CN109118854A - A kind of panorama immersion living broadcast interactive teaching system - Google Patents
A kind of panorama immersion living broadcast interactive teaching system Download PDFInfo
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- CN109118854A CN109118854A CN201710482434.3A CN201710482434A CN109118854A CN 109118854 A CN109118854 A CN 109118854A CN 201710482434 A CN201710482434 A CN 201710482434A CN 109118854 A CN109118854 A CN 109118854A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/08—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations
- G09B5/10—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations all student stations being capable of presenting the same information simultaneously
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/08—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations
- G09B5/14—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations with provision for individual teacher-student communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
Abstract
The present invention provides a kind of panorama immersion living broadcast interactive teaching system, including Master Control Room, live streaming give lessons room and classroom is listened in live streaming；The Master Control Room gives lessons room to all live streamings and all be broadcast live listens the teaching management and monitoring of classroom for realizing by Internet Server and audio video synchronization module；It is described that room of giving lessons is broadcast live, it is communicatively coupled by internet and the Master Control Room, for sending the video and/or audio given lessons by network, and listens classroom to be broadcast live with the live streaming and interact；Classroom is listened in the live streaming, is communicatively coupled by internet and the Master Control Room, for receiving the video and/or audio given lessons by network, to provide the video and/or audio of the content of courses for student, and carries out time delay optimization processing.The present invention realizes real-time communication by a variety of interactive modes between the person of giving lessons and participant；High quality, the live streaming of the audio-video of high stability of cross operator cross-terminal can be carried out over the public internet.
Description
Technical field
The present invention relates to Web education fields, more particularly, to a kind of panorama immersion living broadcast interactive teaching system.
Background technique
The existing education system in China is very huge, and outstanding educational resource is few, and considerable area is especially
The quality of education of remote districts, due to lack good teacher strength at all can not compared with the quality of education of developed regions,
Largely cause the unfairness of educational resource distribution.And with the continuous development of technology, scientific and technological application feeler and
The application of internet has gradually been dissolved into teaching field, and teleeducation system is in the ascendant.
However, in existing Web-based instruction technical application, many e-learnings be simple transformation once on
The place of class has been changed to " sound teaching " by original face-to-face teaching, but the passive of student receives the status of knowledge still
Do not changed well；Since the specific aim of online class is not strong, " too freely " and the management phase for making teaching process
To more open.
Currently, there are mainly three types of the teaching tempos of online education, first is that recorded broadcast course, second is that online one-to-one education, three
It is live course education.
The earliest form of online education is exactly recorded broadcast course, and till now from beginning, all kinds of network schools emerge one after another.Basic set pattern
It is: selects outstanding teacher, the video capture that they are attended class gets off, and is placed on and sells on the net.Not with online education industry
The drawbacks of disconnected development is perfect, recorded broadcast course is also gradually bright and clear.Maximum problem is exactly that student has no sense of participation, and teacher says always
Teacher's, student listens arbitrarily.And it is also difficult to communication after class, effect of attending class is difficult to ensure.Furthermore present many recorded broadcasts
Curriculum quality not can guarantee, and many mechanisms are only eager for instant success and quick profits, and course is caused to be manufactured in a rough and slipshod way.
The advantage of online one-to-one mode is to teach students in accordance with their aptitude, student-oriented model, and one-to-one talk is true to interact, more
It is good at the learning interest of mobilizing students.It can be improved the learning ability of student and adhere to learning rate；One-to-one specific aim nor
Chang Qiang, timely leakage detection are filled a vacancy, student there are aiming at the problem that do and improve.The disadvantage is that exist be difficult to promote on a large scale, high-quality teacher
The problems such as money is difficult to full-scope safeguards, cost of receiving an education is excessively high.
Distance education live-cast system, the advantage that can not be propagated by region using network, is received fitst water educational resource, is
Low developed area service, and the problems such as be able to solve randomness and the one-to-one high cost given lessons that recorded broadcast gives lessons.However, traditional
Live broadcast system video acquisition system, be all the prior art used, hardware device do not optimize for tutoring system,
And it is bulky, it is poorly suitable for true classroom teaching environment, study scene is single.
Summary of the invention
The present invention provides a kind of panorama immersion live streaming for overcoming the above problem or at least being partially solved the above problem
Interactive education system.
According to an aspect of the present invention, a kind of panorama immersion living broadcast interactive teaching system is provided, including Master Control Room is straight
It broadcasts and gives lessons room and classroom is listened in live streaming；
Room of giving lessons is broadcast live to all for realizing by Internet Server and audio video synchronization module in the Master Control Room
Classroom teaching management and monitoring are listened with all live streamings；
It is described that room of giving lessons is broadcast live, it is communicatively coupled by internet and the Master Control Room, for being awarded by network transmission
The video and/or audio of class, and listen classroom to be broadcast live with the live streaming and interact；
Classroom is listened in the live streaming, is communicatively coupled by internet and the Master Control Room, for being awarded by network reception
The video and/or audio of class to provide the video and/or audio of the content of courses for student, and carries out time delay optimization processing.
Further, the Master Control Room includes primary server module and audio video synchronization module；
The primary server module, for realizing the transmitting-receiving of data, transmission, storage, downloading and upload；
The audio video synchronization module is communicated to connect with the primary server module, for passing through Virtual Private Network
Classroom is listened in audio and/or transmission of video to the live streaming that will impart knowledge to students of VPN special line.
Further, it is described live streaming give lessons room and it is described live streaming listen classroom to respectively include video acquisition module, audio collection mould
Block and living broadcast interactive module；
The video acquisition module, for being broadcast live the video acquisition of interaction, video image denoising, to the view after noise reduction
Frequency image carries out coding compression and storage；
The audio collection module, for being broadcast live audio collection, noise reduction, coding compression and the transmission of interaction；
The living broadcast interactive module, for realizing the real-time ditch of video, audio and text between the person of giving lessons and participant
It is logical.
Further, it further includes video display module and time delay optimization module that classroom is listened in the live streaming；
The video display module, for being shown by the audio and/or video of the LED display progress content of courses, with
And 3-D image reconstruct；
The time delay optimization module is used to utilize the time difference between XMPP protocol optimization main broadcaster and live streaming, comprising:
By live data file fragmentation, slicing files are obtained；The slicing files are pushed into cyberchat room, the void
The user of quasi- chatroom includes all current live ends；
When there is the generation of new slicing files, the fragment number of the new slicing files is broadcasted, to current live end for described
Current live end the new slicing files are downloaded according to the fragment number.
The live streaming listens the classroom to further include, be arranged on the desktop at each seat of the instructional space audio, video and
Text interaction systems, so that each seat becomes a live streaming end.
Further, the time delay optimization module is also used to through the first optimization processing and/or the second optimization processing pair
Time difference between main broadcaster and live streaming is handled；
First optimization processing includes: the live data more sensitive for delay requirement, connects and ties up to each live streaming end
Hold a lesser buffering queue；Higher live streaming is required for Caton, it is biggish slow to each live streaming end connection maintenance one
Rush queue；
Second optimization processing includes: to carry out intelligent measurement to the network condition of all live streaming ends connection；When any straight
Broadcast end connection Network status it is good when, reduce it is described it is any live streaming end connection buffering queue；And when any live streaming end connects
When Network status is poor, increase the buffering queue of any live streaming end connection.
Further, the primary server module includes: data transmit-receive module, adaptability judging unit, modular unit, synthesis
Coding unit and cloud shared server；
The data transmit-receive module is passed for receiving video data, and by the encoded video data of composite coding unit
Each live streaming end is given, is also used to send resolution ratio to corresponding live streaming end when the judgement result of adaptability judging unit is no
Notice of change；
Whether the adaptability judging unit, the resolution ratio for judging video data are corresponding with current video template
The video size of child window is adapted, if be adapted, judging result be it is yes, if incompatible, judging result is no；
The modular unit, for storing and setting currently used current video template；
The composite coding unit, for the video channel number according to each live streaming end, by the video data point at each live streaming end
Child window corresponding with each live streaming end in the current video template is not copied to, to the video data of the current video template
It is encoded；
The cloud shared server is built in the primary server module, for being cached to live transmission signal, and
Uploaded and downloaded resources material.
Further, the video acquisition module includes that camera unit, noise reduction unit, central processor unit and storage are single
Member；
The camera unit, including 2-8 high-definition camera carry out coding compression for acquiring and generating vision signal；
The noise reduction unit, for carrying out noise reduction process to image and being connected with the camera unit；
The central processor unit is connect with the noise reduction unit, and the image after noise reduction is carried out compression and is transformed into
Encoding video pictures format；
The storage unit, for receiving the video signal image coding of central processor unit conversion.
Further, the audio collection module includes pick-up units, noise reduction filtering unit, Audio control unit, audio
Output unit；
The pick-up units are connect with the noise reduction filtering unit, and for acquiring voice data, data unprocessed form is
PCM format；
The noise reduction filtering unit is adjusted and is dropped for realizing independent left right channel gain using two-way noise filter
Rank of making an uproar is adjusted；
The Audio control unit is connect with the noise reduction filtering unit, for controlling the sound size and transmission of audio
Effect；
The audio output unit is connect with the Audio control unit, for utilizing speex encoder to audio data
After carrying out coding compression, independently exported by output interface using left and right acoustic channels.
Further, the video display module further includes visual sensor, LED light source control module, video image reading
Module, spatial information computing module and 3-D image reconstructed module.
The LED light source control module issues full color panoramic structure light for controlling LED display；
The visual sensor, for keeping the power supply of LED light source on state when the LED light source control module
When, obtain any object point in the instructional space depth and orientation angles information；When the LED light source control module makes
When the power supply of LED light source is in OFF state, the actual color information of any object point in the instructional space is obtained；
The video image read module is connect with the spatial information computing module, is passed for reading the vision
The video image of sensor and storage；
The spatial information computing module, for calculating: any object point in the instructional space to stereo-visiuon measurement
The distance and incidence angle of device central point；Any object point and the visual sensor with real focus at a distance from；It is described any
Object point is at a distance from the real focus of the LED display；Any object point is at a distance from median eye and incidence angle；
The 3-D image reconstructed module connect with the spatial information computing module and the visual sensor, is used for
Acquired panoramic picture in the visual sensor is subjected to column, operation is unfolded.
Further, the living broadcast interactive module includes host's system, background system, user side module, recognition of face mould
Block and interaction switching module；
Host's system, for user side module and background system to be communicatively coupled, by user side module
Video, audio or lteral data are sent to background system and are handled；Classroom is listened to live streaming using the face recognition module
User carries out Expression analysis；
The background system is obtained for being analyzed and determined according to the video of user side module, audio or lteral data
Interactive teaching and learning topic；
The user side module connects the live streaming end, for obtaining video, audio or the text number at the live streaming end
According to；
The interaction switching module, for by delay time compared with time preset value carries out judgement, if the delay
Time is greater than the first preset value and less than the second preset value, then phonetic teaching and text is kept to show；If the delay time is big
In being equal to the second time preset value, then video interactive and phonetic teaching are closed, carries out text displaying；If the delay time is less than
First preset value then carries out the interaction of video, audio and text；
The face recognition module, including Face datection and locating module, normalizing block, characteristic extracting module, knowledge
Other module；The positioning and detection module obtains face left upper apex and the right side by human eye coordinates for capturing human eye coordinates
The coordinate on lower vertex；The normalizing block carries out standardization processing to the facial image of acquisition, and face is aligned and corrects institute
The characteristic extracting module stated extracts operator for construction feature, extracts facial image feature vector；The identification module is based on
Sparse representation carries out plurality of human faces identification using SRC face recognition algorithms.
The present invention proposes a kind of panorama immersion living broadcast interactive teaching system, is carried out by Master Control Room to entire control system
Coordinated control restores the online direct broadcast function of true class, and real by a variety of interactive modes between the person of giving lessons and participant
Existing real-time communication；High quality, the live streaming of the audio-video of high stability of cross operator cross-terminal can be carried out over the public internet.
Detailed description of the invention
Fig. 1 is a kind of panorama immersion living broadcast interactive teaching system schematic of the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
The embodiment of the present invention passes through a kind of living broadcast interactive of panorama immersion, restores the online direct broadcast function of true class,
And real-time communication is realized by a variety of interactive modes between the person of giving lessons and participant.
The advantages of combination Traditional Classroom of the embodiment of the present invention, different geographical student real space (energy as same class
Enough accommodate the lecture theater of the unified standard mode of 30-300 people) it is inner learn, the solidarity and cooperation for being conducive to training student are smart
Mind, sense of responsibility and normal human communication, this is also that existing network classroom is lacked.It the classroom again can be as desired as straight
Classroom use of giving lessons is broadcast, a Room is dual-purpose, while reaching the network direct broadcasting teaching of huge screen holography reduction real scene, teacher
Position for video camera is no longer merely faced, can also give lessons in face of true people, can better ensure that teaching effect, teaching atmosphere
And real-time interactive effect.
As described in Figure 1, a kind of panorama immersion living broadcast interactive teaching system, including
Master Control Room, live streaming give lessons room and classroom is listened in live streaming；
Room of giving lessons is broadcast live to all for realizing by Internet Server and audio video synchronization module in the Master Control Room
The teaching management and monitoring of classroom are listened with all live streamings；
It is described that room of giving lessons is broadcast live, it is communicatively coupled by internet and the Master Control Room, for being awarded by network transmission
The video and/or audio of class, and listen classroom to be broadcast live with the live streaming and interact；
Classroom is listened in the live streaming, is communicatively coupled by internet and the Master Control Room, for being awarded by network reception
The video and/or audio of class to provide the video and/or audio of the content of courses for student, and carries out time delay optimization processing.
Live streaming described in the embodiment of the present invention listens classroom to can be set in classroom, lecture theater or audiovisual studio；It is preferred that
, the live streaming listens classroom that the lecture theater that can accommodate the unified standard mode of 30-300 people is arranged in, can be differently
Domain is replicated, and the participant of different geographical learns in real space as same class, is conducive to training student
Solidarity and cooperation spirit, sense of responsibility, acceptance and normal human communication.
The embodiment of the present invention carries out coordinated control to entire control system by Master Control Room, between the person of giving lessons and participant
Real-time communication is realized by a variety of interactive modes；High quality, the Gao Wen of cross operator cross-terminal can be carried out over the public internet
Qualitative audio-video live streaming, 360 degree of simulation true class meet classroom interactions, the learning-oriented instant social environment of raw interaction.
In one embodiment, the Master Control Room includes primary server module and audio video synchronization module；
The primary server module, for realizing the transmitting-receiving of data, transmission, storage, downloading and upload；
The audio video synchronization module is communicated to connect with the primary server module, for passing through Virtual Private Network
Classroom is listened in audio and/or transmission of video to the live streaming that will impart knowledge to students of VPN special line.
VPN, that is, Virtual Private Network described in the embodiment of the present invention (Virtual Private Network, abbreviation VPN), refers to
Be the technology that dedicated network is established in common network.Why it is known as virtual net, is primarily due to entire VPN network
There is no physical links end to end needed for traditional private network for connection between any two node, but framework is in common network
On the network platform provided by service provider, such as Internet, ATM (asynchronous transfer mode), Frame Relay (frame relay)
Logical network, user data transmits in logical links.It cover encapsulation across shared network or public network, encryption and
The extension of the dedicated network of authentication link.VPN mainly uses color tunneling technique, encryption and decryption technology, key management technology
With user and equipment identities authentication techniques.
Master Control Room described in the embodiment of the present invention realizes the live streaming by primary server module and audio video synchronization module
Give lessons room and it is described be broadcast live listen classroom the Web-based instruction management and monitoring.
In one embodiment, it is described live streaming give lessons room and it is described live streaming listen classroom to respectively include video acquisition module, sound
Frequency acquisition module and living broadcast interactive module；
The video acquisition module, for being broadcast live the video acquisition of interaction, video image denoising, to the view after noise reduction
Frequency image carries out coding compression and storage；
The audio collection module, for being broadcast live audio collection, noise reduction, coding compression and the transmission of interaction；
The living broadcast interactive module, for realizing the real-time ditch of video, audio and text between the person of giving lessons and participant
It is logical.
In the embodiment of the present invention, the live streaming room of giving lessons includes video acquisition module, audio collection module and living broadcast interactive
Module, it also includes video acquisition module, audio collection module and living broadcast interactive module that classroom is listened in the live streaming.
The live streaming room of giving lessons obtains the video given lessons and audio by video acquisition module, audio collection module and sends
Classroom is listened to the live streaming, and the teaching feedback video and audio that classroom is listened in the live streaming are received by the living broadcast interactive module
Data are broadcast live interaction.
The live streaming listens classroom to pass through video acquisition module, the video and sound of audio collection module acquisition student's teaching feedback
Frequency evidence, and be sent to the live streaming and give lessons room, it is broadcast live interaction.
In one embodiment, it further includes video display module and time delay optimization module that classroom is listened in the live streaming；
The live streaming listens the classroom to further include, be arranged on the desktop at each seat of the instructional space audio, video and
Text interaction systems, so that each seat becomes a live streaming end.
The video display module, for being shown by the audio and/or video of the LED display progress content of courses, with
And 3-D image reconstruct.
In the embodiment of the present invention, the live streaming listens classroom that sound is arranged on the desktop at each seat of the instructional space
Frequently, video and text interaction systems, so that each seat becomes a live streaming end, each live streaming end can correspond to a student；So
Communication link is carried out by video acquisition module, audio collection module, video display module and living broadcast interactive module and Master Control Room afterwards
It connects, live streaming listens classroom and live streaming to give lessons between room to carry out teaching interaction by Master Control Room.
Further, setting infrared ray face recognition device, the infrared ray face recognition in classroom classroom are listened in live streaming
Device can be set on wall or ceiling.
Further, the present invention installs VR (virtual reality) and AR (augmented reality) glasses on desk, enables and gives lessons
The impression that the participant that person is in different field has body to face the scene of giving lessons.
Further, 3D holographic projection system is arranged at dais in the present invention, and without wearing 3D glasses, participant can be seen
To three-dimensional virtual portrait.
Time delay optimization module described in the embodiment of the present invention is used for using between XMPP protocol optimization main broadcaster and live streaming
Time difference, comprising:
By live data file fragmentation, slicing files are obtained；The slicing files are pushed into cyberchat room, the void
The user of quasi- chatroom includes all current live ends；
When there is the generation of new slicing files, the fragment number of the new slicing files is broadcasted, to current live end for described
Current live end the new slicing files are downloaded according to the fragment number.
XMPP described in the embodiment of the present invention (scalable message processing Presence Protocol) is based on extensible markup language (XML)
Agreement, it be used for instant message (IM) and online in-situ measurement.It is promoting the quasi- real time operation between server.This
Agreement may finally allow Internet user on internet all other men send instant message, even if its operating system and
Browser is different.
The predecessor of XMPP described in the embodiment of the present invention is Jabber, the network instant communication that an open source form tissue generates
Agreement.XMPP completes standardization effort by IETF International Standards Organization at present.Standardized core results are divided into two parts, packet
Include the XML stream transport protocol of core and the instant messaging expanded application based on XML stream transmission.
The definition of the core XML stream transport protocol of XMPP enables XMPP more to advise at one than previous network communication protocol
On the platform of model.By means of XML be easy to parse and read characteristic, enable XMPP agreement as smart as a new pin.
The instant messaging expanded application part of XMPP is according to IETF before this to an abstract definition of instant messaging
, the instant communication protocol being used widely already with other, such as AIM, QQ etc. is functional complete, the advances such as perfect.
The Extended Protocol Jingle of XMPP makes it support voice and video.
In the embodiment of the present invention, it is contemplated that how the continuity of live broadcast teaching optimizes the time difference between main broadcaster and live streaming
Optimization, i.e., to obtain newest slicing files at the first time very crucial.One embodiment of the invention be using XMPP protocol come
Time difference optimization problem is solved, allows the new slicing files number of server push main broadcaster's Video coding to live video side.When straight
When broadcasting user starts to watch live streaming, a virtual chatroom is first added, server application is also added the cyberchat room, works as clothes
When business device has new slicing files to generate, server broadcasts the message to virtual chatroom, and notice has new slicing files to generate,
And inform newest slicing files number, the client that user is broadcast live receives slicing files number and just goes to download newest fragment text later
Part.Due to the real-time of XMPP, the client that user is broadcast live can obtain at the first time newest fragment, and request to server
Newest slicing files content, and play out, to achieve the purpose that reduce delay.
Table 1 is shown to be compared using the delay time before time delay optimization module of the embodiment of the present invention, after optimization
Before effect is broadcast live significantly better than optimization, and no matter delay in -10 seconds 7 seconds is all most from live streaming effect or in live streaming efficiency
Good reference time delay.
Table 1
In one embodiment, the time delay optimization module is also used to excellent by the first optimization processing and/or second
Change processing to handle the time difference between main broadcaster and live streaming；
First optimization processing includes: the live data more sensitive for delay requirement, connects and ties up to each live streaming end
Hold a lesser buffering queue；Higher live streaming is required for Caton, it is biggish slow to each live streaming end connection maintenance one
Rush queue；
Second optimization processing includes: to carry out intelligent measurement to the network condition of all live streaming ends connection；When any straight
Broadcast end connection Network status it is good when, reduce it is described it is any live streaming end connection buffering queue；And when any live streaming end connects
When Network status is poor, increase the buffering queue of any live streaming end connection.
In the embodiment of the present invention, server-side provides flexible configuration strategy, more sensitive for delay requirement, then is servicing
End maintains a lesser buffering queue in the case where guaranteeing key frame, to each connection；Caton is required higher straight
It broadcasts, then suitably increases the length of buffering queue, guarantee the smoothness played.Second is that server-side carries out the network condition of all connections
Intelligent measurement, when Network status is good, server-side can reduce the size of the buffering queue of the connection, reduce delay；And work as net
When network situation is poor, when especially detecting that shake is more obvious, server-side increases buffering queue length to the connection, preferential to protect
Demonstrate,prove the fluency played.
Further, by the delay of active, technical problem is prevented, prevents human accident.Filter out some reaction speeches,
The unsuitable live streaming such as porny is unfavorable for harmonious content, this delay is controlled by Master Control Room.
In one embodiment, the primary server module includes: data transmit-receive module, adaptability judging unit, template
Unit, composite coding unit and cloud shared server；
The data transmit-receive module is passed for receiving video data, and by the encoded video data of composite coding unit
Each live streaming end is given, is also used to send resolution ratio to corresponding live streaming end when the judgement result of adaptability judging unit is no
Notice of change；
Whether the adaptability judging unit, the resolution ratio for judging video data are corresponding with current video template
The video size of child window is adapted, if be adapted, judging result be it is yes, if incompatible, judging result is no；
The modular unit, for storing and setting currently used current video template；
The composite coding unit, for the video channel number according to each live streaming end, by the video data point at each live streaming end
Child window corresponding with each live streaming end in the current video template is not copied to, to the video data of the current video template
It is encoded；
The cloud shared server is built in the primary server module, for being cached to live transmission signal, and
Uploaded and downloaded resources material.
The audio video synchronization module of Master Control Room described in the embodiment of the present invention leads to the computer screen of teachers' instruction
It crosses Virtual Private Network VPN special line and is transmitted to a distant place, cooperation audio-video signal vividly reproduces classroom scene immediately.Described is virtual
Dedicated network VPN special line accesses internet by diversified forms such as optical fiber, twisted pairs, realizes the VPN networking based on IP-MAN.
The Master Control Room can control the content that screen is shown by primary server module, can show that teacher teaches
Scene can show the real-time camera lens of live streaming classroom for visit class, can also show the content of classroom interaction, it might even be possible to picture-in-picture
Form shows the video of different type, different physical regions.
In one embodiment, the video acquisition module include camera unit, noise reduction unit, central processor unit and
Storage unit；
The camera unit, including 2-20 high-definition camera carry out coding pressure for acquiring and generating vision signal
Contracting；
The noise reduction unit, for carrying out noise reduction process to image and being connected with the camera unit；
The central processor unit is connect with the noise reduction unit, and the image after noise reduction is carried out compression and is transformed into
Encoding video pictures format；
The storage unit, for receiving the video signal image coding of central processor unit conversion.
Specifically, the vision signal of acquisition is carried out coding using libx264 by the camera unit is compressed into H.264 lattice
Formula.Image after noise reduction is carried out compression and transforms into encoding video pictures bgra32 data lattice by the central processor unit
Formula.
In a preferred embodiment, 2 360 degree of computers control rotation high-definition cameras are installed, install triangular plate record additional
Camera can adjust monitoring content in control room, can be realized and push towards, zoom out, rotating, tracing and monitoring；If as live streaming
Room give lessons in use, the video camera that can increase by 2 manual controls is cooperated, comprehensive can show protagonist and broadcast the true of classroom
Situation.
In another preferred embodiment, 12 360 degree of computers control rotation high-definition cameras are installed, install triangular plate additional
Video recorder can adjust monitoring content in control room, can be realized and push towards, zoom out, rotating, tracing and monitoring；And combine 2 people
The video camera of industry control is cooperated, and the real case acted the leading role and broadcast classroom comprehensive can be showed.
Broadcast level 10bit gray proces are used inside central processor unit, are eliminated video pictures and are manually chiseled and carved trace, color
Coloured silk reduction is truer, and color transition is more gentle, and color saturation is high, realizes that real colour reproduction, photochromic gradual change improve
The display effect of video image.
In one embodiment, it further includes interaction gesture recognition system that the video acquisition module of classroom is listened in live streaming, specifically
Application principle is, using the 3D camera/video camera for being equipped with gesture tracing sensor, the picture captured from different perspectives, and weight
Palm is built out in the motion information in real world three dimensional space, identifies the tracking person of giving lessons or participant's hand motion using camera
Realtime graphic, images of gestures identified from described image after simply pre-processing by the indoor control system of master control
Hand images obtain the gesture information from the hand images.
In one embodiment, the audio collection module includes pick-up units, noise reduction filtering unit, audio frequency control list
Member, audio output unit；
The pick-up units are connect with the noise reduction filtering unit, and for acquiring voice data, data unprocessed form is
PCM format；
The noise reduction filtering unit is adjusted and is dropped for realizing independent left right channel gain using two-way noise filter
Rank of making an uproar is adjusted；
The Audio control unit is connect with the noise reduction filtering unit, for controlling the sound size and transmission of audio
Effect；
The audio output unit is connect with the Audio control unit, for utilizing speex encoder to audio data
After carrying out coding compression, independently exported by output interface using left and right acoustic channels.
Specifically, the pick-up units are acquired voice data by AudioQueue.The noise reduction filtering unit
Adjustable range to independent left right channel gain is -20dB~20dB, and the adjustable range to noise reduction rank is 0~40dB.
The embodiment of the present invention greatly optimizes answering for hardware resource and construction by noise reduction filtering, audio frequency control etc.
Miscellaneous degree reduces the maintenance cost of project's earlier stage investment and later period on the whole.
More specifically, give lessons interior in the live streaming, it can increase and wearable be to teacher, output power
The wireless microphone of 0.005-0.02W carries out adopting sound, adopt sound device it is wearable on head, it is hand-holdable, wearable on collar.
In a specific embodiment, it is described live streaming give lessons indoor increase it is wearable to it is on teacher's head, export
Power is that the wireless microphone of 0.01W carries out adopting sound.
In one embodiment, the video display module further includes visual sensor, LED light source control module, video
Image reading module, spatial information computing module and 3-D image reconstructed module.
The LED light source control module issues full color panoramic structure light for controlling LED display；
The visual sensor, for keeping the power supply of LED light source on state when the LED light source control module
When, obtain any object point in the instructional space depth and orientation angles information；When the LED light source control module makes
When the power supply of LED light source is in OFF state, the actual color information of any object point in the instructional space is obtained；
The video image read module is connect with the spatial information computing module, is passed for reading the vision
The video image of sensor and storage；
The spatial information computing module, for calculating: any object point in the instructional space to stereo-visiuon measurement
The distance and incidence angle of device central point；Any object point and the visual sensor with real focus at a distance from；It is described any
Object point is at a distance from the real focus of the LED display；Any object point is at a distance from median eye and incidence angle；
The 3-D image reconstructed module connect with the spatial information computing module and the visual sensor, is used for
Acquired panoramic picture in the visual sensor is subjected to column, operation is unfolded.
LED display described in the embodiment of the present invention can be panorama colored structures optical generator.
For the embodiment of the present invention in some special occasions, such as need the sending of panorama colored structures optical generator is infrared light
Spectrum, therefore the spectral region of LED component is selected in 700nm~2000nm.
Video display module described in the embodiment of the present invention utilizes the comprehensive live streaming lecture content of LED panorama large-size screen monitors, sufficiently benefit
The characteristic for integrating sound, photoelectricity with LED display enables participant on the spot in person, and can be realized and be given lessons always by large screen
The problem of teacher's classroom interaction, teacher feeds back according to different classrooms, adjusts lecture content and teaching form in due course
It is whole, it is truly realized the living broadcast interactive teaching of immersion.
When live streaming listens classroom that classroom is broadcast live in use, the video display module is alternatively arranged as teacher's class as giving lessons
The screen that part is shown uses.
The video display module further includes can be in the control of the switch, sound equipment for the display screen that Master Control Room is remotely controlled
System, the control of air-conditioning, electric system etc. in PLC intelligence.In addition, LED display screen body powers on mode using " substep is powered on ", both
Impact of the heavy load to power grid moment is avoided, and is effectively protected the work package of display screen body, extends the service life of screen body,
LED panorama large-size screen monitors can be automatically cut off the power if any special circumstances PLC system.
LED display described in the embodiment of the present invention be panorama large-size screen monitors display screen, control driving circuit have overvoltage protection,
The functions settings such as under-voltage protection, overcurrent protection, short-circuit protection, open circuit protection, overheating protection, unexpected power down protection.
The LED panorama large screen cabinet of the embodiment of the present invention material good using heat-radiating properties, accelerates scattering and disappearing for heat；
The LED electrical screen screen body decorative parts material good using flame retardant property；LED display sets up temperature, smog, humidity control system
System makes to shield body with overtemperature automatic alarm and automatic regulation function by heat sensor.
In order to adapt to the variability of situation, the LED panorama large-size screen monitors of the embodiment of the present invention reserve manual intervention interface, to adopt
Take emergency trouble shooting measures.For being likely to occur the part of variation, the means that daytime coloured silk emergency is adjusted lock legal picture automatically
It is fixed.
Preferably, the LED display is upright touch control electronic device.
Preferably, the LED display is the large scale display screen of 16:9 or 4:3.
Preferably, the size of the LED display is one of size of (5-10) M* (2-5) M, preferably 7M*3M
Size.
In order to realize the stereoscopic full views effect of LED large-size screen monitors, the courseware for the person of giving lessons can be cooperated to carry out automatic light adjusting, made
Obtain the teaching effect more actualization of live video.
In one embodiment, the living broadcast interactive module includes host's system, background system, user side module, people
Face identification module and interaction switching module；
Host's system, for user side module and background system to be communicatively coupled, by user side module
Video, audio or lteral data are sent to background system and are handled；Classroom is listened to live streaming using the face recognition module
User carries out Expression analysis；
The background system is obtained for being analyzed and determined according to the video of user side module, audio or lteral data
Interactive teaching and learning topic；
The user side module connects the live streaming end, for obtaining video, audio or the text number at the live streaming end
According to；
The interaction switching module, for by delay time compared with time preset value carries out judgement, if the delay
Time is greater than the first preset value and less than the second preset value, then phonetic teaching and text is kept to show；If the delay time is big
In being equal to the second time preset value, then video interactive and phonetic teaching are closed, carries out text displaying；If the delay time is less than
First preset value then carries out the interaction of video, audio and text；
The face recognition module, including Face datection and locating module, normalizing block, characteristic extracting module, knowledge
Other module；The positioning and detection module obtains face left upper apex and the right side by human eye coordinates for capturing human eye coordinates
The coordinate on lower vertex；The normalizing block carries out standardization processing to the facial image of acquisition, and face is aligned and corrects institute
The characteristic extracting module stated extracts operator for construction feature, extracts facial image feature vector；The identification module is based on
Sparse representation carries out plurality of human faces identification using SRC face recognition algorithms.
In the embodiment of the present invention, in interaction link student's service includes that (INTRODUCTION OF THE COURSE STRUCTURE, lecturer are introduced, are pre- for course advance notice
Habit data), study participates in (register, put question to, discussing etc. interaction link), takes an examination that (classroom test, is examined homework after class for operation
Examination), data download (learning before class data, after class lecturer's handout), feedback suggest that (course and lecturer evaluation), individual center (are looked into
Read situation of attending class, usually integral and exam score).
In conclusion a kind of panorama immersion living broadcast interactive teaching system of the present invention, structure includes that live streaming is listened to the teacher
Room and Master Control Room.Wherein, live streaming is listened in classroom can not only be used for giving lessons, and also be can be used as and is listened classroom, by Master Control Room to entire control
System carries out coordinated control.Any one listens classroom all and can be used as the room of giving lessons use, reduces in addition setting and gives lessons classroom is broadcast live
Cost, teacher, which can according to need, selects the live streaming of oneself most convenient that classroom is listened to give lessons, and has in classroom of giving lessons and listens
The practical admission of class person further promotes the effect of teachers convenient for adjusting classroom atmosphere.The participant of different geographical is same
The live streaming nearest from oneself, which can be chosen, listens classroom to give education training.The invention has the following beneficial effects:
1, camera arrangements are combined by the computer control of multimachine position and manual control and realizes the person of giving lessons scene elegance most
Optimization shows.
2, realize that participant is on the spot in person by the lecture theater that the LED panorama large-size screen monitors combined standard of light, color gradual change is equipped with
Feeling.
3, it is arranged by 3-D audio, realizes audio experience sense on the spot in person.
4, by face identification system, more rock noise video text interactions is controlled, guarantee the optimization of interaction effect with algorithm.
5, using advanced VPN circulation way, the lossless propagation of audio, video data is realized.
6, live streaming is listened to the teacher indoor in conjunction with 3D holography projection, VR (virtual reality) technology, realizes that international master breaks region circle
Limit the planning of entering classrooms.
Finally, method of the invention is only preferable embodiment, it is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of panorama immersion living broadcast interactive teaching system, which is characterized in that give lessons room including Master Control Room, live streaming and live streaming is listened
Classroom；
Give lessons room and institute is broadcast live to all for realizing by Internet Server and audio video synchronization module in the Master Control Room
There is live streaming to listen the teaching management and monitoring of classroom；
It is described that room of giving lessons is broadcast live, it is communicatively coupled by internet and the Master Control Room, for what is given lessons by network transmission
Video and/or audio, and listen classroom to be broadcast live with the live streaming and interact；
Classroom is listened in the live streaming, is communicatively coupled by internet and the Master Control Room, for what is given lessons by network reception
Video and/or audio to provide the video and/or audio of the content of courses for student, and carries out time delay optimization processing.
2. the system as claimed in claim 1, which is characterized in that the Master Control Room includes that primary server module and audio frequency and video are same
Walk module；
The primary server module, for realizing the transmitting-receiving of data, transmission, storage, downloading and upload；
The audio video synchronization module is communicated to connect with the primary server module, for special by Virtual Private Network VPN
Classroom is listened in line audio and/or transmission of video to the live streaming that will impart knowledge to students.
3. the system as claimed in claim 1, which is characterized in that it is described live streaming give lessons room and it is described live streaming listen classroom to respectively include
Video acquisition module, audio collection module and living broadcast interactive module；
The video acquisition module, for being broadcast live the video acquisition of interaction, video image denoising, to the video figure after noise reduction
As carrying out coding compression and storage；
The audio collection module, for being broadcast live audio collection, noise reduction, coding compression and the transmission of interaction；
The living broadcast interactive module, for realizing the real-time communication of video, audio and text between the person of giving lessons and participant.
4. system as claimed in claim 3, which is characterized in that it further includes video display module and time that classroom is listened in the live streaming
Postpone optimization module；
The video display module, for being shown by the audio and/or video of the LED display progress content of courses, Yi Jisan
Tie up image reconstruction；
The time delay optimization module is used to utilize the time difference between XMPP protocol optimization main broadcaster and live streaming, comprising:
By live data file fragmentation, slicing files are obtained；The slicing files are pushed into cyberchat room, it is described virtually to chat
The user of its room includes all current live ends；
When there is the generation of new slicing files, the fragment number of the new slicing files is broadcasted to current live end, for described current
End is broadcast live, the new slicing files are downloaded according to the fragment number；
It further includes that audio, video and text are arranged on the desktop at each seat of the instructional space that classroom is listened in the live streaming
Interaction systems, so that each seat becomes a live streaming end.
5. system as claimed in claim 4, which is characterized in that the time delay optimization module is also used to through the first optimization
Processing and/or the second optimization processing handle the time difference between main broadcaster and live streaming；
First optimization processing includes: the live data more sensitive for delay requirement, maintains one to the connection of each live streaming end
A lesser buffering queue；Higher live streaming is required for Caton, each live streaming end is connected and maintains a biggish buffering team
Column；
Second optimization processing includes: to carry out intelligent measurement to the network condition of all live streaming ends connection；When any live streaming end
When the Network status of connection is good, the buffering queue of any live streaming end connection is reduced；And net is worked as in connection when any live streaming end
When network situation is poor, increase the buffering queue of any live streaming end connection.
6. system as claimed in claim 2, which is characterized in that the primary server module includes: data transmit-receive module, adapts to
Sex determination unit, modular unit, composite coding unit and cloud shared server；
The data transmit-receive module is sent to for receiving video data, and by the encoded video data of composite coding unit
Each live streaming end, is also used to when the judgement result of adaptability judging unit is no, sends resolution ratio change to corresponding live streaming end
Notice；
The adaptability judging unit, for judge video data resolution ratio whether with sub- window corresponding in current video template
Mouthful video size be adapted, if be adapted, judging result be it is yes, if incompatible, judging result is no；
The modular unit, for storing and setting currently used current video template；
The composite coding unit, it is for the video channel number according to each live streaming end, the video data at each live streaming end is multiple respectively
Child window corresponding with each live streaming end in the current video template is made, the video data of the current video template is carried out
Coding；
The cloud shared server is built in the primary server module, for caching to live transmission signal, and carries out
Upload and download resources material.
7. system as claimed in claim 3, which is characterized in that the video acquisition module include camera unit, noise reduction unit,
Central processor unit and storage unit；
The camera unit, including 2-8 high-definition camera carry out coding compression for acquiring and generating vision signal；
The noise reduction unit, for carrying out noise reduction process to image and being connected with the camera unit；
The central processor unit is connect with the noise reduction unit, and the image after noise reduction is carried out compression and transforms into video
Coding format；
The storage unit, for receiving the video signal image coding of central processor unit conversion.
8. system as claimed in claim 3, which is characterized in that the audio collection module includes pick-up units, noise reduction filter
Wave unit, Audio control unit, audio output unit；
The pick-up units are connect with the noise reduction filtering unit, and for acquiring voice data, data unprocessed form is PCM
Format；
The noise reduction filtering unit is adjusted and noise reduction grade using two-way noise filter for realizing independent left right channel gain
It does not adjust；
The Audio control unit is connect with the noise reduction filtering unit, for controlling the sound size and laser propagation effect of audio；
The audio output unit is connect with the Audio control unit, for being carried out using speex encoder to audio data
After coding compression, independently exported by output interface using left and right acoustic channels.
9. system as claimed in claim 3, which is characterized in that the video display module further includes visual sensor, LED light
Source control module, video image read module, spatial information computing module and 3-D image reconstructed module.
The LED light source control module issues full color panoramic structure light for controlling LED display；
The visual sensor, when for making the power supply of LED light source on state when the LED light source control module,
Obtain any object point in the instructional space depth and orientation angles information；When the LED light source control module makes LED
When the power supply of light source is in OFF state, the actual color information of any object point in the instructional space is obtained；
The video image read module is connect, for reading the visual sensor with the spatial information computing module
Video image and storage；
The spatial information computing module, for calculating: any object point in the instructional space to stereo vision measuring apparatus
The distance and incidence angle of central point；Any object point and the visual sensor with real focus at a distance from；Any object point
At a distance from the real focus of the LED display；Any object point is at a distance from median eye and incidence angle；
The 3-D image reconstructed module is connect with the spatial information computing module and the visual sensor, for will be
Acquired panoramic picture carries out column expansion operation in the visual sensor.
10. system as claimed in claim 3, which is characterized in that the living broadcast interactive module includes host's system, backstage system
System, user side module, face recognition module and interaction switching module；
Host's system, for user side module and background system to be communicatively coupled, by the video of user side module,
Audio or lteral data are sent to background system and are handled；Using the face recognition module to live streaming listen the user of classroom into
Row Expression analysis；
The background system obtains teaching for being analyzed and determined according to the video of user side module, audio or lteral data
Interact topic；
The user side module connects the live streaming end, for obtaining video, audio or the lteral data at the live streaming end；
The interaction switching module, for by delay time compared with time preset value carries out judgement, if the delay time
Greater than the first preset value and less than the second preset value, then phonetic teaching and text is kept to show；If the delay time be greater than etc.
In the second time preset value, then video interactive and phonetic teaching are closed, carries out text displaying；If the delay time is less than first
Preset value then carries out the interaction of video, audio and text；
The face recognition module, including Face datection and locating module, normalizing block, characteristic extracting module, identification mould
Block；The positioning and detection module obtains face left upper apex and bottom right top for capturing human eye coordinates, and by human eye coordinates
The coordinate of point；The normalizing block carries out standardization processing to the facial image of acquisition, face alignment correction is described
Characteristic extracting module extracts operator for construction feature, extracts facial image feature vector；The identification module is based on sparse
Characterization carries out plurality of human faces identification using SRC face recognition algorithms.
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| CN114120729B (en) * | 2021-11-29 | 2023-09-12 | Oook(北京)教育科技有限责任公司 | Live teaching system and method |
| CN117560538A (en) * | 2024-01-12 | 2024-02-13 | 江西微博科技有限公司 | Service method and device of interactive voice video based on cloud platform |
| CN117560538B (en) * | 2024-01-12 | 2024-03-22 | 江西微博科技有限公司 | Service method of interactive voice video based on cloud platform |
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