CN2653822Y

CN2653822Y - Image monitor with combined digital and analogue technology

Info

Publication number: CN2653822Y
Application number: CN 200320102416
Authority: CN
Inventors: 周贤伟
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2003-10-29
Filing date: 2003-10-29
Publication date: 2004-11-03
Anticipated expiration: 2013-10-29

Abstract

The utility model relates to a picture monitoring device which is the combination of the digital and the simulation techniques and is used for the monitoring of the safety on the spot and for the recording of the happening processes of the cases. The utility model consists of an inputting device, a video capture board, a service port computer, a tripod head, a sensor, a tripod head decoding control board and a drive circuit. The video inputting device is connected with the PCI bus of a service port computer through the video capture board; the tripod head and the sensor are connected, through the drive circuit, with the tripod head decoding control board which is again connected with the service port computer. The inputting video of a CCD collection camera compresses and codes the signals through the video capture, the picture adjustment and the picture capture modules, and leads the valid data into the service port computer and achieves long distance transmission of the video signals following the 1 VP transmission standard, without the adoption of any optical fiber and the amplifier, therefore, the clearance and interference immunity of the pictures are highly guaranteed and the safety and the accuracy of the video signals in transmissions are achieved.

Description

The picture control device that numeral combines with analogue technique

Technical field

The utility model relates to a kind of supervising device, refers in particular to the picture control device that the numeral of a kind of high-quality, long Distance Transmission vision signal combines with analogue technique.

Background technology

Development along with watch-dog and image processing techniques, people generally in the business hall, surrounding environment, important channel, means of transportation, secret department and public place etc. need the zone installing picture control safety device that monitors, with monitoring site safety and record case generating process.Existing picture control safety device generally is to utilize service end microcomputer and television monitoring technology, alert to each monitored point is monitored, communication port by supervising device is delivered to upper service end microcomputer to the alert signal, utilize multimedia technology that multiple information such as text, figure, sound, image are carried out integrated treatment then, on host computer, show alert at last in multimedia mode.Can also the automatically switch camera of monitoring TV starts camera by drive signal, and to the alarm region record of making a video recording, and supervision on TV has the zone of alert.This multimedia monitoring warning device has solved the problem of image and sound, and it belongs to a kind of analogue means, and the transmission speed of this device is slow, and image definition is not enough.Though the existing digital monitoring device appearance that utilizes software to realize or add multiple function, its fail safe is relatively poor, and stability is not strong, and cost of equipment is expensive.Said apparatus all is single digital device or analogue means, adds some warning functions.Along with the high-technicalization of means of crime and the high speed development of modern communication technology, it can not satisfy the demand of actual use.People need be in bank, civil aviaton, station, cubicle and biotope etc. the zone safer monitor and alarm unit is set, simultaneously monitoring picture transmitting speed, accuracy, anti-interference, definition and its fail safe are had higher requirement.

Summary of the invention

The purpose of this utility model is: the picture control device that provides a kind of numeral to combine with analogue technique, its can high definition, high-speed, anti-interference, the transmission of safety and precise ground is alert puts monitoring image and implement Realtime Alerts.

Be that the picture control device that a kind of numeral combines with analogue technique is constituted by looking phase input equipment, video frequency collection card, service end microcomputer, The Cloud Terrace, transducer, The Cloud Terrace decoding control card and drive circuit for reaching the technical scheme that this purpose takes.Look the phase input equipment and link to each other by the pci bus of video frequency collection card with the service end microcomputer, The Cloud Terrace and transducer join by drive circuit and The Cloud Terrace decoding control card, and The Cloud Terrace decoding control card is connected with the service end microcomputer.

Looking the phase input equipment is ccd video camera or digital camera.

Drive circuit selects a circuit U B5/UB6, reverser U1A/U4A/U3A, 8D trigger UA1/UA2/UA3/UA4/UA5/UA6/UA7 to be constituted by comparator UB2, decoder UB1 or door U6A, NOR gate U7A, latch UB3/UB4,16.The 7 position datawire D0-D7 of IAS bus J4 link to each other with the Q output of 8D trigger UA1/UA3/UA4 respectively, and join with the D trigger end of 8D trigger UA2/UA5/UA6/UA7 and low four inputs of latch UB4.The 7 bit address line A3-A9 of IAS bus J4 link to each other with one group of input of comparator UB2, the sheet of output that it is corresponding and decoder UB1 selects input to join, the 3 bit address line A0-A2 of IAS bus J4 link to each other with the input of decoder UB1, a road of decoder UB1 output is connected to the control end of latch UB3 through NOR gate U7A, the D trigger end of four outputs in the end of latch UB4 and latch UB3 joins, and the output of latch UB3 selects a circuit U B5/UB6 to be connected with audio frequency, video inputs in the terminals J0/J3 through 16.Another road of decoder UB1 output through or door U6A gating 8D trigger UA1/UA3/UA4, and be connected to 24 groups of transducers by reverser U1A/U4A/U3A and terminals J1.The another road of decoder UB1 output outputs to the data of 8D trigger/UA1/UA3/UA4 storage The Cloud Terrace and looks input equipment mutually with 8D trigger UA5/UA6/UA7 through NOR gate U7A.The output of 8D trigger UA2 is connected to indicator light and video tape recorder switch by terminals J2.

Operation principle of the present utility model is by three modules such as video capture, image adjustment and grabgrafs, gathers the input video of ccd video camera, and adopts suitable compressed encoding standard to carry out compressed encoding, and active traffic is introduced service end microcomputer inside.In this device, compression of video data adopts H.264 compression algorithm, pure hardware-compressed, and it is few to take cpu resource, and failure rate is low, and can be according to the variation of application scenario and environment, the dynamic coding parameters such as picture quality, frame per second of revising in compression process.

The utility model has the advantages that: owing to utilize new and high technologies such as modern digital communication, Based Intelligent Control and service end computer management, digital device is combined with analogue means realizing the safety precaution function aspects, accomplish under the condition that does not adopt optical fiber and amplifier, the vision signal extra long distance to be transmitted with the 1VP transmission standard.Owing to adopted numeral and analog-converted technology, guarantee the definition and the anti-interference of image in high quality again, realized the safety of vision signal and accurately transmission.

Description of drawings

Fig. 1 is the utility model structured flowchart.

Fig. 2 is a video acquisition schematic diagram in the utility model.

Fig. 3 is a video frequency collection card structural representation in the utility model.

Fig. 4 is a sensor circuit schematic diagram in the utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is done to describe in further detail:

As shown in Figure 1, the picture control device that a kind of numeral combines with analogue technique is by being constituted by video frequency collection card, service end microcomputer, The Cloud Terrace, transducer, The Cloud Terrace decoding control card and the drive circuit of DS-400xH as the ccd video camera of looking the phase input equipment, model.Ccd video camera links to each other by the pci bus of video frequency collection card with the service end microcomputer, every ccd video camera is installed on the The Cloud Terrace, No. 24 transducers are arranged on the The Cloud Terrace, and The Cloud Terrace and transducer join by drive circuit and The Cloud Terrace decoding control card, and The Cloud Terrace decoding control card is connected with the service end microcomputer.

As Fig. 2, shown in Figure 3, what the utility model adopted is analog ccd video camera, then at first to cross the video interface and the processing module of device through this, from multichannel input, select one by one one the road or a few road carry out the A/D conversion, and stored after being compressed into the mpeg standard data.This just need carry out video acquisition.

As shown in Figure 3, Figure 4, the first step of video acquisition is exactly to the analog video signal digitlization.The digitized process of vision signal (be A/D conversion) was divided into into for two steps and finishes, and the first step is sampling, promptly continuous vision signal discretization, forms sample one by one by the time subregion.Second goes on foot then one by one, and sample is a numerical value by the amplitude size conversion, is called quantification.Digital video signal after the conversion is delivered to digital decoder and is decoded, and this decoder generally is a multi-modulation scheme.Decoded results is the YUV signal data.

As shown in Figure 3, yuv data is then cut out by the video window controller, and changes its ratio, deposits frame memory subsequently in, and approximately 74ns deposits a pixel.Video data in the frame memory has two output channels: the one tunnel is that panel monitors that the every 74ns of display monitor gets a pixel from frame memory, through digital-to-analogue conversion, becomes the rgb signal of simulation.Second output channel belongs to the further processed of service end microcomputer, and on this road, the service end microcomputer can carry out read-write operation from frame memory by the video window controller, for example, can deposit, processes, dub or the like.

As shown in Figure 3, in color space conversion, the first step A/D of video acquisition conversion is exactly a color space conversion, from the RGB color space conversion to the YUV/YIQ color space.And D/A conversion also is a color space conversion, from the YUV/YTQ color space conversion to the RGB color space.The RGB color space is modal color space, and as RGB three looks synthetic regarded arbitrary color in the RGB color space.In fact, modern color TV has adopted YUV (Phase Alternation Line system) and YIQ (TSC-system) color space.The colour signal of rgb space can be a simple matrixing to the conversion of yuv space, according to Y, and U, the value difference of V ratio, this matrixing meeting changes.Before conversion, the RGB colour signal earlier by an isolated amplifier, will be amplified the result and be divided into two-way, and one the road and original VGA signal stack, the monitoring image on the generation panel; Color space conversion is carried out on another road, so that digitized processing, promptly samples and quantizes, just analog-to-digital conversion (A/D conversion).This process is finished by special chip usually.Digital video after the A/D conversion can be compressed, and also can not compress, and is stored in the memory by the form of appointment.

As shown in Figure 3, in demonstration, the signal of display is from the VGA display card in the service end microcomputer, and when monitor video obtained on display, this signal and VGA shows signal superposeed.In order to superpose, two kinds of signals must be synchronously, and synchronous RGB and VGA signal are driven by the synchronizing signal of VGA card, alternately switch two paths of signals, realize the two paths of signals stack.

As shown in Figure 2, in video preprocessor is handled, mainly compress processing, finish digitized processing through video frequency collection card earlier, be i.e. A/D conversion.Video frequency collection card to the video signal sampling of input, adopts 4: 2: 2 forms earlier, and promptly the sample frequency of Y-signal is the twice of U, V signal.Then quantize after the sampling,, therefore produced the number of colours of 24 bit depth, i.e. 1,670 ten thousand kinds of colors generally to each 8 quantification of YUV triple channel signal.Data volume after the one two field picture digitlization is sizable, in order to dwindle the size of video file, increases memory capacity, also will handle through overcompression after the video digitizer, and then store on the hard disk.

As shown in Figure 2, the video acquisition implement device has adopted high performance video compression technology standard, rely on hardware to realize real-time coding of video and audio frequency (CIF form 25 frames) and precise synchronization fully, realized that dynamic code rate, controlled frame per second, frame pattern are selected, the dynamic image quality control, audio preview, video-losing are reported to the police, can independently be adjusted each channel parameters, stable performance and reliable.Compare with the MPEG-I product, keeping under the prerequisite of equal picture quality, can save memory space greatly, and be fit to very much the transmission of broadband networks or arrowband net.

As shown in Figure 4, drive circuit of the present utility model by model be the comparator UB2 of 74LS688, decoder UB1, model that model is 74LS138 be 74LS32's or door U6A, model be the NOR gate U7A of 74LS02, latch UB3, model that model is 74LS75 be 74LS373 latch UB4, model be 4076 16 to select a circuit U B5/UB6, model be that reverser U1A/U4A/U3A, the model of 74LS14 constituted by the 8D trigger UA1/UA2/UA3/UA4/UA5/UA6/UA7 of 74HC573.

The A0-A9 of IAS bus J4 is 10 bit address lines.7 position datawire D0-D7 link to each other with the Q output of 8D trigger UA1/UA3/UA4 respectively, and join with the D trigger end of 8D trigger UA2/UA5/UA6/UA7 and low four input 1D-4D of latch UB4.The 7 bit address line A3-A9 of IAS bus J4 link to each other with the corresponding input of comparator UB2, the input of 3 bit address line A0-A2 and decoder UB1 joins in addition, the 19th pin output of comparator UB2 and the sheet of decoder UB1 choosing input G1 end join, when A9, A8, A7, A6, A5, A4, A3=1100010, be that the address is 31 o'clock, low level of comparator UB2 the 19th pin output, under the situation that other two sheet choosing ends satisfy condition, decoder UB1 work, this moment, data were by the output line output of appointment according to different A2, A1, the input of A0 address.

Work as A2, A1, A0=000, be that the address is 310 o'clock, choose the Y0 output of decoder UB1, the signal of output is through the 6th pin of NOR gate U7A, with I/OW or the non-control end that obtains a high level input latch UB3 afterwards, make its work, between high period, the state of Q end becomes with the D state, 1D, 2D, 3D, the input of 4D is respectively from the output of latch UB4, the output vd0 of latch UB3, vd1, vd2, vd3 inserts 16 selecting sides of selecting a UB5, by to four bit address vd0, vd1, vd2, the selection of vd3 can be respectively from terminals J0, choose one tunnel output in 16 road signals of J3 input.Select for the 1st 16 a UB5 for exporting as audio frequency, the 2nd 16 is selected a UB6 is video output.

A2, A1, A0=001, be that the address is 311 o'clock, choose the Y1 output of decoder UB1, the signal of output crosses four or the 1st pin of door U7A, with I/OR or afterwards, obtains first 8D trigger of low level gating UA1, to read by the sensing data of reverser U1A and terminals J1 input, because have 24 groups of transducers, therefore need 3 8D triggers, when just the 3rd 8D trigger UA3 is corresponding to A2, A1, A0=010 on the schematic diagram; The 4th 8D trigger UA4 be corresponding to A2, A1, A0=011, respectively through or door U6A gating 8D trigger UA3 and UA4, and read by the sensing data of reverser U4A and U3A and terminals J1 input.

A2, A1, A0=100, be that the address is 314 o'clock, choose the Y4 output of decoder UB1, the signal of output is through the 9th pin of NOR gate U7A, with I/OW or non-after, obtain a high level and import the control end of the 5th 8D trigger UA5, make the data output of this 8D trigger UA5 UA1, UA2, UA3 storage.Choose the 6th, 7 8D trigger UA6, UA7 when A2, A1, A0=101 and A2, A1, A0=110 respectively, effect is the same.The data of output are used to control The Cloud Terrace, video and camera lens.

The output of 8D trigger UA2 is used to control the switch of 5 lamps and the switch of 3 video tape recorders by terminals J2.

Claims

1, the picture control device that combines with analogue technique of a kind of numeral comprises and looks phase input equipment, video frequency collection card, service end microcomputer, The Cloud Terrace, transducer, The Cloud Terrace decoding control card, it is characterized in that: also comprise drive circuit; The described phase input equipment of looking links to each other by the pci bus of video frequency collection card with the service end microcomputer, and The Cloud Terrace and transducer join by drive circuit and The Cloud Terrace decoding control card, and The Cloud Terrace decoding control card is connected with the service end microcomputer.

2, the picture control device that combines with analogue technique of numeral according to claim 1, it is characterized in that: the described phase input equipment of looking is ccd video camera or digital camera.

3, the picture control device that numeral according to claim 1 combines with analogue technique, it is characterized in that: described drive circuit is by comparator (UB2), decoder (UB1), or door (U6A) NOR gate (U7A), latch (UB3, UB4), 16 select a circuit (UB5, UB6), 8D trigger (UA1, UA2, UA3, UA4, UA5, UA6, UA7), reverser (U1A, U4A, U3A) constitute, 7 data location lines (D0-D7) of IAS bus (J4) respectively with 8D trigger (UA1, UA3, UA4) Q output links to each other, and with 8D trigger (UA2, UA5, UA6, UA7) low four inputs of D trigger end and latch (UB4) join; 7 bit address lines (A3-A9) of IAS bus (J4) link to each other with one group of input of comparator (UB2), the sheet of output that it is corresponding and decoder (UB1) selects input to join, 3 bit address lines (A0-A2) of IAS bus (J4) link to each other with the input of decoder (UB1), a road of decoder (UB1) output is connected to the control end of latch (UB3) through NOR gate (U7A), the D trigger end of four outputs in the end of latch (UB4) and latch (UB3) joins, and the output of latch (UB3) selects a circuit (UB5 through 16, UB6) with terminals (J0, J3) Nei audio frequency, video inputs is connected; Another road of decoder (UB1) output through or door (U6A) gating 8D trigger (UA1, UA3, UA4), and be connected to 24 groups of transducers by reverser (U1A, U4A, U3A) and terminals (J1); The another road of decoder (UB1) output outputs to The Cloud Terrace and looks input equipment mutually with the data of 8D trigger (UA5, UA6, UA7) with 8D trigger (UA1, UA3, UA4) storage through NOR gate (U7A); The output of 8D trigger (UA2) is connected to indicator light and video tape recorder switch by terminals (J2).