface, a RJ45 network interface and a radio-frequency antenna interface.As shown in Figure 7, the logic function unit of CPE323 comprises: RF signal receiving and s ending processing, the processing of Analog Baseband interface, digital baseband Digital Signal Processing and control and power management etc.The CPU primary processor adopts the dual core processor OMAP1621 of TI, and it has an ARM926 nuclear and a C55DSP nuclear, comprises interfaces such as JTAG, EMIFS, MPUIO, GPIO, MCBSP simultaneously.Wherein ARM nuclear is mainly finished the processing of signaling, the functions such as control of system, DSP nuclear mainly finish baseband signal the functions such as decomposition/synthesize of coding/decoding, spread spectrum/despreading, modulating/demodulating, data service and signaling.In the application of this product, video server links to each other with CPE323 by wired RJ45 network interface, and CPE323 inserts special-purpose 340M wireless network with video server.Power module is mainly finished the function to whole plate power supply, can provide multichannel suitable power supply according to the power reguirements of device on the plate, 3.3V/3V/1.5V.The input of external power source+5V, should+the 5V power supply produces the power supply of 4.4V voltage through the LDO of 1.5A.Radio frequency interface and data buffering module are finished digital-to-analogue, the analog-to-digital conversion of radio frequency analog signal, the generation of radio-frequency (RF) control signal, and the buffering of data and transmission comprise chip and circuit such as AD9861, LC4256.AD9861 finishes the mutual conversion of digital and analog signaling; CPLD chip LC4256 mainly finishes the buffering of data and to the controlled function of AD9861, is connected with OMAP by the EMIFF interface; The radio frequency control interface uses the MCSI2 interface of OMAP, is configured to four line SPI interface modes.Ethernet interface module is the interface of CPE and host computer transmission data, and the duplexing Ethernet interface that meets the IEEE802.3 standard is provided.The chip LAN91C93 that adopts is the FDX Ethernet interface chip of a non-pci interface, supports the IEEE802.3 standard, and the buffer RAM of 6K bytes is arranged in the sheet, supports the driving of the state/detection indicator light on the network interface.Therefore most of in the market Ethernet interface chips all adopt pci interface to control, and are not suitable for OMAP 1621, select the LAN91C93 that can directly conduct interviews by 16 position datawires and control line for use.This module not only has the function of Data Communication in Computer Networks, also has the function of wireless speech communication, and the user can link to each other telephone set with CPE323, call.The function of speech communication comprises intercommunication, grouies busy and group calling.In addition, CPE323 also has the function of service detach, and promptly network data transmission is separated with the professional strictness of speech communication.When the user calls, do not take the bandwidth of network communication.
The GPS module can adopt the GR87 module of HOLUX company, and this module has two serial ports, can export pps pulse per second signal, and the two-dimensional localization precision is about 10 meters.Its mode of operation is very simple, and the GPS navigation data of NMEA0138 agreement are initiatively exported in the back that powers on from serial ports.This inside modules has the lithium battery of 3V, can store ephemeris information and reach 500 hours.The GR-87 volume is very small and exquisite, is of a size of 25.4mm*25.4mm*7mm, and weight has only 8 grams.In addition, it is very power saving also, and operating current is 50mA only.Video server directly is connected by the cable of single 6pin with the GPS module.
The vehicle power module is made up of the DCDC module that 2 12V change 5V, and its model is YM12-12S05B, and each module maximum output current is 2.4A.The 5V power supply of a DCDC output is the wireless module power supply, and the 5V power supply of another DCDC output is given the network video server power supply of two-way.In addition, on power module, also have the power supply of one group of diode pair 12V input to carry out becoming after step-down is handled the direct-current power supply network switch use of output 9V.
Have 2 rows above the LED display panel, 5 of every rows are totally 10 LED lamps.5 indicator lights in upper strata: 1 power supply indicator is used for showing the power supply status of two-way video server, and 4 status indicator lamps are used for the operating state of display video server.5 indicator lights of lower floor: 1 power supply indicator is used for the power supply status of display radio module, and 4 wireless signal strength indicator lights are used for the communication signal intensity of display radio module.
The network switch selects for use 5 oral sexes of TPlink to change planes, and has 5 adaptive network interfaces of 10/100M.Its effect mainly can make between radio access module and the video server exactly by the mutual communication of network interface.Simultaneously, the tester also can utilize computer to carry out network communication with radio access module and video server respectively by this switch.
The utility model is a kind of wireless audio and video terminal of portable support high definition coding, can utilize the high-definition image and the double-directional speech data of 340M wireless network real-time Transmission D1 resolution 25 frame per seconds, and have the GPS positioning function.Summary of benefits is as follows:
● adopt special-purpose wireless communication module, real non line of sight transmission is supported to move;
● the classification of McVics wireless private network supporting business, but transferring voice, image and real time data;
● the support voice intercommunication, group busy, group calling;
● adopt the dedicated tone video coding chip, look type of coding and support Motion JPEG, MPEG4 and H.264, picture resolution is supported CIF (352 * 288), HD1 (720 * 288), D1 (720 * 576), and the highest coding frame per second is per second 25 frames;
● adopt chargeable high capacity cell power supply, the time of operating at full capacity was greater than 4 hours;
● volume is little easy to carry;
● the transmission rate of maximum downstream 2Mbps;
● transmitting power 27dBm EIRP.
Other like products on the market, its great advantage is video processor efficiently, the video coding coding of high definition, high wireless telecommunications bandwidth.At present, the like product that does not possess identical performance index on the market.
Though; the utility model clearly demonstrates by above embodiment and accompanying drawing thereof; yet under the situation that does not deviate from the utility model spirit and essence thereof; the person of ordinary skill in the field works as can make various corresponding variations and correction according to the utility model, but these corresponding variations and correction all should belong to the protection range of claim of the present utility model.
Claims (5)
1. vehicle carried wireless video terminal, it is characterized in that, comprise the two-way video server, GPS module, radio access module, the network switch that links to each other with described two-way video server respectively, the described network switch also links to each other with described radio access module, be the power module of described two-way video server, the power supply of the described network switch, the LED display panel that links to each other with described two-way video server, described radio access module.
2. vehicle carried wireless video terminal according to claim 1, it is characterized in that, described two-way video server comprises the SOC processor, two video coding chips, network interface chip for driving, a plurality of serial ports, memory interface, the power module that links to each other with described SOC processor respectively, described network interface chip for driving is network interface in succession, and described two video coding chips connect two video interfaces respectively;
Described two-way video server links to each other with described GPS module by one in described a plurality of serial ports, links to each other with described radio access module by described network interface.
3. vehicle carried wireless video terminal according to claim 2 is characterized in that, described SOC processor be used to realize two-way D1 resolution in real time H.264, the HD video coding of MPEG4 or Motion jpeg format.
4. vehicle carried wireless video terminal according to claim 1 is characterized in that, described radio access module is used for described two-way video server access of radio network, and possesses the wireless voice communication function.
5. vehicle carried wireless video terminal according to claim 4 is characterized in that, described radio access module also comprises power interface, telephony interface, network interface, radio-frequency antenna interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120007444 CN201937780U (en) | 2011-01-11 | 2011-01-11 | Vehicle-mounted wireless video terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120007444 CN201937780U (en) | 2011-01-11 | 2011-01-11 | Vehicle-mounted wireless video terminal |
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| CN201937780U true CN201937780U (en) | 2011-08-17 |
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| CN 201120007444 Expired - Fee Related CN201937780U (en) | 2011-01-11 | 2011-01-11 | Vehicle-mounted wireless video terminal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289406A (en) * | 2011-08-24 | 2011-12-21 | 深圳市万兴软件有限公司 | Parameter testing method and device |
| CN102780597A (en) * | 2012-07-13 | 2012-11-14 | 北京天地玛珂电液控制系统有限公司 | Comprehensive access point of working face |
| CN104536529A (en) * | 2014-12-26 | 2015-04-22 | 中经汇通电子商务有限公司 | Low-power-consumption heat data server |
| CN108496364A (en) * | 2017-06-21 | 2018-09-04 | 深圳市大疆创新科技有限公司 | Video transmission method, video processor, network processing unit and video transmission equipment |
-
2011
- 2011-01-11 CN CN 201120007444 patent/CN201937780U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289406A (en) * | 2011-08-24 | 2011-12-21 | 深圳市万兴软件有限公司 | Parameter testing method and device |
| CN102780597A (en) * | 2012-07-13 | 2012-11-14 | 北京天地玛珂电液控制系统有限公司 | Comprehensive access point of working face |
| CN102780597B (en) * | 2012-07-13 | 2015-04-29 | 北京天地玛珂电液控制系统有限公司 | Comprehensive access point of working face |
| CN104536529A (en) * | 2014-12-26 | 2015-04-22 | 中经汇通电子商务有限公司 | Low-power-consumption heat data server |
| CN108496364A (en) * | 2017-06-21 | 2018-09-04 | 深圳市大疆创新科技有限公司 | Video transmission method, video processor, network processing unit and video transmission equipment |
| WO2018232635A1 (en) * | 2017-06-21 | 2018-12-27 | 深圳市大疆创新科技有限公司 | Video transmission method, video processor, network processor, and video transmission device |
| CN108496364B (en) * | 2017-06-21 | 2020-10-16 | 深圳市大疆创新科技有限公司 | Video transmission method, video processor, network processor and video transmission equipment |
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