CN103002313A - Portable video signal testing equipment - Google Patents
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- CN103002313A CN103002313A CN2012103424478A CN201210342447A CN103002313A CN 103002313 A CN103002313 A CN 103002313A CN 2012103424478 A CN2012103424478 A CN 2012103424478A CN 201210342447 A CN201210342447 A CN 201210342447A CN 103002313 A CN103002313 A CN 103002313A
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Abstract
The invention provides portable video signal testing equipment comprising a testing module and an upper computer. Video signals are inputted to the testing module of the portable video signal testing equipment via a video interface. After being subjected to balanced-unbalanced conversion, the testing module can perform AD (analog digital) sampling according to the interface type and acquire video data, the data are fed back to the upper computer or recorded and stored before being fed back to the upper computer in real time via a portable interface, the upper computer displays, tests, analyzes the video data and performs man-machine interaction with the video data, the video data are reduced to the video signals after video coding or system conversion and outputted to external monitoring and displaying equipment. The portable video signal testing equipment can test extensive video signals of simulated composited videos, component videos and digital videos, has two modes of real-time testing and record playback, is in portable design and applicable to field test application of multiple kinds of video equipment like set-top boxes and video communication network.
Description
Technical field
The present invention relates to the test video signal technical field, proposed a kind of portable, the method for designing of the testing equipment of compatible analog composite, component and digital interface simultaneously.
Background technology
Audio and video equipment has been contained the extensively category such as TV, video camera, portable set.Current audio and video equipment is just experiencing from analog to digital, the major transformation from the SD to the high definition, and interface shape also develops into DVI, HDMI, DisplayPort numeral from CVBS analog composite, YPbPr component, and is following to wireless interconnected future development.The development of industry has proposed unprecedented requirement to standard, detection and measurement and calibration technology.Product detects and mainly to be divided into information source and the stay of two nights two classes, both comprised amplitude, phase place, regularly, the general parameter such as frequency, comprise that also colour bar, flat field, multiburst, K2T, slope etc. detect the dedicated video signal.The video measuring instrument mainly is the Related product of U.S. Tek Imtech at present, and factory's on-line monitoring mainly adopts the Related product of America NI company.Have following features:
(1) the video measuring instrument scheme of U.S. Tektronix company.
Comprise the VM700T for CVBS analog composite and the test of single-definition YPbPr component, and the VM6000 that is used for single-definition YPbPr component and high definition YPbPr test.If need Test coverage CVBS analog composite, single-definition YPbPr component and high definition YPbPr interface, need two kinds of instruments of VM700T and VM6000, all can not finish whole test assignments for independent any one.What wherein the decoding of the CVBS analog composite of VM700T was adopted is the non-integrated form scheme that is made of discrete devices such as filter, local oscillator, phase shifter, adders, the machine system volume is larger, on interface, only have RS232 low-speed communication interface, do not possess the high speed portable interfaces such as USB.Although VM6000 has GPIB and the interconnected ability of LAN main frame high speed, because its hardware platform is the TDS/DPO oscilloscope, therefore can not test CVBS analog composite interface, and equipment volume is larger, the work of can not cutting off the power supply also is not suitable for portable use.
(2) the video measuring instrument scheme of America NI company.
What the video measuring instrument scheme of America NI company adopted is the framework of " virtual instrument ".This scheme is separated hardware and software, and hardware components comprises independently video measurement box and general digitizer, and software section comprises driving and video analysis software.The video measurement box has the multiplexing and Trigger Function of external vision signal, can carry out multiplexing multiselect one to the CVBS analog mixed-signal, also can select 2 to select to enter digitizer test by 3 to the YPbPr component signal, simultaneously and have a triggering signal extract function.The effect of digitizer is to be video data with vision signal through the AD transform sampling.NI does not specially develop the above speed digitizer of 100Msample/s more than 3 passages for Video Applications, only have 5122 and 5,124 two kinds of 2 passage digitizers, therefore can not measure simultaneously 3 video channels of YPbPr component signal, can only once select 2 passages wherein to test, then two other passage be tested.The scheme of NI adopts the PXI framework, and therefore the work of can not cutting off the power supply also be not suitable for portable use.
The change of one " unification of three nets " is occuring in the current network communications field, it also is the fusion of broadcasting and television network, telegram telephone network and data communication network, the demand of video communication constantly increases, not only traditional radio and television have been upgraded to high definition TV, and the mobile video demand take mobile phone as representative is also in steady-state growth.The requirement of holding the transfer capability of the high definition video that can obtain everywhere of the large-scale sports race such as the Olympic Games, World Cup has become necessary.Therefore, field of video communication in future, adapt to various interface, various standards, the outfield portable video tester of various definition and data transfer rate has become the urgent need instrument of networking, for example test environment will comprise factory, test under laboratory and the outfield non-transformer electric power thus supplied, for example the interface aspect will comprise the CVBS analog composite, the YPbPr component is wireless to HDMI numeral and WLan, the video formats aspect will comprise PAL, NTSC, SDTV and HDTV, bandwidth and data transfer rate aspect will comprise 6MHz, 30MHz, 270Mbps, 1.485Gbps reach more high bandwidth and data transfer rate.
But regrettably, there is following problem in current video test instrument, all can not satisfy portable testing requirement, mainly has following problem:
(1) present exemplary video tester all can not fine adaptation field testing etc. portable use.The typical case needs Power supply such as VM700, VM6000, VideoMaster etc., does not have the energy storage devices such as battery, also is not optimized for portable application specially, all can not rely on the powered battery normal operation under powering-off state.
(2) power of test is all perfect not.VM700 can not test high definition video, VM6000 can not test the CVBS Analog Composite Video, VideoMaster can not test three component video signals of YPbPr and RGB component vide simultaneously, must test in twos, test first two passages and test two other passage again, the YPbPr video data of acquisition is difficult to guarantee to be same frame, with delegation.Chief reason is that the basis of video measurement is oscilloscope, but market is again less than oscilloscope, therefore the hardware platform of present video test instruments is substantially all developed at existing oscilloscope platform, from the beginning do not develop for video measurement specially, have unavoidably the shortcoming of oscilloscope platform self.For example VM700 adopts discrete device to realize the decoding of CVBS analog composite, but is difficult to take into account the test of high definition wideband video.VM6000 adopts the oscilloscope platform, has solved high definition wideband video test problem, but can not solve the decoding problem of CVBS analog composite.VideoMaster can be simultaneously to CVBS analog composite and YPbPr component interface testing, and compatible single-definition and high definition, but because the digitizer hardware platform that adopts only has 2 input interfaces, therefore can not realize the concurrent testing of YPbPr component interface 3 signals.(3) design optimization is not enough, and cost is higher, and networking capability is not enough.Present testing equipment mostly relies on the oscilloscope platform, does not remove redundancy feature, and special optimization is done in video measurement, therefore all has the higher problem of cost.Need the situation of many networking tests inapplicable for field testing.
In a word, existing various testing equipments exist variety of issue, all are not suitable for the application of portable field testing.
Summary of the invention
The object of the invention is to, a kind of portable video signal-testing apparatus is provided, simultaneously compatible CVBS analog composite, YPbPr and RGB component interface, and PAL, NTSC, the multiple types such as SDTV, HDTV, can under the field testing condition without battery, work, can form test network.
The invention has the beneficial effects as follows: possess the inner energy storage devices such as battery, can under power free field testing environment, use.The test video signal ability that possesses YPbPr and RGB component interface and CVBS analog composite interface, the power of test of compatible PAL, NTSC, the various video standards such as SDTV, HDTV, has High-Speed High-Accuracy AD more than 3 tunnel, can be simultaneously to the vision signal synchro measure of component interface, operation interface with man-machine close friend, the CVBS analog composite is had special-purpose ASIC decoding, programmable array FPGA decoding and software decode various ways, guaranteed decode precision.In a word, the invention solves the portable field testing problem of many interfaces Multi-standard video signal.
Description of drawings
Fig. 1 is portable video signal-testing apparatus system architecture schematic diagram;
Fig. 2 is component video signal handover module embodiment schematic diagram;
Fig. 3 is analog composite video signal handover module embodiment schematic diagram;
Fig. 4 is component vide standard identification module embodiment schematic diagram;
OE is the parity field synchronizing signal among Fig. 4.
BP is the burst synchronization signal among Fig. 4.
CS is the composite video synchronizing signal among Fig. 4.
VF is the video formats signal among Fig. 4.
VS is vertical synchronizing signal among Fig. 4.
HS is horizontal-drive signal among Fig. 4.
Fig. 5 is that filtering and single-ended differential conversion module are implemented schematic diagram;
Fig. 6 is that analog composite CVBS decoder module is implemented schematic diagram;
Fig. 7 is video measurement implement software schematic diagram;
Embodiment
Below, 1～7 describe portable video signal-testing apparatus of the present invention in detail with reference to the accompanying drawings.
Portable video signal-testing apparatus of the present invention comprises following modules:
Module 1: component vide interface switching module.
This module selects one the tunnel to test by either-or switch component vide YPbPr and the rgb signal of input.The embodiment of module 1 adopts switch chip to select 3 road component signals to test from 2 group of 6 road component signal as shown in Figure 1 among this embodiment, simultaneously to Y passage and G passage, select one the tunnel to carry out standard identification.Middle control programmable array FPGA arranges the passage that the channel setting switch chip is selected by serial or parallel.
Module 2: analog composite video signal handover module.
This module selects one the tunnel to test by many groups either-or switch the compound CVBS vision signal of multi-channel analog of input.The embodiment of module 2 as shown in Figure 2, this embodiment has shown that a kind of four select a solution, for analog composite CVBS vision signal, need not to select in addition synchronizing signal to extract passage.Middle control programmable array FPGA arranges the passage that the channel setting switch chip is selected by serial or parallel.
Module 3: component vide standard identification module.
This module identifies and exports the synchronously signal such as required row, field with component vide Y or the G passage vision signal of input by specific video Hz formula processed identification chip.The embodiment of module 3 as shown in Figure 3, video formats identification chip among this embodiment can be identified SDTV and the HDTV video of PAL, NTSC and 50Hz and 60Hz, the HDTV video formats comprises 720p, 1080i, 1080p, 2k digital movie, 4k digital movie etc., and the output synchronizing signal comprises that VF video formats signal, VS vertical synchronizing signal, HS are horizontal-drive signal.These signals can be used for clock synchronous by middle control programmable array FPGA and AD sampling chip and storage chip.
Module 4: filtering and single-ended differential conversion module.
This module is carried out filtering with the vision signal of input according to the video formats bandwidth, then enters single-ended differential transformation module the single-end video signals of inputting is transformed to differential signal output, and these differential signals are the following required signal format of AD sampling module.The embodiment of module 4 adopts special chip that vision signal is carried out filtering as shown in Figure 4 among this embodiment, filtering bandwidth can according in the instruction of control programmable array FPGA be set to 6MHz, 30MHz, 60MHz etc.Single-ended differential transformation module adopts special chip to realize.
Module 5: analog composite CVBS decoder module.
This module is decoded as the YCbCr video data with analog composite CVBS vision signal.The embodiment of module 5 as shown in Figure 5, this embodiment has two decoding channels:
Passage 1: analog composite CVBS video frequency switching module is selected one road signal, by the AD sampling module, obtains original waveform data by single-ended differential transformation, sends into middle control programmable array FPGA.Middle control programmable array is by the decoding of Verilog or VHDL logic realization analog composite CVBS signal.
Passage 2: the compound CVBS video of multi-channel analog, enter special-purpose analog composite CVBS decoding chip, decoded video data is sent into middle control programmable array FPGA.
Middle control programmable array FPGA has two kinds of embodiment to generate final YCbCr video data.
Embodiment 1: middle control programmable array FPGA selector channel 1 also is that the decoded data of Verilog or VHDL logic realization is as final decoded data output.
Embodiment 2: export as final decoded data with the splicing of passage 2 middle control programmable array FPGA selector channel 1.A kind of embodiment of splicing is: horizontal blanking part, the data of employing passage 1, the efficient sampling point part of every row, the data of employing passage 2.
Module 6: decoding digital video module.
This module is the YCbCr video data with decoded digital video signal.Digital video signal comprises HDMI, DisplayPort, DVI and WirelessHD wave point etc.A kind of embodiment of decoding digital video module adopts the integrated decoding chip of digital video, is the YCbCr video data with the decoded digital video signals such as HDMI of inputting.
Module 7: Video coding/system conversion module.
This module is vision signal with video data YCbCr recompile, shows for external-connection displayer and monitor.
A kind of embodiment of this module is to be the VGA interface video signal with the video data YCbCr of same input source coding, system conversion.
A kind of embodiment of this module is that the video data YCbCr down conversion with different input sources is the image of source images 1/n size, is an image output again with these image combinings, simultaneously the caption information such as output video source on image.
Module 8: memory module.
This module is stored video data YCbCr, so that playback is used.A kind of embodiment of this module is: middle control programmable array FPGA arranges the information such as storage zero-time and length, adopts portable notebook to use DDR2 and DDR3 memory grain or module as storage medium.
Module 9: portable interface module.
Communicating by letter of middle control programmable array FPGA in this module realization test module and host computer.Host computer will be tested control command and by the portable interface module test module be arranged, and test module is test result, and for example video data YCbCr is uploaded to host computer and carries out further video measurement.
A kind of embodiment of this module is: adopt USB interface and integrated portable interface chip.Other portable interface also comprise GPIB, Wifi, WLan, IEEE1394, Lan etc.
Module 10: upper computer software module.
This module realizes the driving of portable interface in host computer, and video measurement application layer software function.
A kind of embodiment of this module is: realize that in host computer USB interface drives, realize simultaneously the video measurement application layer software in host computer.
A kind of embodiment of video measurement application layer software as shown in Figure 6.One of feature of this embodiment is to adopt the integral panels arrangement of three subfields, and wherein upper left is the oscillography module, can display waveform and carry out cursor and set.Upper right is the control panel module, can carry out instrument initialization, portable interface setting, standard selection etc.One of feature of control panel is to adopt a knob, rather than a plurality of knob, realizes that video choosing row, video scaling, video translation, level and vertical cursors move, and the knob pattern is controlled by the switch of the many groups on the panel.
Portable video signal-testing apparatus of the present invention, the embodiment of function correlated characteristic is as follows:
1, have simultaneously or partly test video signal and video monitor output function.
The test video signal function refers to test whole row or a few row of certain TV signal.The video monitor output function refers to and video data can be reduced to vision signal, shows tested vision signal by video interface output and at display device.
A kind of embodiment of this function is: the video AD decoding obtains the YCbCr video data of YPbPr or RGB component vide, integrated decoding chip obtains the YCbCr video data of CVBS Analog Composite Video, when middle control programmable array FPGA returned video data to host computer, the user can watch in real time by display and monitor the video image in different video source.Specific implementation is: the user arranges the Image Mosaics mode by portable interfaces such as USB, by middle control programmable array FPGA the Image Mosaics in different video source is become one-frame video data, and add the caption information such as video source, be transformed to VGA or HDMI interface through Video coding/system conversion module, export to display or monitor.
2, have simultaneously or partly real-time video test and two kinds of test functions of recording and playback.
" real-time video test function " refers to that host side sets the initial of video acquisition module and stop gathering row by portable interface, and the test video signal module all gathers the every frame of vision signal, passes back in real time main frame and is presented on the software interface." recording and playback function " refers to that host side passes through portable interface setting section or whole timing informations, comprise zero-time, termination time, time-delay and total acquisition time, the test video signal module is recorded in the storage medium on the module the vision signal continuous acquisition, gathers partly or entirely to pass back to main frame after finishing again and be presented on the software interface.
A kind of embodiment of this function is: the user arranges test module by the status control module on the video measurement software of host computer and adopts " real-time video test " pattern or " recording and playback " pattern.If user selection is " real-time video test " pattern, then also need to arrange initial and stop collection and go, or gather line number etc. at every turn, video measurement software arranges instruction with these and sends middle control programmable array FPGA to by portable interface, the test video signal module is carried out the AD sampling according to arranging to the every frame of vision signal, and the video data that obtains passes back in real time main frame by portable interface and is presented on the software interface.If user selection is " recording and playback " pattern, then also need to arrange part or all of timing information, comprise zero-time, termination time, time-delay and total acquisition time etc., video measurement software arranges instruction with these and sends middle control programmable array FPGA to by portable interface, the test video signal module is carried out not frame losing continuous acquisition and is recorded in the memory module the every frame of vision signal according to arranging, and gathers to arrange according to the user after finishing partly or entirely to pass back to main frame and be presented on the software interface again.
3, configurable sliceable CVBS Analog Composite Video test function.
For CVBS analog composite interface, equipment of the present invention possesses three decoding channels:
After decoding channels 1:AD collects the Wave data of effective row, video data is returned to the testing software module of host computer, decoding obtains the YCbCr data to this module to the CVBS Analog Composite Video by software.
After decoding channels 2:AD collects the Wave data of effective row, video data is sent into middle control programmable array FPGA, decoding obtains the YCbCr data to the decoding algorithm of realizing with Verilog or VHDL among the FPGA to the CVBS Analog Composite Video, and then returns to host computer.
Decoding channels 3: decoding obtains the YCbCr data to multichannel CVBS Analog Composite Video to adopt application-specific integrated circuit (ASIC), and then returns to host computer.
The CVBS decoded portion is characterised in that: for the test of CVBS analog composite interface, the user not only can be configured to any one in these 3 kinds of decoding channels, and can adopt wherein the test result of two decoding channels to carry out " splicing ", to reach optimized test result.
A kind of embodiment of " splicing " is: with the video data that decoding channels 1 obtains, the video data that obtains with decoding channels 3 splices.The video data of the efficient sampling point in each video line adopts the result of passage 3, and the video data of field blanking, line blanking period is provided by passage 1.
Below will compare, verify feature and the advantage of other test video signal equipment on portable video signal-testing apparatus of the present invention and the market:
1, drainage pattern frame by frame.
Portable video testing equipment of the present invention has " real-time video test " and " recording and playback " two kinds of patterns, and no matter which kind of pattern all has the ability that not frame losing gathers frame by frame to vision signal.The difference of these two kinds of patterns is that " real-time video test " only tests select row and the passback in every frame, and " recording and playback " pattern gathers the every provisional capital in every frame, is stored in the memory device in the test module and then passback.Situation about just recognizing at present, other test video signal equipment does not possess this function on the market, reason is the main flow testing equipment on the market, based on the hardware structure of sampling oscilloscope, operation principle is to rebuild waveform after the different sampling points of a fixed response time in the different cycles of cyclical signal are taken a sample again mostly.Since every from sampling period and inconsistent, the video waveform of therefore rebuilding is expert at, all can not guarantee consistency on the field.And portable video testing equipment of the present invention, to all again designs of the hardware structures such as bottom AD sampling module, and done special optimization for Video Applications, belong to broadband real time sample mode of operation at hardware, also namely surpass the bandwidth of video signal at analog bandwidth, and adopt over-sampling on the sampling rate, surpass the frequently speed AD sampling of certain multiple of video formats point.Then test the video data that obtains and guarantee it is to derive from same, same delegation.
2, recording playback mode.
Portable video testing equipment of the present invention has " recording and playback " mode of operation, and this pattern gathers the every provisional capital in every frame, is stored in the memory device in the test module and then passback.Situation about just recognizing at present, other test video signal equipment does not possess this function on the market, and reason is the main flow testing equipment on the market, mostly based on the hardware structure of sampling oscilloscope, scarcely has the record wave energy.And, since every from sampling period and inconsistent, even therefore by reconstruction video frame behind the record ripple, owing to all can not guarantee consistency on the row, field, so it is also little to record the ripple meaning.And portable video testing equipment of the present invention, guaranteed that the video data that test obtains is to derive from same, same delegation, therefore can rebuild row, field, frame according to recorder data, and guarantee the consistency in source, guarantee the consistency of reconstructed image and raw video signal image.This function is for the test video quality, and the encoding and decoding damage is significant.
3, configurable sliceable CVBS decoding channels.
For CVBS analog composite interface, equipment of the present invention possesses three decoding channels, and can realize different test effects by the splicing of efficient sampling point in every row and blanking interval video data.Situation about just recognizing at present, other test video signal equipment on the market adopts traditional hardware decoding mostly, or a kind of in the novel software decode scheme, the equipment that does not possess simultaneously multiple decoding scheme and can splice.The problem of traditional hardware decoding scheme is to adopt a large amount of discrete analogue devices to build decode system, and equipment volume is huge, and framework falls behind, and is unsuitable for portable Test Application.And the equipment of employing new software decoding scheme, mostly the framework at virtual instrument makes up, and by digitizer vision signal AD is taken a sample first, is then decoded by FPGA or host computer.Consider complexity and the FPGA capacity of realization, this decoding scheme is realized also imperfect to the decoding of the standards such as PAL and NTSC usually, only realized basic function and part standard, thereby decoding effect is usually poor than the effect that shows on the main flow TV, can not realize " What You See Is What You Get ".And equipment of the present invention, in decoding channels 3, adopt application-specific integrated circuit ASIC that multichannel CVBS Analog Composite Video is decoded, because the ASIC that selects has represented current state-of-the-art CVBS Analog Composite Video decoding effect, similar with the main flow high-end TV on the market, therefore guaranteed that the effect that shows on decoding effect and the main flow high-end TV is similar, realized " What You See Is What You Get ".And this equipment has also been realized the splicing of multiple decoded result, and more convenient user is decoding channels and analysis vision signal problem relatively.
4, the component test is in the consistency of time-domain.
Portable video testing equipment of the present invention has 4 AD sampling passages in the test module, can walk abreast simultaneously and carry out the AD collection, has guaranteed that YPbPr or each passage of RGB component video signal are in the consistency of time-domain.Situation about just recognizing at present, other test video signal equipment on the market needs inner video switch switch mostly, can only once test simultaneously 2 passages, can not once test simultaneously 3 passages.Reason is the main flow testing equipment on the market, mostly based on the hardware structure of each existing sampling oscilloscope of company, mostly only has the digitizer of the above speed of 2 path 10 0Msample/s, does not use the design bottom hardware for video measurement specially.Portable video testing equipment of the present invention, to all again designs of the hardware structures such as bottom AD sampling module, and done special optimization for Video Applications, design has initially just been considered the problem of component vide 3 channel parallels tests, test module has 4 road AD parallel acquisition passages, therefore can accomplish the test of component vide 3 channel parallels.The significant advantage of this feature is embodied on the time-domain dependence test, such as test events such as communication channel delay.
5, software interface.
Portable video testing equipment of the present invention, the host side testing software, implementing one of feature is to adopt Microsoft Windows
RC Plus Plus on the platform is write, and has guaranteed system effectiveness and real-time, and provides second development interface.And on the market based on the testing equipment of virtual instrument, mostly adopt the Virtual Instrument Development too developments such as Labview, system effectiveness and real-time will far lag behind the testing software that C Plus Plus is write.Other facilities and equipments on the market based on DOS or (SuSE) Linux OS exploitation, far are inferior to equipment of the present invention on graphical operation interface and ease for use.
The host side testing software implements one of feature and is to have second development interface, exposes applied software development interface API to the user with the form of dynamic or static link library.
The host side testing software implements one of feature and is to adopt the multithreading Concurrent Display video data such as thread pool and carries out the video data analysis.
The host side testing software, implementing one of feature is to adopt a knob control, the convergent-divergent of multiplexing realization choosing row, cursor position and view size.
The host side testing software, implementing one of feature is to adopt paging Tab control, realizes the placement of video measurement project on the interface.
6, portable design.
Portable video testing equipment of the present invention, implementing one of feature is that test module adopts Ni-MH battery or lithium battery as energy storage device.When external power supply is arranged, adopt the external power supply power supply, simultaneously battery is charged.During without external power supply, adopt powered battery.
In sum, the present invention proposes a kind of portable video signal-testing apparatus, this equipment is made of test module and host computer, can test the extensive vision signal that comprises analog composite, component vide and digital video, have two kinds of patterns of real-time testing and wave record playback test, portable design is applicable to comprise that the various video equipment of set-top box etc. and the field testing of video communication network use.
More than be in order to make those of ordinary skills understand the present invention; and the detailed description that the present invention is carried out; but can expect; within not breaking away from the scope that claim of the present invention contains, can also make other changes and modifications, these variations and revising all in protection scope of the present invention.
Claims (10)
1. portable video signal-testing apparatus, vision signal is inputted the test module of this equipment by video interface, test module is after balance-non-equilibrium conversion, carry out the AD sampling according to interface type, obtain video data, return main frame after by portable interface data being returned main frame or record ripple storage in real time, main frame shows video data and test analysis and man-machine interaction again; Video data outputs to external supervision and display device carrying out being reduced to vision signal after Video coding or the system conversion.It is characterized in that: comprise test module and Test Host two parts, test module is responsible for video signal collective and analysis, and Test Host is responsible for test result analysis and man-machine interaction.Adopt the above high speed portable interface of 5Mbps to carry out data interaction between test module and Test Host two parts.The high speed portable interface comprises USB, GPIB, Wifi, WLan, IEEE1394, Lan etc.
2. test video signal module according to claim 1 is characterized in that:
While or part comprise the test function of following video formats and interface.Testable video interface comprises YPbPr component, RGB component, CVBS analog composite, HDMI numeral, DVI is digital, DisplayPort is digital, wireless video interface and the digital visual interface in future.Video formats comprises the video formats of regulation in PAL, NTSC, SECAM, SDTV, HDTV and GB " SJ-T/11333 apparatus of digital television receiving interface specification the 7th part: YPBPR Analog Component Video signaling interface " and " SJ-T/11332 apparatus of digital television receiving interface specification the 6th part: the RGB simulation primary video signal interface ".
3. test video signal module according to claim 1 is characterized in that:
Have simultaneously or partly test video signal and video monitor output function.The test video signal function refers to test whole row or a few row of certain TV signal.The video monitor output function refers to and video data can be reduced to vision signal, shows tested vision signal by video interface output and at display device.
4. test video signal module according to claim 1 is characterized in that:
Have simultaneously or partly real-time video test and two kinds of test functions of recording and playback." real-time video test function " refers to that host side sets the initial of video acquisition module and stop gathering row by portable interface, and the test video signal module all gathers the every frame of vision signal, passes back in real time main frame and is presented on the software interface." recording and playback function " refers to that host side passes through portable interface setting section or whole timing informations, comprise zero-time, termination time, time-delay and total acquisition time, the test video signal module is recorded in the storage medium on the module the vision signal continuous acquisition, gathers partly or entirely to pass back to main frame after finishing again and be presented on the software interface.
5. test video signal module according to claim 1 is characterized in that:
For component signal, for example YPbPr and rgb interface adopt directly that analog-to-digital conversion AD module directly gathers vision signal more than 3 the tunnel, rather than through gathering 2 the tunnel first after multiplexing, again to other one the road or two-way gather.
6. test video signal module according to claim 1 is characterized in that:
Before the AD acquisition module, adopt balance-non-equilibrium conversion module that the single-end video signals of input is transformed to differential signal.The AD sampling module has 12 above sampling precisions and the above peak sample speed of 200Msps.
7. test video signal module according to claim 1 is characterized in that:
For CVBS analog composite interface, have simultaneously or partly two kinds of test functions of software decode and application-specific integrated circuit (ASIC) decoding.After software decode refers to that AD collects the Wave data of effective row, by certain algorithm in the test video signal module programmable array or host software in decode video data by certain algorithm.The application-specific integrated circuit (ASIC) decoding refers to adopt certain dedicated video decoding chip, the CVBS vision signal is directly decoded without additional AD be video data.
8. test video signal module according to claim 1 is characterized in that:
For CVBS analog composite interface, has the splicing function of the video data that obtains of original waveform data and application-specific integrated circuit (ASIC) decoding.This kind test function refers to that the video data of the efficient sampling point in each video line is obtained by the application-specific integrated circuit (ASIC) decoding, and the video data of field blanking, line blanking period is obtained by the video data that AD gathers.
9. test video signal host side method of testing according to claim 1 is characterized in that:
Adopt multithreading Concurrent Display video data and carry out the video data analysis.
Have second development interface, expose API to the user with the form of dynamic or static link library.
Adopt a knob control, the convergent-divergent of multiplexing realization choosing row, cursor position and view size.
Adopt paging Tab control, realize the placement of video measurement project on the interface.
10. test video signal module according to claim 1 is characterized in that:
Even in without the situation of external power supply, also can work within a certain period of time.Both can adopt the energy storage device in the module, for example storage battery is powered, also can be directly by external power of alterating and direct current power supply.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103905817A (en) * | 2014-04-17 | 2014-07-02 | 中国电子科技集团公司第三研究所 | Automatic video measuring system based on LabVIEW and VideoMASTER |
| CN103944982A (en) * | 2014-04-15 | 2014-07-23 | 中国建筑股份有限公司 | Data collecting and controlling device and method for heterogeneous sensor network |
| CN107343194A (en) * | 2017-03-21 | 2017-11-10 | 天津市康凯卓讯软件科技有限公司 | A kind of IPTV broadband products automated testing method and device |
| CN114143573A (en) * | 2021-12-06 | 2022-03-04 | 北京泰瑞特检测技术服务有限责任公司 | Digital video measuring device |
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| CN201491179U (en) * | 2009-08-28 | 2010-05-26 | 聪泰科技开发股份有限公司 | Hand-held image detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2366858Y (en) * | 1998-05-18 | 2000-03-01 | 刘立龙 | Multi-functional radio testing and reparing instrument |
| CN201491179U (en) * | 2009-08-28 | 2010-05-26 | 聪泰科技开发股份有限公司 | Hand-held image detector |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944982A (en) * | 2014-04-15 | 2014-07-23 | 中国建筑股份有限公司 | Data collecting and controlling device and method for heterogeneous sensor network |
| CN103905817A (en) * | 2014-04-17 | 2014-07-02 | 中国电子科技集团公司第三研究所 | Automatic video measuring system based on LabVIEW and VideoMASTER |
| CN103905817B (en) * | 2014-04-17 | 2016-01-13 | 中国电子科技集团公司第三研究所 | Based on the video automatic measuring system of LabVIEW and VideoMASTER |
| CN107343194A (en) * | 2017-03-21 | 2017-11-10 | 天津市康凯卓讯软件科技有限公司 | A kind of IPTV broadband products automated testing method and device |
| CN107343194B (en) * | 2017-03-21 | 2019-08-09 | 天津市康凯卓讯软件科技有限公司 | A kind of IPTV broadband product automated testing method and device |
| CN114143573A (en) * | 2021-12-06 | 2022-03-04 | 北京泰瑞特检测技术服务有限责任公司 | Digital video measuring device |
| CN114143573B (en) * | 2021-12-06 | 2023-06-20 | 北京泰瑞特检测技术服务有限责任公司 | Digital video measuring device |
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Application publication date: 20130327 |