CN106303373A - A kind of Gbit wireless transmitting system based on 3D video flowing - Google Patents
A kind of Gbit wireless transmitting system based on 3D video flowing Download PDFInfo
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Abstract
The present invention provides a kind of Gbit wireless transmitting system based on 3D video flowing, including: the 3D video flowing wireless base station apparatus connected by wireless signal and 3D video flowing radio receiver, the frequency range of described wireless signal is the ISM band of 5.8G；Described 3D video flowing wireless base station apparatus includes: 3D video stream synchronization unit, video encoding unit, a Gbit wireless transmission unit, the first display input block, the first key control unit and the first Power Management Unit；Described 3D video flowing radio receiver includes: the 2nd Gbit wireless transmission unit, video decoding unit, the second display input block, the second key control unit, second source administrative unit.The present invention can realize wirelessly transmitting 3D high-definition video signal, and the present invention uses battery to power, it is simple to carries out 3D video frequency program live transmission at the environment such as stadiums, field condition.
Description
Technical field
The present invention relates to wireless communication technology field, particularly the technical field of video transmission in wireless communication field, a kind of Gbit wireless transmitting system based on 3D video flowing.
Background technology
The two-way high-definition digital video signal of 3D video camera output is the standard 2D video flowing by different angle shots, every circuit-switched data speed reaches the Gbps order of magnitude, exported by two independent HD-SDI interface synchronizations in camera side, by special vision cable be transmitted to the nonlinear editing system of far-end carry out storing, editing and processing and broadcast.In actual applications, the distance between shooting ground and backstage receiving processing system is distant, directly transmits maximum by wired vision cable and is only capable of reaching about 200 meters, and transmission can only pass through fiber-optic transfer more at a distance.
, there are two subject matters in actual use in wired cable and fiber-optic transfer.First, at floor, personnel are the most, and wired transmission lines is easily damaged and breaks down.Second, due to the needs of shooting angle, 3D video camera needs frequent change location, and this makes wire transmission mode very inconvenient on using.
Therefore, during 3D shooting, need a kind of radio transmitting device, directly the high-definition video signal of 3D video camera is transferred in the reception equipment of far-end, to substitute existing wire transmission mode.Radio transmission apparatus based on 3D video is little in the market, the most all uses WiFi technology, and because the high-definition signal code check of 3D video is the highest, common WiFi technology transmission range is comparatively short, the most not can exceed that the transmission range of 50 meters.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of Gbit wireless transmitting system based on 3D video flowing, little, apart from short problem for solving wireless way for transmitting 3D high-definition video signal capacity in prior art.
For achieving the above object and other relevant purposes, the present invention provides a kind of Gbit wireless transmitting system based on 3D video flowing, described Gbit wireless transmitting system based on 3D video flowing to include: the 3D video flowing wireless base station apparatus connected by wireless signal and 3D video flowing radio receiver；Described 3D video flowing wireless base station apparatus includes the Gbit wireless transmission unit for sending 3D video flowing；Described 3D video flowing radio receiver includes the 2nd Gbit wireless transmission unit for receiving 3D video flowing from a described Gbit wireless transmission unit；The frequency range of described wireless signal is the ISM band of 5.8G.
As a preferred embodiment of the present invention, described 3D video flowing wireless base station apparatus also includes: described 3D video flowing wireless base station apparatus also includes: 3D video stream synchronization unit, for 3D video flowing is carried out synchronization process；Video encoding unit, is connected with described 3D video stream synchronization unit, for encoding the 3D video flowing through synchronization process；First display input block, is used for providing display and input；First key control unit, is connected, for being controlled above-mentioned each unit with described 3D video stream synchronization unit, described video encoding unit, a Gbit wireless transmission unit and the first display input block respectively；First Power Management Unit, is connected with described 3D video stream synchronization unit, described video encoding unit, a Gbit wireless transmission unit, the first display input block and described first key control unit, respectively for providing power supply for above-mentioned each unit.
As a preferred embodiment of the present invention, described 3D video flowing radio receiver also includes: described 3D video flowing radio receiver also includes: video decoding unit, for being decoded the 3D video flowing received；Second display input block, is used for providing display and input；Second key control unit, is connected, for being controlled above-mentioned each unit with described video decoding unit, the 2nd Gbit wireless transmission unit and the second display input block respectively；Second source administrative unit, is connected with described video decoding unit, the 2nd Gbit wireless transmission unit, the second display input block and described second key control unit, respectively for providing power supply for above-mentioned each unit.
As a preferred embodiment of the present invention, the physical layer data frame structure of a described Gbit wireless transmission unit and described 2nd Gbit wireless transmission unit is up-downgoing asymmetric sky time-frequency-signal extension-OFDM framework.
As a preferred embodiment of the present invention, the base band transmission of a described Gbit wireless transmission unit and described 2nd Gbit wireless transmission unit uses empty time-frequency-signal extension-OFDM framework that multi-antenna mode automatically switches.
As a preferred embodiment of the present invention, the via node of a described Gbit wireless transmission unit and described 2nd Gbit wireless transmission unit uses system architecture and the protocol architecture having semi Radio Resource right of distribution.
As a preferred embodiment of the present invention, the radio-frequency front-end of a described Gbit wireless transmission unit and described 2nd Gbit wireless transmission unit uses automated power to control.
As it has been described above, a kind of based on 3D video flowing the Gbit wireless transmitting system of the present invention, have the advantages that
1, in the present invention, the 3D video flowing wireless base station apparatus that can be connected by wireless signal and 3D video flowing radio receiver, the frequency range of described wireless signal is the ISM band of 5.8G, realize wirelessly transmission 3D high-definition video signal, efficiently solve wireless way for transmitting 3D high-definition video signal capacity in prior art little, apart from short problem.
2, Gbit wireless transmitting system uses the data of super-broadband tech transmission 3D photographic equipment, it is achieved that high power capacity, low delay, the transmission of resistance to interference, reaches requirement of real time, makes 3D technology reach live level.
3, the present invention has stronger versatility and practicality.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of a kind of based on 3D video flowing the Gbit wireless transmitting system of the present invention.
Physical layer data frame structure of eating dishes without rice or wine in one embodiment of the Gbit wireless transmitting system based on 3D video flowing that Fig. 2 is shown as the present invention.
Transmitting set structured flowchart in one embodiment of the 3 Gbit wireless transmitting systems based on 3D video flowing that Fig. 3 is shown as the present invention.
Radio receiver architecture block diagram in one embodiment of the Gbit wireless transmitting system based on 3D video flowing that Fig. 4 is shown as the present invention.
Via node demodulation repeater system structure in one embodiment of the Gbit wireless transmitting system based on 3D video flowing that Fig. 5 is shown as the present invention.
Element numbers explanation
1 Gbit wireless transmitting system based on 3D video flowing
11 3D video flowing wireless base station apparatus
111 3D video stream synchronization unit
112 video encoding units
113 first key control units
114 the oneth Gbit wireless transmission unit
115 first display input blocks
116 first Power Management Unit
3D video flowing radio receiver described in 12
121 the 2nd Gbit wireless transmission unit
122 second key control units
123 video decoding units
124 second display input blocks
125 second source administrative units
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be understood other advantages and effect of the present invention easily by the content disclosed by this specification.The present invention can also be carried out by the most different detailed description of the invention or apply, and the every details in this specification can also carry out various modification or change based on different viewpoints and application under the spirit without departing from the present invention.
It is an object of the invention to provide a kind of Gbit wireless transmitting system based on 3D video flowing, little, apart from short problem for solving wireless way for transmitting 3D high-definition video signal capacity in prior art.The principle of a kind of based on 3D video flowing the Gbit wireless transmitting system of the present invention described in detail below and embodiment, make those skilled in the art need not creative work and be i.e. appreciated that a kind of based on 3D video flowing the Gbit wireless transmitting system of the present invention.
As shown in Figure 1, the present embodiment provides a kind of Gbit wireless transmitting system based on 3D video flowing, described Gbit wireless transmitting system 1 based on 3D video flowing includes: 3D video flowing the wireless base station apparatus 11 and 3D video flowing radio receiver 12 connected by wireless signal, wherein, the frequency range of described wireless signal is the ISM band of 5.8G.
The main application characteristic of described 3D video wireless transmission system is: 3D video flowing wireless base station apparatus 11 receives the high definition video steaming of 3D video camera, after synchronization, compression coding, wirelessly it is sent to the 3D video flowing radio receiver 12 of far-end, in 3D video flowing radio receiver 12, recover original 3D video flowing by video decoding and use to corresponding video editing input system.3D video flowing wireless base station apparatus 11 and 3D video flowing radio receiver 12 uses modularized design, and the design of partial function unit hardware is identical.
Specifically, described 3D video flowing wireless base station apparatus 11 includes that 3D video stream synchronization unit 111, video encoding unit the 112, the oneth Gbit wireless transmission unit 114, first show input block the 115, first key control unit 113 and the first Power Management Unit 116.
3D video stream synchronization unit 111 is for carrying out synchronization process to 3D video flowing；The input interface of described 3D video stream synchronization unit 111 includes two HD-SDI interfaces (High Definition Serial Digital Interface high definition serial digital interface).
nullIn the present embodiment，3D video stream synchronization unit 111 uses high performance large scale integrated circuit FPGA (programmable logic array) to be kernel processor chip，The Spartan6 family chip of the signal behavior Xilinx company of FPGA，Model is XC6SLX100T，External DDR2 memory buffer video stream data，DDR2 chip selects the MT47H64M16NF-25E chip of the 1Gbit capacity of Micron company，HD video input interface chip uses the GS1674 chip of the superior performance of Semtech company，This chip supports the HS-SDI interface of multi tate，And the reception equalization function of high speed signal is provided，Ensure received signal quality when long line connects，The output interface chip of HD video uses the GS1578A chip of Semtech company，Chip support HD-SDI long distance driver，The Long line transmission of signal has been effectively ensured，2 tunnel high definition input signals，Realized the synchronization process of 2 tunnel high definitions by complicated programming in logic and algorithm inside FPGA，And the mode (side-by-side) using left and right combined and spliced the 2 tunnel high definition models carries out closing road and is integrated into a road high-definition signal output，To video encoding unit 112.The physical electrical interface of HD-SDI uses the bnc connector of 75 ohm, facilitates the interconnection between unit.
Video encoding unit 112 is connected with described 3D video stream synchronization unit 111, for encoding the 3D video flowing through synchronization process；Video encoding unit 112 is realized by the DaVinci dsp chip of TI, and chip external DDR3 memory chip realizes data buffer storage and processes.Dsp chip is connected with 3D video video stream lock unit by HD-SDI interface chip.The 3D video flowing of synchronized process, carries out coded treatment in coding module, and Video coding supports H.264 coding and lossless coding.
Video encoding unit 112 uses the up-to-date multi-media processing chip TMS320DM8168 of TI company for processing chip；
External 4 DDR3 memorizeies realize the caching process of video data, and chip selects the MT41J128M8JP-125 chip of the 1Gbit capacity of Micron company, and the DDR3 total capacity of video encoding unit 112 is 512MB, meets the caching code requirement of 3D HD video data；In the flash of the SPI interface that the boot program of DM8168 chip is saved in outside, after boot success, program version is loaded in the internal memory of DDR3 by PCIe interface, it is achieved the quick operation of video encoding unit 112, and SPI Flash selects the W25X25 chip of Winbond company to realize；The input interface chip of HD video selects the GV7601 chip of Semtech company to realize.
The oneth Gbit wireless transmission unit 114 3D video flowing after sending coding；Specifically, oneth Gbit wireless transmission unit 114 uses the high-performance wireless processor chips of Qualcomm to realize, can select to install omnidirectional antenna or the beam antenna of different gains, corresponding demand is met according to different scenes, it is connected by network interface between oneth Gbit wireless transmission unit 114 with the first key control unit 113, POE is used to power, it is not necessary to independent external power supply.
Specifically, in the present embodiment, the core processor chip of the oneth Gbit wireless transmission unit 114 uses the AR7240 chip of high pass, this chip uses the MIP 24K of dominant frequency 400MHz to be kernel, it is integrated with Ethernet exchanging function, external DDR chip and SPI Flash program storage chip, is connected with radio frequency processing chip AR9280 by PCIe interface, radio frequency processing chip AR9280 is connected by RF circuit and exterior antenna, carries out the transmitting-receiving transmission of wireless data.RF main circuit power amplifier to be included, low-noise reception amplifier and RF matching network.
The physical layer data frame structure of a described Gbit wireless transmission unit 114 is up-downgoing asymmetric sky time-frequency-signal extension-OFDM framework.In a described Gbit wireless transmission unit 114, two descending sub frames are the most only comprised in 20 subframes in one frame, to each camera node (mobile station) broadcast corresponding control Business Stream and TDD scheduling of resource is carried out for mobile control room (base station), simultaneously to controlling Business Stream and the coded system of resource scheduling information employing low bit-rate and relatively low order of modulation, thus improve transmission success rate and ensure QoS；Remaining sub-frame resources according to scheduling of resource instruction uploaded videos stream business and controls Business Stream for each camera node.
Specifically, as in figure 2 it is shown, the physical layer data frame structure of a described Gbit wireless transmission unit 114 is up-downgoing asymmetric sky time-frequency-signal extension-OFDM framework, a length of 10ms of a frame, it is divided into 20 subframes, each subframe 0.5ms.Subframe is the elementary cell of individual transmission.Each subframe is made up of 5.6us protection interval, 68.2us leading character sequence (8 OFDM symbol) and 426.2us data sequence (50 OFDM symbol).Two descending sub frames are the most only comprised in 20 subframes in one frame, to each camera node (mobile station) broadcast corresponding control Business Stream and TDD scheduling of resource is carried out for mobile control room (base station), simultaneously to controlling Business Stream and the coded system of resource scheduling information employing low bit-rate and relatively low order of modulation, thus improve transmission success rate and ensure QoS；Remaining sub-frame resources according to scheduling of resource instruction uploaded videos stream business and controls Business Stream for each camera node.
The base band transmission of a described Gbit wireless transmission unit 114 uses empty time-frequency-signal extension-OFDM framework that multi-antenna mode automatically switches.A described Gbit wireless transmission unit 114 uses time division duplex (Time Division Duplex, TDD) pattern, by time division multiplex and OFDM, by transmittability total for system flexibly, be sequentially assigned to numerous users of different demand, and provide the service quality such as bandwidth, time delay (Quality of Service, QoS) to ensure for each user.Time-frequency-signal extension-OFDM uses environment self-adaption mechanism, according to channel condition, disturbed condition and business demand etc. during work, is adaptively adjusted systematic parameter, allocating system resource, it is thus achieved that the performance of optimization.
As shown in Figure 3, the transmitter of a described Gbit wireless transmission unit 114 uses time-frequency-signal extension-OFDM framework, first the data of different user carry out low-density checksum (Low Density Parity Check, LDPC) code coding and symbol maps.Symbol maps one of optional employing tri-kinds of modulation systems of QPSK, 16-QAM and 64-QAM.System, according to situations such as different business demands, channel condition, resource distribution, selects suitable encoding scheme and modulation system for each user, and can be adjusted adaptively according to the change of channel circumstance.In system, self adaptation Multiplexing module uses OFDMA technology, is assigned to the data after interleaving treatment on different subcarriers be transmitted.Data stream carry out respectively inverse fast Fourier transformed (Inverse Fast Fourier Transform, IFFT) and and go here and there (Parallel-to-Serier, P/S) conversion after, be input to the hollow mapping block of pseudorandom.System uses multiple-input and multiple-output MIMO multi-antenna technology, utilizes multiple antennas improve power system capacity and obtain diversity gain.
As it is shown in figure 5, the via node of a described Gbit wireless transmission unit 114 uses system architecture and the protocol architecture having semi Radio Resource right of distribution.The via node of a described Gbit wireless transmission unit 114 is system architecture and the protocol architecture of limited (semi) Radio Resource right of distribution, by utilizing demodulation forward mode without carrying out the feature of channel decoding, it is substantially reduced relay process time delay, thus improves the link circuit self-adapting performance of multihop system.Design via node carries out the scheme of RRM within the scope of authority, ensure network and the relative stability of interference, make the functional entity relevant to radio open close proximity to access network simultaneously, thus timely respond to the change of wireless channel, improve system spectrum utilization rate.
A described Gbit wireless transmission unit 114, by utilizing demodulation forward mode without carrying out the feature of channel decoding, is substantially reduced relay process time delay, thus improves the link circuit self-adapting performance of multihop system.Design via node carries out the scheme of RRM within the scope of authority, ensure network and the relative stability of interference, make the functional entity relevant to radio open close proximity to access network simultaneously, thus timely respond to the change of wireless channel, improve system spectrum utilization rate.The demodulation reradiating repeater docking collection of letters number is demodulated, remodulates and forwarding operation.The system that demodulation forwards completes demodulation and forwards, and via node only need to carry out channel estimation, the most positive inverse-Fourier transform, and aforesaid operations is all carried out in units of OFDM symbol, therefore can operate with offset parallel, therefore from receiving forwarding without processing delay.System uses static double bounce resource distribution mode, and corresponding signaling and agreement are simple.According to this demodulation pass-through mode, equivalent signal-to-noise ratio end to end can be obtained, such that it is able to be demodulated forward mode link circuit self-adapting end to end.
The radio-frequency front-end of a described Gbit wireless transmission unit 114 uses automated power to control.Power consumption analysis and optimization, radio-frequency front-end automated power that a described Gbit wireless transmission unit 114 is realized by Baseband algorithms control (APC), it is achieved the Miniaturization Design of baseband system and the miniaturization of radio-frequency front-end.
Gbit wireless transmitting system uses the data of super-broadband tech transmission 3D photographic equipment, it is achieved that high power capacity, low delay, the transmission of resistance to interference, reaches requirement of real time, makes 3D technology reach live level.
First display input block 115 is used for providing display and input；Described first display input block 115 uses and touches TFT-LCD display screen, specifically, display part uses LED-backlit TFT-LCD 7 display screen of low-power consumption, it is connected with using LVDS interface between key control unit, importation uses the electric resistance touch screen of technical grade, realizes input by USB interface and key control unit mutual.
Specifically, in described first display input block 115, display screen uses the true color TFT-LCD display screen of 7 1024*600 resolution, and use the LVDS interface of standard between the first key control unit 113, display screen uses the LED-backlit design of low-power consumption, LED-backlit is under software control, within the time set, screen does not input and output function, can be automatically switched off backlight to save electric energy.Importation use technical grade 4 wire resistive touchscreen design, can under low temperature and high relative humidity environment reliably working, the hardware driving interface of touch screen is USB interface, is realized the input function of touch recognition by software.
First key control unit 113 is connected, for being controlled above-mentioned each unit with described 3D video stream synchronization unit 111, described video encoding unit the 112, the oneth Gbit wireless transmission unit 114 and the first display input block 115 respectively；Described first key control unit 113 is mounted with embedded OS, such as, Windows XP Embedded System, by different application programs, manage correlation module.
First key control unit 113 is realized by the control module meeting COM-E standard, and the processor of module uses x86 compatible type CPU.First key control unit 113 design achieves 7 PCIE interfaces, 8 USB interface, and 1 network interface is for the interconnection with external unit module.
First key control unit 113 uses CPU module design compatible for x86, and connected by PCI-Express (Peripheral Component Interconnect-Express, high speed outer assembly interconnecting interface) interface between video encoding unit 112.
Connected by network interface between a described Gbit wireless transmission unit 114 and described first key control unit 113, specifically, connected by the network interface of 100M.The power supply of wireless module uses POE (Power Over Ethernet, POE) mode to power.
nullSpecifically，First key control unit 113 uses the computer module meeting COM Express 2.0 standard，7 PCIEx1 interfaces of module support carry out the extension of various function，1 gigabit networking interface，8 USB2.0 interfaces，4 USB3.0 interfaces，Two LVDS show interface，4 SATA hard disc interfaces，2 RS232/RS422 interfaces，CPU selects the i3 of Intel as required，i5，I7 series polycaryon processor，DDR memory bar designs in module，Support the SODIMM slot of 2 204 pins，The maximum internal memory supporting maximum 16GB，The module of the first key control unit 113 selects technical grade COM Express 2.0 module SOM-5892 of Yan Hua company，Interconnected with other functional unit by base plate by high speed connector，The hard disc apparatus of the first key control unit 113 uses highly reliable、Technical grade，SATA interface DOM (the disk On Module) electronic hard disc of low-power consumption，Capacity 64GB，Support encryption function，Prevent from illegally copying.The key control unit CPU being wirelessly transferred dispensing device of 3D video selects the i3-3127UE low power processor of 2 cores, overall power 17W.
With described 3D video stream synchronization unit 111, described video encoding unit the 112, the oneth Gbit wireless transmission unit 114, first, first Power Management Unit 116 shows that input block 115 and described first key control unit 113 are connected for providing power supply for above-mentioned each unit respectively.First Power Management Unit 116 is controlled by independent processor management, it is achieved the power supply to unit.First Power Management Unit 116 supports that the power supply of 3 tunnel independences inputs, by different priority to system power supply.
Described first Power Management Unit 116 uses lithium battery to be powered.Specifically, described first Power Management Unit 116 is controlled powering on of other unit by MSP430 microprocessor, the input of power supply provides 3 road redundant powers, being that external power adapter power supply is powered respectively, external back-up battery is powered and internal battery is powered, and 3 road power supplys use priority power supply mode, in the presence of when 3 road power supplys while, the priority of power supply adaptor is the highest, and external cell priority is taken second place, and internal cell priority is minimum.
nullFurther，Described first Power Management Unit 116 is made up of Micro Energy Lose processor MSP430F1232 chip and power supply two priority classes chip LTC4417，LTC4417 chip realizes the input of 3 road power supplys and controls，External power adapter can be realized power、External connection battery is powered and between internal battery powers by predetermined priority power supply to the device，The priority of power supply adaptor is the highest，External connection battery priority is taken second place，Internal cell priority is minimum，In the presence of when three-way power while，The power supply power supply to the device the highest by priority，So can ensure that the equipment maximum operating time when battery is powered，Two back-to-back connection PMOS，Realize the anti-reverse of power supply and supply voltage low time reverse-filling function，LTC4417 chip is by monitoring three groups of voltages，By default overvoltage and under-voltage threshold，When the power supply of high one-level priority occur overvoltage or under-voltage time，Automatically switch on the power supply of low one-level priority，The power up of high priority normally after auto switching on the power supply doing priority，Thus realize the automatic switchover between three-way power，MSP430F1232 processor is responsible for monitoring the state of power supply，By the input interface between kernel control module，CPU by power work state notifying key control unit，Intuitively indicated on display interface by software.By MSP430F1232 processor by detecting the shift knob state of equipment, control the work of M3-ATX power module and realize powering on and closing electric control of system power supply with closing.M3-ATX power module is the Based Intelligent Control power module meeting Mini-ATX power standard of miniBox company, input voltage range 6V～24V, module maximum output 125W power, + 12V ,+5V are provided, + 5Vstandby, 4 groups of power supplys such as+3.3V, it is ensured that the first key control unit 113 and the power supply of each external unit.
Described 3D video flowing radio receiver 12 includes: the 2nd Gbit wireless transmission unit 121, video decoding unit the 123, second key control unit 122, second show input block 124 and second source administrative unit 125.
2nd Gbit wireless transmission unit 121 is by eating dishes without rice or wine to be connected with a described Gbit wireless transmission unit 114, for receiving the 3D video flowing that a described Gbit wireless transmission unit 114 sends；Specifically, 2nd Gbit wireless transmission unit 121 uses the high-performance wireless processor chips of Qualcomm to realize, can select to install omnidirectional antenna or the beam antenna of different gains, corresponding demand is met according to different scenes, it is connected by network interface between 2nd Gbit wireless transmission unit 121 with the second key control unit 122, POE is used to power, it is not necessary to independent external power supply.
Specifically, in the present embodiment, the core processor chip of the 2nd Gbit wireless transmission unit 121 uses the AR7240 chip of high pass, this chip uses the MIP 24K of dominant frequency 400MHz to be kernel, it is integrated with Ethernet exchanging function, external DDR chip and SPI Flash program storage chip, is connected with radio frequency processing chip AR9280 by PCIe interface, radio frequency processing chip AR9280 is connected by RF circuit and exterior antenna, carries out the transmitting-receiving transmission of wireless data.RF main circuit power amplifier to be included, low-noise reception amplifier and RF matching network.
The physical layer data frame structure of described 2nd Gbit wireless transmission unit 121 is up-downgoing asymmetric sky time-frequency-signal extension-OFDM framework.In described 2nd Gbit wireless transmission unit 121, two descending sub frames are the most only comprised in 20 subframes in one frame, to each camera node (mobile station) broadcast corresponding control Business Stream and TDD scheduling of resource is carried out for mobile control room (base station), simultaneously to controlling Business Stream and the coded system of resource scheduling information employing low bit-rate and relatively low order of modulation, thus improve transmission success rate and ensure QoS；Remaining sub-frame resources according to scheduling of resource instruction uploaded videos stream business and controls Business Stream for each camera node.
Specifically, as in figure 2 it is shown, the physical layer data frame structure of described 2nd Gbit wireless transmission unit 121 is up-downgoing asymmetric sky time-frequency-signal extension-OFDM framework, a length of 10ms of a frame, it is divided into 20 subframes, each subframe 0.5ms.Subframe is the elementary cell of individual transmission.Each subframe is made up of 5.6us protection interval, 68.2us leading character sequence (8 OFDM symbol) and 426.2us data sequence (50 OFDM symbol).Two descending sub frames are the most only comprised in 20 subframes in one frame, to each camera node (mobile station) broadcast corresponding control Business Stream and TDD scheduling of resource is carried out for mobile control room (base station), simultaneously to controlling Business Stream and the coded system of resource scheduling information employing low bit-rate and relatively low order of modulation, thus improve transmission success rate and ensure QoS；Remaining sub-frame resources according to scheduling of resource instruction uploaded videos stream business and controls Business Stream for each camera node.
As shown in Figure 4, the Baseband Receiver end of described 2nd Gbit wireless transmission unit 121, first carry out the hollow inverse mapping of pseudorandom according to the local hollow sequence of mapping of pseudorandom, from reception antenna, select suitable reception antenna, obtain receiving data stream.Reception signal is after serial to parallel conversion, then carries out FFT to frequency domain.At frequency domain, first channel estimation is carried out, the estimated value of the channel matrix obtaining each subcarrier carries out least mean-square error (MMSE) detection followed by the result that channel is estimated, obtain the reception data on each subcarrier of each road, demultiplexed after be assigned on the receiving branch of each user.
The base band transmission of described 2nd Gbit wireless transmission unit 121 uses empty time-frequency-signal extension-OFDM framework that multi-antenna mode automatically switches.Described 2nd Gbit wireless transmission unit 121 use time division duplex (Time Division Duplex,
TDD) pattern, by time division multiplex and OFDM, by transmittability total for system flexibly, be sequentially assigned to numerous users of different demand, and provide the service quality such as bandwidth, time delay (Quality of Service, QoS) to ensure for each user.Time-frequency-signal extension-OFDM uses environment self-adaption mechanism, according to channel condition, disturbed condition and business demand etc. during work, is adaptively adjusted systematic parameter, allocating system resource, it is thus achieved that the performance of optimization.
As it is shown in figure 5, the via node of described 2nd Gbit wireless transmission unit 121 uses system architecture and the protocol architecture having semi Radio Resource right of distribution.The via node of described 2nd Gbit wireless transmission unit 121 is system architecture and the protocol architecture of limited (semi) Radio Resource right of distribution, by utilizing demodulation forward mode without carrying out the feature of channel decoding, it is substantially reduced relay process time delay, thus improves the link circuit self-adapting performance of multihop system.Design via node carries out the scheme of RRM within the scope of authority, ensure network and the relative stability of interference, make the functional entity relevant to radio open close proximity to access network simultaneously, thus timely respond to the change of wireless channel, improve system spectrum utilization rate.
Described 2nd Gbit wireless transmission unit 121, by utilizing demodulation forward mode without carrying out the feature of channel decoding, is substantially reduced relay process time delay, thus improves the link circuit self-adapting performance of multihop system.Design via node carries out the scheme of RRM within the scope of authority, ensure network and the relative stability of interference, make the functional entity relevant to radio open close proximity to access network simultaneously, thus timely respond to the change of wireless channel, improve system spectrum utilization rate.The demodulation reradiating repeater docking collection of letters number is demodulated, remodulates and forwarding operation.The system that demodulation forwards completes demodulation and forwards, and via node only need to carry out channel estimation, the most positive inverse-Fourier transform, and aforesaid operations is all carried out in units of OFDM symbol, therefore can operate with offset parallel, therefore from receiving forwarding without processing delay.System uses static double bounce resource distribution mode, and corresponding signaling and agreement are simple.According to this demodulation pass-through mode, equivalent signal-to-noise ratio end to end can be obtained, such that it is able to be demodulated forward mode link circuit self-adapting end to end.
The radio-frequency front-end of described 2nd Gbit wireless transmission unit 121 uses automated power to control.Power consumption analysis and optimization, radio-frequency front-end automated power that described 2nd Gbit wireless transmission unit 121 is realized by Baseband algorithms control (APC), it is achieved the Miniaturization Design of baseband system and the miniaturization of radio-frequency front-end.
Video decoding unit 123 is connected with described second key control unit 122, for being decoded the 3D video flowing received；It is attached by PCI-Express interface between described second key control unit 122 and described video decoding unit 123.The output interface of described video decoding unit 123 is a HDMI.
In the present embodiment, the output interface of video decoding unit 123 is 1 HDMI (High Definition Multimedia Interface high-definition media interface).Chip uses chip design, realizes the decoding function of video by running different software.
Specifically, video decoding unit 123 is realized by the DaVinci dsp chip of TI, the 3D video flowing that main decoding process receives, the coded format of self-adapting detecting video, the video flowing of H.264 coding or wireless encoding is recovered primary signal, and original 3D video stream is received system to non-linear editing by the HDMI embedded by chip.
Further, video decoding unit 123 uses the multi-media processing chip TMS320DM8168 chip of TI and the DDR memory of outside and SPI flash chip, video decoding output, the output of two-way HDMI HD video is provided, the HDMI transmitter offer that one route 8168 chips oneself are integrated, separately lead up to Silicon Image company SiL9024 extension, the parallel video delivery outlet of SiL9024 with DM8168 chip is connected.For supporting hot plug and the ESD protection of HDMI, at each HDMI output interface, level shift and ESD by HDMI protect chip TPD12S520 to realize the safeguard function of port.Video decoding algorithm controls to be realized by the video processing hardware kernel within DM8168 by software.
Second display input block 124 is used for providing display and input；Described second display input block 124 uses and touches TFT-LCD display screen.Specifically, display part uses LED-backlit TFT-LCD 7 display screen of low-power consumption, is connected with using LVDS interface between key control unit, and importation uses the electric resistance touch screen of technical grade, realizes input by USB interface and key control unit mutual.
Specifically, in described second display input block 124, display screen uses the true color TFT-LCD display screen of 7 1024*600 resolution, and use the LVDS interface of standard between the second key control unit 122, display screen uses the LED-backlit design of low-power consumption, LED-backlit is under software control, within the time set, screen does not input and output function, can be automatically switched off backlight to save electric energy.Importation use technical grade 4 wire resistive touchscreen design, can under low temperature and high relative humidity environment reliably working, the hardware driving interface of touch screen is USB interface, is realized the input function of touch recognition by software.
Second key control unit 122 is connected, for being controlled above-mentioned each unit with described video decoding unit the 123, the 2nd Gbit wireless transmission unit 121 and the second display input block 124 respectively；Described second key control unit 122 is mounted with embedded OS, such as, Windows XP Embedded System, by different application programs, manage correlation module.
Second key control unit 122 is realized by the control module meeting COM-E standard, and the processor of module uses x86 compatible type CPU.Second key control unit 122 design achieves 7 PCIE interfaces, 8 USB interface, and 1 network interface is for the interconnection with external unit module.
Second key control unit 122 uses CPU module design compatible for x86, and connected by PCI-Express (Peripheral Component Interconnect-Express, high speed outer assembly interconnecting interface) interface between video decoding unit 123.
Connected by network interface between described second key control unit 122 and described 2nd Gbit wireless transmission unit 121, specifically, connected by the network interface of 100M.The power supply of wireless module uses POE (Power Over Ethernet, POE) mode to power.
nullSpecifically，Second key control unit 122 uses the computer module meeting COM Express 2.0 standard，7 PCIEx1 interfaces of module support carry out the extension of various function，1 gigabit networking interface，8 USB2.0 interfaces，4 USB3.0 interfaces，Two LVDS show interface，4 SATA hard disc interfaces，2 RS232/RS422 interfaces，CPU selects the i3 of Intel as required，i5，I7 series polycaryon processor，DDR memory bar designs in module，Support the SODIMM slot of 2 204 pins，The maximum internal memory supporting maximum 16GB，The module of the second key control unit 122 selects technical grade COM Express 2.0 module SOM-5892 of Yan Hua company，Interconnected with other functional unit by base plate by high speed connector，The hard disc apparatus of the second key control unit 122 uses highly reliable、Technical grade，SATA interface DOM (the disk On Module) electronic hard disc of low-power consumption，Capacity 64GB，Support encryption function，Prevent from illegally copying.The CPU of the core key control unit of 3D video flowing radio transceiver device selects 4 powerful core i7-3612QE processors, overall power 35W.Support the reception decoding process of maximum 2 road 3D videos.
With described video decoding unit the 123, the 2nd Gbit wireless transmission unit 121, second, second source administrative unit 125 shows that input block 124 and described second key control unit 122 are connected for providing power supply for above-mentioned each unit respectively.Described second source administrative unit 125 uses lithium battery to be powered.
Second source administrative unit 125 is controlled by independent processor management, it is achieved the power supply to unit.Second source administrative unit 125 supports that the power supply of 3 tunnel independences inputs, by different priority to system power supply.
Described second source administrative unit 125 uses lithium battery to be powered.Specifically, described second source administrative unit 125 is controlled powering on of other unit by MSP430 microprocessor, the input of power supply provides 3 road redundant powers, being that external power adapter power supply is powered respectively, external back-up battery is powered and internal battery is powered, and 3 road power supplys use priority power supply mode, in the presence of when 3 road power supplys while, the priority of power supply adaptor is the highest, and external cell priority is taken second place, and internal cell priority is minimum.
nullFurther，Described second source administrative unit 125 is made up of Micro Energy Lose processor MSP430F1232 chip and power supply two priority classes chip LTC4417，LTC4417 chip realizes the input of 3 road power supplys and controls，External power adapter can be realized power、External connection battery is powered and between internal battery powers by predetermined priority power supply to the device，The priority of power supply adaptor is the highest，External connection battery priority is taken second place，Internal cell priority is minimum，In the presence of when three-way power while，The power supply power supply to the device the highest by priority，So can ensure that the equipment maximum operating time when battery is powered，Two back-to-back connection PMOS，Realize the anti-reverse of power supply and supply voltage low time reverse-filling function，LTC4417 chip is by monitoring three groups of voltages，By default overvoltage and under-voltage threshold，When the power supply of high one-level priority occur overvoltage or under-voltage time，Automatically switch on the power supply of low one-level priority，The power up of high priority normally after auto switching on the power supply doing priority，Thus realize the automatic switchover between three-way power，MSP430F1232 processor is responsible for monitoring the state of power supply，By the input interface between kernel control module，CPU by power work state notifying key control unit，Intuitively indicated on display interface by software.By MSP430F1232 processor by detecting the shift knob state of equipment, control the work of M3-ATX power module and realize powering on and closing electric control of system power supply with closing.M3-ATX power module is the Based Intelligent Control power module meeting Mini-ATX power standard of miniBox company, input voltage range 6V～24V, module maximum output 125W power, + 12V ,+5V are provided, + 5Vstandby, 4 groups of power supplys such as+3.3V, it is ensured that described second source administrative unit 125 is to the second key control unit 122 and the power supply of each external unit.
In sum, the Gbit wireless transmitting system based on 3D video flowing of the present invention has reached following beneficial effect: in the present invention, the 3D video flowing wireless base station apparatus that can be connected by wireless signal and 3D video flowing radio receiver, the frequency range of described wireless signal is the ISM band of 5.8G, realize wirelessly transmission 3D high-definition video signal, and the present invention uses battery to power, it is simple to carry out 3D video frequency program live transmission at the environment such as stadiums, field condition；Gbit wireless transmitting system uses the data of super-broadband tech transmission 3D photographic equipment, it is achieved that high power capacity, low delay, the transmission of resistance to interference, reaches requirement of real time, makes 3D technology reach live level, and the present invention has stronger versatility and practicality.So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from disclosed spirit and technological thought such as, must be contained by the claim of the present invention.
Claims (7)
1. a Gbit wireless transmitting system based on 3D video flowing, it is characterised in that described Gbit based on 3D video flowing is wireless
Transmission system includes: the 3D video flowing wireless base station apparatus connected by wireless signal and 3D video flowing radio receiver；
Described 3D video flowing wireless base station apparatus includes the Gbit wireless transmission unit for sending 3D video flowing；Described 3D
Video flowing radio receiver includes the 2nd Gbit for receiving 3D video flowing from a described Gbit wireless transmission unit
Wireless transmission unit；The frequency range of described wireless signal is the ISM band of 5.8G.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that described 3D video
Stream wireless base station apparatus also includes:
3D video stream synchronization unit, for carrying out synchronization process to 3D video flowing；
Video encoding unit, is connected with described 3D video stream synchronization unit, for the 3D video flowing through synchronization process
Encode；
First display input block, is used for providing display and input；
First key control unit, respectively with described 3D video stream synchronization unit, described video encoding unit, a Gbit
Wireless transmission unit and the first display input block are connected, for being controlled above-mentioned each unit；
First Power Management Unit, respectively with described 3D video stream synchronization unit, described video encoding unit, a Gbit
Wireless transmission unit, the first display input block and described first key control unit are connected, for carrying for above-mentioned each unit
Power supply source.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that described 3D video
Stream radio receiver also includes: video decoding unit, for being decoded the 3D video flowing received；
Second display input block, is used for providing display and input；
Second key control unit, aobvious with described video decoding unit, the 2nd Gbit wireless transmission unit and second respectively
Show that input block is connected, for above-mentioned each unit is controlled；
Second source administrative unit, respectively with described video decoding unit, the 2nd Gbit wireless transmission unit, the second display
Input block and described second key control unit are connected, for providing power supply for above-mentioned each unit.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that a described Gbit
When the physical layer data frame structure of wireless transmission unit and described 2nd Gbit wireless transmission unit is up-downgoing asymmetric sky
Frequently-signal extension-OFDM framework.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that a described Gbit
The base band transmission of wireless transmission unit and described 2nd Gbit wireless transmission unit use that multi-antenna mode automatically switches empty time
Frequently-signal extension-OFDM framework.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that a described Gbit
The via node of wireless transmission unit and described 2nd Gbit wireless transmission unit uses semi Radio Resource right of distribution
System architecture and protocol architecture.
Gbit wireless transmitting system based on 3D video flowing the most according to claim 1, it is characterised in that a described Gbit
The radio-frequency front-end of wireless transmission unit and described 2nd Gbit wireless transmission unit uses automated power to control.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681334A (en) * | 2018-05-10 | 2018-10-19 | 上海乾达农业科技有限公司 | A kind of device for the unmanned machine operation supervision of agricultural plant protection |
| CN110519531A (en) * | 2019-09-11 | 2019-11-29 | 华东师范大学 | Multi-path high-definition video distribution formula processing equipment |
-
2015
- 2015-05-19 CN CN201510254024.4A patent/CN106303373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681334A (en) * | 2018-05-10 | 2018-10-19 | 上海乾达农业科技有限公司 | A kind of device for the unmanned machine operation supervision of agricultural plant protection |
| CN110519531A (en) * | 2019-09-11 | 2019-11-29 | 华东师范大学 | Multi-path high-definition video distribution formula processing equipment |
| CN110519531B (en) * | 2019-09-11 | 2024-03-22 | 华东师范大学 | Multipath high-definition video distributed processing equipment |
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Application publication date: 20170104 |