CN106355961A - Integrated multimedia teaching system - Google Patents

Abstract

The invention provides an integrated multimedia teaching system which comprises a base, a support box, a workbench a teaching host computer, wherein a power supply device and a sound box are arranged in the support box; a mounting groove is formed at one side of the upper surface of the workbench; a groove is arranged at the bottom of the mounting groove; a foldable high-shooting instrument is arranged in the groove; a foldable connecting rod is arranged on the other side of the upper surface of the workbench; an object exhibition device is connected with the foldable connecting rod; the teaching host computer is embedded in the upper surface of the workbench; a remote teaching module is arranged on a chassis; the remote teaching module comprises a central control device and a plurality of studying devices and a data transmission module which are connected with the central control device. The multimedia teaching, video/audio playing, courseware making, recording and broadcasting and remote teaching are integrated in the multimedia teaching integrated system, the remote real guide and the network resource downloading can be realized through a remote teaching module, and the interactivity of the multimedia teaching can be enhanced by an interaction switching module.

Description

A kind of multimedia teaching integral system

Technical field

The invention belongs to Teaching Technology of Multimedia field, more particularly, to a kind of multimedia teaching integral system.

Background technology

It is a lot of that the practicality of traditional multimedia teaching system allows more schools to be benefited, and the application in imparting knowledge to students for many years has obtained Arrive everybody generally accreditation.However, traditional multimedia education system mainly by scattering device and independent control power amplifier portion Point, projection section, image pickup part grade and complete, such as video camera, sound equipment, computer etc., thus so that needed for traditional multimedia teaching Equipment is various, complex operation and manage trouble, traditional multimedia teaching system cannot be popularized well always, and one As can only be arranged at a small amount of classroom, and all classrooms can not be spread to.

Content of the invention

In order to solve above-mentioned technical problem, the present invention provides a kind of multimedia teaching integral system it is intended to solve existing Multimedia teaching integral system complex structure, multimedia teaching cannot be realized, the low problem of intelligence degree.

A kind of multimedia teaching integral system, this multimedia teaching integral system includes base, supports case, workbench With teaching main frame, it is provided with supply unit and audio amplifier in described support case, the upper surface side of described workbench offers mounting groove, The bottom of described mounting groove is additionally provided with groove, is provided with folding high photographing instrument, the upper surface of described workbench in described groove Opposite side is provided with folding connecting rod, and described folding connecting rod connects material object display device, and described teaching main frame is embedded in described workbench Upper surface, described teaching main frame include mouse, keyboard, display screen, data-interface, memorizer, photographic head, projector, recording player, Operation key panel, on and off switch and mainframe box；The bottom of described base is provided with roller, and described roller is provided with brake Bar, the bottom of described base is additionally provided with liftable support feet, and described support feet drives lifting by hydraulic jack, described Support case surface be provided with louvre, described supply unit includes power supply connecting device, electrical storage device and protective relaying device, Described power supply connecting device includes power supply input circuit and at least one the connection load that at least one connects external power source Load output circuit, described electrical storage device includes connecting the accumulator charging/discharging circuit of accumulator, and described material object display fills Put including show stand base, above described show stand base, there is bearing, described bearing has horizontal through hole and middle part There is groove, displaying arm is installed in described groove, described horizontal through hole built with connecting shaft and passes through described displaying arm, described Show inside arm equipped with expansion link, described expansion link front end side is provided with rectification knob, install below described expansion link front end There is photographic head square box, below described photographic head square box, middle part is provided with digital camera；

On described show stand base, flat front end centre position is provided with illuminating lamp, described show stand base middle circle There is at arc infrared interface, described show stand base centre position back plan is separately installed with switching switch, monitors Delivery outlet；

It is separately installed with power interface, video output, audio output port, usb interface on rear side of described show stand base, Described show stand base side has memory card socket；

Described is shown as tangible LCDs, its internal inclusion display floater, elementary layer, adhesive linkage, described Elementary layer is arranged on the outside of described display floater, and described adhesive linkage is arranged between described display floater and described elementary layer, Wherein, the first edge of the bonding plane being adhered to described display floater of described adhesive linkage and described adhesive linkage be adhered to described The second edge of the bonding plane of elementary layer is mutually displaced along bonding plane direction；

Described operation key panel includes audio amplifier playback switch, material object display switching switch, shoots switch, recorded broadcast switch Deng.

The built-in remote teaching module of described mainframe box, this remote teaching module include central control unit and with described Multiple learning devices and data transmission module that central control unit connects, this learning device includes server module and multiple Display terminal module, described display terminal module is used for downloading instructional video file from server module and cloud data module, and The plurality of display terminal connects described server module by the Internet；

Described display terminal module includes:

Public display module, shows described instructional video for playing；

Video interactive module, the video signal for typing interaction person is simultaneously shown and is exported；

Voice module, the voice signal for typing interaction person is simultaneously played out and is exported；

Word display module, for typing letter signal and shown and export；

Interactive handover module, for switching phonetic teaching and word teaching；

Described server module specifically includes: server data Transmit-Receive Unit, for receiving regarding of instructional terminal transmission Frequency evidence, and the encoded video data of composite coding unit is sent to each terminal, it is additionally operable in adaptability judging unit When result of determination is no, send resolution notice of change to corresponding terminal；Adaptability identifying unit, for judging video data Resolution whether be adapted with the video size of corresponding subwindow in described current video template；Modular unit, is used for depositing Store up and set currently used current video template；Composite coding unit, for the video channel number according to each terminal by each institute State video data copy to respectively described when subwindow corresponding with each terminal in forward sight plate, to entirely described current video template Coding video data.

Further, time delay and time preset value are carried out judgement and compare, if described prolong by described interactive handover module Time is more than the first preset value and is less than the second preset value late, then only keep phonetic teaching and word to show；If during described delay Between be more than or equal to the second time preset value, then close video interactive and phonetic teaching, and only show word displaying.

Further, described cloud data module and described central control unit comprise data during carrying out task scheduling Iterative process, in data iterative process, the probability that central controller is selected by cloud data module according to transfer formula determination, should Transfer formula is:

$p_j^i=\frac{{\[{\mathrm{\τ}}_{i,j}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i,j}\]}^{\mathrm{\β}}}{\underset{x=1}{\overset{n}{\σ}}{\[{\mathrm{\τ}}_{i,x}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i,x}\]}^{\mathrm{\β}}}$

Wherein, τ_i,jAnd η_i,jRepresent task t respectively_iDistribute to the scheduling module m of central processing unit_jWhen pheromone and Transfer expected degree, n is the number of the scheduling module of existing storage；

α is to excite coefficient, and β excites coefficient for expectation；

Described τ_i,jAnd η_i,jAll represented with the computing capability of scheduling module:

τ_i,j=η_i,j=ms_j/n；

ms_jRepresent the scheduling module m of process task i_jCalculating speed, n be constant.

Further, described data transmission module is used for receiving the video data that each video interactive end sends；Judge video Whether the resolution of data is adapted with the video size of corresponding subwindow in current video template, if it is not, to corresponding end End sends resolution notice of change, the resolution of the video data according to the change output of described resolution notice of change for this terminal； Each described video data is copied to corresponding with each terminal in current video template by video channel number according to each terminal respectively Subwindow；Coding video data to entirely described current video template, and encoded video data is sent to each institute State terminal；

Further, when described central processing unit is updated to residual risk, using equation below:

τ_ij(t+1)=(1- ρ) × τ_ij(t)+△τ_ij(t)

Wherein, τ_ij(t+1) task t when representing the t+1 time iteration_iSelect scheduling module m_jQuantity of information, 1- ρ be information residual Stay the factor, ρ span be [0,0.8), △ τ_ijT () represents task t_iSelect scheduling module m_jExecution remains in scheduling module m_j On residual risk amount.

Further, described video interactive module includes video acquisition module, intelligent video analysis module, radio-frequency module, Described video acquisition module is sent to intelligent video analysis module, intelligence for the video collecting is set up the notable model of video Data signal after processing can be sent to described radio-frequency module analysis module；Described radio-frequency module is by this data signal It is transferred to data transmission module.

Further, the video collecting is set up the notable model method of video and is included by video acquisition module: using making a reservation for Partitioning algorithm carries out over-segmentation to described video, obtains at least one region, the face of each pixel in same described region Colour is identical；

Determine color value and the barycenter in each described region；

Color value according to corresponding to regional and the barycenter of regional, set up described significance model；

Described significance model is:

Wherein, s_i1For region r_iThe significance value of middle any pixel point, w (r_j) it is region r_jIn pixel number, d_s (r_i,r_j) be used for characterizing described region r_iWith described region r_jBetween differences in spatial location metric, d_c(r_i,r_j) be used for characterizing Described region r_iWith described region r_jBetween color distortion metric, n is the region described video being carried out obtain after over-segmentation Total number, d_s(r_i,r_j) it is: d_s(r_i, r_j)=exp (- (center (r_i)-center(r_j))²/σ_s ²)；center(r_i) for institute State region r_iBarycenter, center (r_j) it is described region r_jBarycenter, when the equal normalizing of the coordinate of each pixel in described video When changing to [0,1]；

Or the color value according to each pixel, each pixel in described video is sorted out, by same color value Pixel classify as same color type；

According to the color value of each color type, set up described significance model.

Further, the method for video acquisition module collection video includes:

First, echo signal x (t) is acquired within the independent sampling period with awareness apparatus, and with a/d mode pair Signal carries out digital quantization；Then, dimensionality reduction is carried out to signal x (i) after quantifying；Finally, the signal after dimensionality reduction is reconstructed； Wherein t is sampling instant, and i is the signal sequence after quantifying.

Further, dimensionality reduction is carried out to the signal after quantifying, specifically the signal after quantifying is filtered by finite impulse response (FIR) The difference equation of ripple deviceWherein h (0) ..., h (l-1) they are filter coefficient, if The compressed sensing signals collecting framework based on filtering for the meter, the following Teoplitz calculation matrix of construction:

Then observeWherein b₁,…,b_lRegard filter coefficient as；Submatrix φ_ftSingular value be gram matrix g (φ_f, t)=φ '_ftφ_ftThe arithmetic root of eigenvalue, all spies of checking g (φ f, t) Value indicative λ i ∈ (1- δ_k,1+δ_k), i=1 ..., t, then φ_fMeet rip, and reconstructed by solving equation below optimization problem Original signal:

$\begin{array}{cc}\underset{x}{min}& \left|\right|x|{|}_{1}s.t.y={\mathrm{\φ}}_x\end{array}$

Original signal is reconstructed by linear programming method, that is, bp algorithm；

For actual compression signal, the such as collection of video signal, then change φ_fFor following form:

If signal has openness, by solving equation below optimization problem, accurately on conversion basic matrix ψ Reconstruct original signal:

$\begin{array}{cc}\underset{\mathrm{\α}}{min}& \left|\right|\mathrm{\α}|{|}_{1}s.t.y={\mathrm{\φ}}_x=\mathrm{\φ}\mathrm{\ψ}\mathrm{\α}=\mathrm{\ξ}\mathrm{\α};\end{array}$

Wherein φ is uncorrelated to ψ, and ξ is referred to as cs matrix.

Further, described radio-frequency module adopts gsm transmitter module, and described gsm transmitter module is provided with gsm terminal；Described Gsm terminal is connected with data transmission module signal；Gsm transmitter module improves the side of gsm terminal radio frequency emitting portion radiance Method includes: reads the ramp calibration curve information of gsm terminal storage, the phase place of the ramp curve test transmitting symbol according to storage is by mistake Difference is it is characterised in that when the phase error of described transmitting symbol is more than agreement defined threshold, the ramp changing described storage is bent The rising edge of line, amended ramp curve meets the time template of gsm system；

According to described amended ramp curve, the phase error of test transmitting symbol；

When the phase error launching symbol is less than or equal to agreement defined threshold, amended ramp calibration curve information is taken Ramp calibration curve information for described storage；Otherwise, after remodifying the rising edge of ramp curve or the described modification of described storage Ramp curve rising edge, until make transmitting symbol phase error be less than or equal to agreement defined threshold；

The described ramp calibration curve information that amended ramp calibration curve information is replaced described storage includes: after described modification Ramp calibration curve information replace described gsm terminal Nonvolatile memory described in storage ramp calibration curve information；

The span of described agreement defined threshold includes: 0 °～5 °；

The rising edge of the described ramp curve changing described storage includes: improves the rising edge of the ramp curve of described storage The control word of the multiple time sampling points before middle plateau, and make the control word of the plurality of time sampling point more than described Control word during plateau；

The plurality of time sampling point includes 3～5 time sampling points；

The amended control word of the plurality of time sampling point is identical；

The amended control word of the plurality of time sampling point is different；

The phase error of described test transmitting symbol adopts phase error detecting apparatus to realize.

The present invention integrates multimedia teaching, video and audio broadcasting, courseware development, recorded broadcast, remote teaching, can be by concentrating Control panel or/and the keyboard being connected with described computer assembly and mouse carry out centralized Control, permissible by remote teaching module Realize long-range true man to instruct and Internet resources download, interactive handover module enhances the interactive of multimedia teaching.

Video signal collective method of the present invention, enhances the scope to signal collection；Improve data acquisition accuracy.

The gsm transmitter module of the present invention improves gsm terminal radio frequency emitting portion radiance, so that signal is received further Strengthen it is ensured that the signal handling capacity of whole system.

Brief description

Fig. 1 is the structural representation of multimedia teaching integral system provided in an embodiment of the present invention；

Fig. 2 is the structural representation of teaching main frame provided in an embodiment of the present invention；

Fig. 3 is the structural representation of material object display device provided in an embodiment of the present invention；

Fig. 4 is the structural representation of supply unit provided in an embodiment of the present invention；

Fig. 5 is the structural representation of display floater provided in an embodiment of the present invention.

In figure: 1, base；1-1, roller；1-2, brake article；1-3, support feet；2nd, support case；2-1, supply unit；2-1- 1st, power supply connecting device；2-1-2, electrical storage device；2-1-3, protective relaying device；2-2, audio amplifier；2-3, louvre；3rd, work Platform；3-1, mounting groove；3-2, groove；3-3, high photographing instrument；3-4, folding connecting rod；4th, teaching main frame；4-1, mouse；4-2, keyboard； 4-3, display screen；4-3-1, display floater；4-3-2, elementary layer；4-3-3, adhesive linkage；4-4, data-interface；4-5, memorizer； 4-6, photographic head；4-7, projector；4-8, recording player；4-9, operation key panel；4-9-1, audio amplifier playback switch；4-9-2, reality Thing shows switching switch；4-9-3, shooting switch；4-9-4, recorded broadcast switch；4-10, on and off switch；4-11, mainframe box；5th, in kind Exhibiting device；5-1, show stand base；5-1-1, power interface；5-1-2, video output；5-1-3, audio output port；5-1- 4th, usb interface；5-1-5, memory card socket；5-2, bearing；5-3, displaying arm；5-4, connecting shaft；5-5 expansion link；5-6 photographic head Square box；5-7, digital camera；5-8, illuminating lamp；5-9, infrared interface；5-10, switching switch；5-11, supervision delivery outlet.

Specific embodiment

For content of the invention, feature and effect of the present invention can be further appreciated that, hereby enumerate following examples, and coordinate accompanying drawing Describe in detail as follows.

Refer to accompanying drawing:

The present invention provides a kind of multimedia teaching integral system, and this multimedia teaching integral system includes base 1, props up Support case 2, workbench 3 and teaching main frame 4, are provided with supply unit 2-1 and audio amplifier 2-2 in described support case 2, described workbench 3 Upper surface side offers mounting groove 3-1, and the bottom of described mounting groove 3-1 is additionally provided with groove 3-2, installs in described groove 3-2 There is folding high photographing instrument 3-3, the upper surface opposite side of described workbench 3 is provided with folding connecting rod 3-4, described folding connecting rod 3-4 Connect material object display device 5, described teaching main frame 4 is embedded in described workbench 3 upper surface, and described teaching main frame 4 includes mouse 4-1, keyboard 4-2, display screen 4-3, data-interface 4-4, memorizer 4-5, photographic head 4-6, projector 4-7, recording player 4-8, behaviour Make key panel 4-9, on and off switch 4-10 and mainframe box 4-11.

The bottom of described base 1 is provided with roller 1-1, to be moved easily.

It is provided with brake article 1-2 on described roller 1-1, braked at any time with facilitating.

The bottom of described base 1 is additionally provided with liftable support feet 1-3.

Described support feet 1-3 drives lifting by hydraulic jack.

Described support case 2 surface is provided with louvre 2-3, and described supply unit and described sound-box device are dissipated Heat.

Described supply unit 2-1 includes power supply connecting device 2-1-1, electrical storage device 2-1-2 and protective relaying device 2- 1-3.

Described power supply connecting device 2-1-1 includes the power supply input circuit and at least that at least one connects external power source The individual load output circuit connecting load.

Described electrical storage device 2-1-2 includes connecting the accumulator charging/discharging circuit of accumulator.

Described material object display device 5 includes show stand base 5-1, has bearing 5- above described show stand base 5-1 2, described bearing 5-2 has horizontal through hole and middle part has groove, is provided with displaying arm 5-3 in described groove, described Horizontal through hole built with connecting shaft 5-4 and passes through described displaying arm 5-3, equipped with expansion link 5-5, institute inside described displaying arm 5-3 State expansion link 5-5 front end side and rectification knob is installed, below described expansion link 5-5 front end, photographic head square box 5-6, institute are installed Below the photographic head square box 5-6 stating, middle part is provided with digital camera 5-7.

On described show stand base 5-1, flat front end centre position is provided with illuminating lamp 5-8, described show stand base Middle circular arc has infrared interface 5-9, described show stand base 5-1 centre position back plan is separately installed with and cuts Change switch 5-10, monitor delivery outlet 5-11.

It is separately installed with power interface 5-1-1, video output 5-1-2, audio frequency defeated on rear side of described show stand base 5-1 Outlet 5-1-3, usb interface 5-1-4, described show stand base 5-1 side has memory card socket 5-1-5.

Described display screen 4-3 is tangible LCDs, its internal inclusion display floater 4-3-1, elementary layer 4-3- 2nd, adhesive linkage 4-3-3, described elementary layer 4-3-2 are arranged on the outside of described display floater 4-3-1, and described adhesive linkage 4-3-3 sets Put between described display floater 4-3-1 and described elementary layer 4-3-2, wherein, being adhered to of described adhesive linkage 4-3-3 is described aobvious Show the first edge of the bonding plane of panel 4-3-1 and the bonding plane being adhered to described elementary layer 4-3-2 of described adhesive linkage 4-3-3 Second edge be mutually displaced along bonding plane direction.

Described operation key panel 4-9 includes audio amplifier playback switch 4-9-1, material object display switching switch 4-9-2, shooting Switch 4-9-3, recorded broadcast switch 4-9-4 etc..

The built-in remote teaching module of described mainframe box, this remote teaching module include central control unit and with described Multiple learning devices and data transmission module that central control unit connects, this learning device includes server module and multiple Display terminal module, described display terminal module is used for downloading instructional video file from server module and cloud data module, and The plurality of display terminal connects described server module by the Internet；

Described display terminal module includes:

Public display module, shows described instructional video for playing；

Video interactive module, the video signal for typing interaction person is simultaneously shown and is exported；

Voice module, the voice signal for typing interaction person is simultaneously played out and is exported；

Word display module, for typing letter signal and shown and export；

Interactive handover module, for switching phonetic teaching and word teaching；

Described server module specifically includes: server data Transmit-Receive Unit, for receiving regarding of instructional terminal transmission Frequency evidence, and the encoded video data of composite coding unit is sent to each terminal, it is additionally operable in adaptability judging unit When result of determination is no, send resolution notice of change to corresponding terminal；Adaptability identifying unit, for judging video data Resolution whether be adapted with the video size of corresponding subwindow in described current video template；Modular unit, is used for depositing Store up and set currently used current video template；Composite coding unit, for the video channel number according to each terminal by each institute State video data copy to respectively described when subwindow corresponding with each terminal in forward sight plate, to entirely described current video template Coding video data.

Further, time delay and time preset value are carried out judgement and compare, if described prolong by described interactive handover module Time is more than the first preset value and is less than the second preset value late, then only keep phonetic teaching and word to show；If during described delay Between be more than or equal to the second time preset value, then close video interactive and phonetic teaching, and only show word displaying.

Further, described cloud data module and described central control unit comprise data during carrying out task scheduling Iterative process, in data iterative process, the probability that central controller is selected by cloud data module according to transfer formula determination, should Transfer formula is:

$p_j^i=\frac{{\[{\mathrm{\τ}}_{i,j}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i,j}\]}^{\mathrm{\β}}}{\underset{x=1}{\overset{n}{\σ}}{\[{\mathrm{\τ}}_{i,x}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i,x}\]}^{\mathrm{\β}}}$

Wherein, τ_i,jAnd η_i,jRepresent task t respectively_iDistribute to the scheduling module m of central processing unit_jWhen pheromone and Transfer expected degree, n is the number of the scheduling module of existing storage；

α is to excite coefficient, and β excites coefficient for expectation；

Described τ_i,jAnd η_i,jAll represented with the computing capability of scheduling module:

τ_i,j=η_i,j=ms_j/n；

ms_jRepresent the scheduling module m of process task i_jCalculating speed, n be constant.

Further, described data transmission module is used for receiving the video data that each video interactive end sends；Judge video Whether the resolution of data is adapted with the video size of corresponding subwindow in current video template, if it is not, to corresponding end End sends resolution notice of change, the resolution of the video data according to the change output of described resolution notice of change for this terminal； Each described video data is copied to corresponding with each terminal in current video template by video channel number according to each terminal respectively Subwindow；Coding video data to entirely described current video template, and encoded video data is sent to each institute State terminal；

Further, when described central processing unit is updated to residual risk, using equation below:

τ_ij(t+1)=(1- ρ) × τ_ij(t)+△τ_ij(t)

Wherein, τ_ij(t+1) task t when representing the t+1 time iteration_iSelect scheduling module m_jQuantity of information, 1- ρ be information residual Stay the factor, ρ span be [0,0.8), △ τ_ijT () represents task t_iSelect scheduling module m_jExecution remains in scheduling module m_j On residual risk amount.

Described video interactive module includes video acquisition module, intelligent video analysis module, radio-frequency module, and described regards Frequency acquisition module is sent to intelligent video analysis module for the video collecting is set up the notable model of video, and intelligent video divides Analysis module sends the data signal after processing to described radio-frequency module；This data signal transmission is given number by described radio-frequency module According to transport module.

Further, the video collecting is set up the notable model method of video and is included by video acquisition module: using making a reservation for Partitioning algorithm carries out over-segmentation to described video, obtains at least one region, the face of each pixel in same described region Colour is identical；

Determine color value and the barycenter in each described region；

Color value according to corresponding to regional and the barycenter of regional, set up described significance model；

Described significance model is:

Wherein, s_i1For region r_iThe significance value of middle any pixel point, w (r_j) it is region r_jIn pixel number, d_s (r_i,r_j) be used for characterizing described region r_iWith described region r_jBetween differences in spatial location metric, d_c(r_i,r_j) be used for characterizing Described region r_iWith described region r_jBetween color distortion metric, n is the region described video being carried out obtain after over-segmentation Total number, d_s(r_i,r_j) it is: d_s(r_i, r_j)=exp (- (center (r_i)-center(r_j))²/σ_s ²)；center(r_i) for institute State region r_iBarycenter, center (r_j) it is described region r_jBarycenter, when the equal normalizing of the coordinate of each pixel in described video When changing to [0,1]；

Or the color value according to each pixel, each pixel in described video is sorted out, by same color value Pixel classify as same color type；

According to the color value of each color type, set up described significance model.

Further, the method for video acquisition module collection video includes:

First, echo signal x (t) is acquired within the independent sampling period with awareness apparatus, and with a/d mode pair Signal carries out digital quantization；Then, dimensionality reduction is carried out to signal x (i) after quantifying；Finally, the signal after dimensionality reduction is reconstructed； Wherein t is sampling instant, and i is the signal sequence after quantifying.

Further, dimensionality reduction is carried out to the signal after quantifying, specifically the signal after quantifying is filtered by finite impulse response (FIR) The difference equation of ripple deviceWherein h (0) ..., h (l-1) they are filter coefficient, if The compressed sensing signals collecting framework based on filtering for the meter, the following Teoplitz calculation matrix of construction:

Then observeWherein b₁,…,b_lRegard filter coefficient as；Submatrix φ_ftSingular value be gram matrix g (φ_f, t)=φ '_ftφ_ftThe arithmetic root of eigenvalue, all spies of checking g (φ f, t) Value indicative λ i ∈ (1- δ_k,1+δ_k), i=1 ..., t, then φ_fMeet rip, and reconstructed by solving equation below optimization problem Original signal:

$\begin{array}{cc}\underset{x}{min}& \left|\right|x|{|}_{1}s.t.y={\mathrm{\φ}}_x\end{array}$

Original signal is reconstructed by linear programming method, that is, bp algorithm；

For actual compression signal, the such as collection of video signal, then change φ_fFor following form:

If signal has openness, by solving equation below optimization problem, accurately on conversion basic matrix ψ Reconstruct original signal:

$\begin{array}{cc}\underset{\mathrm{\α}}{min}& \left|\right|\mathrm{\α}|{|}_{1}s.t.y={\mathrm{\φ}}_x=\mathrm{\φ}\mathrm{\ψ}\mathrm{\α}=\mathrm{\ξ}\mathrm{\α};\end{array}$

Wherein φ is uncorrelated to ψ, and ξ is referred to as cs matrix.

Further, described radio-frequency module adopts gsm transmitter module, and described gsm transmitter module is provided with gsm terminal；Described Gsm terminal is connected with data transmission module signal；Gsm transmitter module improves the side of gsm terminal radio frequency emitting portion radiance Method includes: reads the ramp calibration curve information of gsm terminal storage, the phase place of the ramp curve test transmitting symbol according to storage is by mistake Difference is it is characterised in that when the phase error of described transmitting symbol is more than agreement defined threshold, the ramp changing described storage is bent The rising edge of line, amended ramp curve meets the time template of gsm system；

According to described amended ramp curve, the phase error of test transmitting symbol；

When the phase error launching symbol is less than or equal to agreement defined threshold, amended ramp calibration curve information is taken Ramp calibration curve information for described storage；Otherwise, after remodifying the rising edge of ramp curve or the described modification of described storage Ramp curve rising edge, until make transmitting symbol phase error be less than or equal to agreement defined threshold；

The described ramp calibration curve information that amended ramp calibration curve information is replaced described storage includes: after described modification Ramp calibration curve information replace described gsm terminal Nonvolatile memory described in storage ramp calibration curve information；

The span of described agreement defined threshold includes: 0 °～5 °；

The rising edge of the described ramp curve changing described storage includes: improves the rising edge of the ramp curve of described storage The control word of the multiple time sampling points before middle plateau, and make the control word of the plurality of time sampling point more than described Control word during plateau；

The plurality of time sampling point includes 3～5 time sampling points；

The amended control word of the plurality of time sampling point is identical；

The amended control word of the plurality of time sampling point is different；

The phase error of described test transmitting symbol adopts phase error detecting apparatus to realize.

The present invention, when mobile, can rise described support feet 1-3 so that described roller 1-1 lands, in positioning, Step on brake article 1-2, described support feet 1-3 is risen and stretches downwards, and be supported beyond described roller 1-1 downwards.

The present invention, in concrete operations, turns on the power switch 4-10, connects the power supply of teaching main frame 4, and teaching main frame 4 starts Work, by operating audio amplifier playback switch 4-9-1, material object display switching switch 4-9-2, the shooting switch 4- of key panel 4-9 9-3, recorded broadcast switch 4-9-4 etc. carry out concrete teaching operation.Can be entered by folding connecting rod 3-4 when material object display device 5 does not use Row folds, to save space；When opening material object display switching switch 4-9-2, it is switched to material object display state, material object will be shown It is placed in digital camera 5-7 platform below, first the switching switch 5-10 on show stand base 5-1 is switched to broadcasting shelves, The bright 5-8 of illuminating lamp simultaneously, in the display screen 4-3 projecting to main frame 4 of imparting knowledge to students by digital camera 5-7 in kind or scialyscope 4-7 is it is possible to amplify display by kind；There is inside described material object display device 5 ccd chip, described ccd chip has The features such as image clearly, bright in luster, high definition, the photo that shoot digital camera or video camera or the storage card of video recording take Memory card socket 5-1-5 going out to be inserted in show stand bottom 5-1 seat side is play with regard to controllable, by all kinds of material object style charts, magic lantern Piece and the video capture device of transparent film demonstration, are connected to display screen 4-3 or throwing by described material object display device 5 By material object display in 4-7 in shadow machine, Digital Graphic Techniques, image stabilization, clear, beautiful can be made；By remote teaching Module can be realized long-range true man and instruct and Internet resources download, and time delay is carried out by interactive handover module with time preset value Judgement is compared, if being more than the first preset value described time delay and being less than the second preset value, only keeps phonetic teaching and word Show；If described time delay is more than or equal to the second time preset value, closes video interactive and phonetic teaching, and only show literary composition Word is shown, enhances the interactive of multimedia teaching.

Using technical solutions according to the invention, or those skilled in the art is under the inspiration of technical solution of the present invention, Design similar technical scheme, and reach above-mentioned technique effect, all fall into protection scope of the present invention.

Claims (10)

1. a kind of multimedia teaching integral system is it is characterised in that this multimedia teaching integral system includes base, support Case, workbench and teaching main frame, are provided with supply unit and audio amplifier, the upper surface side of described workbench opens up in described support case There is mounting groove, the bottom of described mounting groove is additionally provided with groove, folding high photographing instrument, described workbench are installed in described groove Upper surface opposite side be provided with folding connecting rod, described folding connecting rod connects material object display device, and described teaching main frame is embedded in institute State worktable upper surface, described teaching main frame includes mouse, keyboard, display screen, data-interface, memorizer, photographic head, projection Instrument, recording player, operation key panel, on and off switch and mainframe box；

The bottom of described base is additionally provided with liftable support feet, and described support feet drives lifting by hydraulic jack；

The built-in remote teaching module of described mainframe box, this remote teaching module include central control unit and with described central authorities Multiple learning devices and data transmission module that control device connects, this learning device includes server module and multiple display Terminal module, described display terminal module is used for downloading instructional video file from server module and cloud data module, and described Multiple display terminals connect described server module by the Internet；

Described display terminal module includes:

Public display module, shows described instructional video for playing；

Video interactive module, the video signal for typing interaction person is simultaneously shown and is exported；

Voice module, the voice signal for typing interaction person is simultaneously played out and is exported；

Word display module, for typing letter signal and shown and export；

Interactive handover module, for switching phonetic teaching and word teaching；

Described support case surface is provided with louvre；

Described supply unit includes power supply connecting device, electrical storage device and protective relaying device, described power supply connecting device bag Include that at least one connects the power supply input circuit of external power source and at least one connects the load output circuit of load, described storage Electric installation includes connecting the accumulator charging/discharging circuit of accumulator, and described material object display device includes show stand base, described Above show stand base, there is bearing, described bearing has horizontal through hole and middle part has groove, peace in described groove Equipped with showing arm, described horizontal through hole built with connecting shaft and passes through described displaying arm, equipped with expansion link inside described displaying arm, Described expansion link front end side is provided with rectification knob, is provided with photographic head square box below described expansion link front end, and described takes the photograph As below head square box, middle part is provided with digital camera；

On described show stand base, flat front end centre position is provided with illuminating lamp, circular arc in the middle of described show stand base There is infrared interface, described show stand base centre position back plan is separately installed with switching switch, monitors output Mouthful, it is separately installed with power interface, video output, audio output port, usb interface on rear side of described show stand base, described Show stand base side there is memory card socket；

Described is shown as tangible LCDs, its internal inclusion display floater, elementary layer, adhesive linkage, described unit Layer is arranged on the outside of described display floater, and described adhesive linkage is arranged between described display floater and described elementary layer, described The first edge of the bonding plane being adhered to described display floater of adhesive linkage and described adhesive linkage be adhered to described elementary layer The second edge of bonding plane is mutually displaced along bonding plane direction；

Described server module specifically includes: server data Transmit-Receive Unit, for receiving the video counts of instructional terminal transmission According to, and the encoded video data of composite coding unit is sent to each terminal, it is additionally operable to the judgement in adaptability judging unit When result is no, send resolution notice of change to corresponding terminal；Adaptability identifying unit, for judging dividing of video data Whether resolution is adapted with the video size of corresponding subwindow in described current video template；Modular unit, for storage and Set currently used current video template；Composite coding unit, described regards each for the video channel number according to each terminal Frequency according to copy to respectively described when subwindow corresponding with each terminal in forward sight plate, entirely described current video template is regarded Frequency evidence is encoded.

2. multimedia teaching integral system as claimed in claim 1 will be it is characterised in that described interactive handover module will prolong The slow time carries out judgement with time preset value and compares, if being more than the first preset value described time delay and being less than the second preset value, Phonetic teaching and word is then only kept to show；If described time delay is more than or equal to the second time preset value, close video mutual Move and phonetic teaching, and only show that word is shown.

3. multimedia teaching integral system as claimed in claim 1 it is characterised in that described cloud data module with described Central control unit comprises data iterative process, in data iterative process, central controller during carrying out task scheduling The probability being selected by cloud data module according to transfer formula determination, this transfer formula is:

$p_j^i=\frac{{\[{\mathrm{\τ}}_{i^{,}j}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i^{,}j}\]}^{\mathrm{\β}}}{\underset{x=1}{\overset{n}{\σ}}{\[{\mathrm{\τ}}_{i^{,}x}\]}^{\mathrm{\α}}{\[{\mathrm{\η}}_{i^{,}x}\]}^{\mathrm{\β}}}$

Wherein, τ_i,jAnd η_i,jRepresent task t respectively_iDistribute to the scheduling module m of central processing unit_jWhen pheromone and transfer Expected degree, n is the number of the scheduling module of existing storage；

α is to excite coefficient, and β excites coefficient for expectation；

Described τ_i,jAnd η_i,jAll represented with the computing capability of scheduling module:

τ_i,j=η_i,j=ms_j/n；

ms_jRepresent the scheduling module m of process task i_jCalculating speed, n be constant.

4. multimedia teaching integral system as claimed in claim 1 is it is characterised in that described data transmission module is used for Receive the video data that each video interactive end sends；Judge the resolution sub- window corresponding with current video template of video data Whether the video size of mouth is adapted, if it is not, sending resolution notice of change to corresponding terminal, this terminal is according to described resolution The resolution of the video data of rate notice of change change output；Each described video data is divided by the video channel number according to each terminal Do not copy to subwindow corresponding with each terminal in current video template；The video data of entirely described current video template is entered Row coding, and encoded video data is sent to each described terminal.

5. multimedia teaching integral system as claimed in claim 1 is it is characterised in that described central processing unit is to residual When information is updated, using equation below:

τ_ij(t+1)=(1- ρ) × τ_ij(t)+△τ_ij(t)

Wherein, τ_ij(t+1) task t when representing the t+1 time iteration_iSelect scheduling module m_jQuantity of information, 1- ρ for information remain because Son, ρ span be [0,0.8), △ τ_ijT () represents task t_iSelect scheduling module m_jExecution remains in scheduling module m_jOn Residual risk amount.

6. multimedia teaching integral system as claimed in claim 1 is it is characterised in that described video interactive module includes Video acquisition module, intelligent video analysis module, radio-frequency module, described video acquisition module is used for building the video collecting The notable model of vertical video is sent to intelligent video analysis module, intelligent video analysis module by the data signal after processing send to Described radio-frequency module；Described radio-frequency module is by this data signal transmission to data transmission module.

7. multimedia teaching integral system as claimed in claim 6 is it is characterised in that video acquisition module will collect Video is set up the notable model method of video and is included: carries out over-segmentation using predetermined over-segmentation algorithm to described video, obtains at least One region, in same described region, the color value of each pixel is identical；

Determine color value and the barycenter in each described region；

Color value according to corresponding to regional and the barycenter of regional, set up described significance model；

Described significance model is:

Wherein, s_i1For region r_iThe significance value of middle any pixel point, w (r_j) it is region r_jIn pixel number, d_s(r_i, r_j) be used for characterizing described region r_iWith described region r_jBetween differences in spatial location metric, d_c(r_i,r_j) be used for characterizing described Region r_iWith described region r_jBetween color distortion metric, n is the total of the region that described video carried out obtain after over-segmentation Number, d_s(r_i,r_j) it is:center(r_i) it is described area Domain r_iBarycenter, center (r_j) it is described region r_jBarycenter, when the coordinate of each pixel in described video all normalizes to When [0,1]；

Or the color value according to each pixel, each pixel in described video is sorted out, by the picture of same color value Vegetarian refreshments classifies as same color type；

According to the color value of each color type, set up described significance model.

8. multimedia teaching integral system as claimed in claim 6 is it is characterised in that video acquisition module gathers video Method includes:

First, echo signal x (t) is acquired within the independent sampling period with awareness apparatus, and with a/d mode to signal Carry out digital quantization；Then, dimensionality reduction is carried out to signal x (i) after quantifying；Finally, the signal after dimensionality reduction is reconstructed；Wherein T is sampling instant, and i is the signal sequence after quantifying.

9. multimedia teaching integral system as claimed in claim 8 is it is characterised in that drop to the signal after quantifying Dimension, the difference equation by finite impulse response filter specifically to the signal after quantifyingI= 1 ..., m, wherein h (0) ..., h (l-1) is filter coefficient, the compressed sensing signals collecting framework based on filtering for the design, construction Following Teoplitz calculation matrix:

Then observeI=1 ..., m, wherein b₁,…,b_lRegard filter coefficient as；Submatrix φ_ftStrange Different value is gram matrix g (φ_f, t)=φ '_ftφ_ftThe arithmetic root of eigenvalue, all eigenvalue λ i ∈ of checking g (φ f, t) (1-δ_k,1+δ_k), i=1 ..., t, then φ_fMeet rip, and reconstruct original signal by solving equation below optimization problem:

$\underset{x}{min}\left|\right|x|{|}_{1}s.t\·y={\mathrm{\φ}}_x$

Original signal is reconstructed by linear programming method, that is, bp algorithm；

For actual compression signal, the such as collection of video signal, then change φ_fFor following form:

${\mathrm{\φ}}_s=\left[\begin{array}{cccccccccc}{b}_1& ...& b_l& 0& ...& 0& ...& ...& ...& 0\\ 0& ...& 0& b_1& ...& b_l& 0& ...& ...& 0\\ ...& & ...& & ...& & ...& & ...& \\ 0& ...& 0& ...& 0& ...& 0& b_1& ...& b_l\end{array}\right];$

If signal has openness, by solving equation below optimization problem, Accurate Reconstruction on conversion basic matrix ψ Go out original signal:

$\underset{\mathrm{\α}}{min}\left|\right|\mathrm{\α}|{|}_{1}s.t.y={\mathrm{\φ}}_x=\mathrm{\φ}\mathrm{\ψ}\mathrm{\α}=\mathrm{\ξ}\mathrm{\α};$

Wherein φ is uncorrelated to ψ, and ξ is referred to as cs matrix.

10. multimedia teaching integral system as claimed in claim 6 is it is characterised in that described radio-frequency module is sent out using gsm Penetrate module, described gsm transmitter module is provided with gsm terminal；Described gsm terminal is connected with data transmission module signal；Gsm launches The method that module improves gsm terminal radio frequency emitting portion radiance includes: read the ramp calibration curve information of gsm terminal storage, The phase error of the ramp curve test transmitting symbol according to storage is it is characterised in that work as the phase error of described transmitting symbol During more than agreement defined threshold, change the rising edge of the ramp curve of described storage, amended ramp curve meets gsm system Time template；

According to described amended ramp curve, the phase error of test transmitting symbol；

When the phase error launching symbol is less than or equal to agreement defined threshold, amended ramp calibration curve information is replaced institute State the ramp calibration curve information of storage；Otherwise, remodify the rising edge of ramp curve of described storage or described amended The rising edge of ramp curve, until make the phase error of transmitting symbol be less than or equal to agreement defined threshold；

The described ramp calibration curve information that amended ramp calibration curve information is replaced described storage includes: will be described amended Ramp calibration curve information replaces the ramp calibration curve information of storage described in described gsm terminal Nonvolatile memory；

The span of described agreement defined threshold includes: 0 °～5 °；

The rising edge of the described ramp curve changing described storage includes: improves flat in the rising edge of ramp curve of described storage The control word of the multiple time sampling points before steady state, and make the plurality of time sampling point control word be more than described steadily Control word during state；

The plurality of time sampling point includes 3～5 time sampling points；

The amended control word of the plurality of time sampling point is identical；

The amended control word of the plurality of time sampling point is different；

The phase error of described test transmitting symbol adopts phase error detecting apparatus to realize.