CN113419700A - Semi-screen projection system and method based on classroom teaching - Google Patents
Semi-screen projection system and method based on classroom teaching Download PDFInfo
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- 230000009471 action Effects 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 7
- 230000003993 interaction Effects 0.000 claims abstract description 6
- 230000002452 interceptive effect Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
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- 125000004122 cyclic group Chemical group 0.000 claims description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/20—Education
- G06Q50/205—Education administration or guidance
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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
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/065—Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
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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
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/067—Combinations of audio and projected visual presentation, e.g. film, slides
Abstract
The invention provides a semi-screen-projection system and a semi-screen-projection method based on classroom teaching, which comprise a classroom teaching system and a semi-screen-projection system which are interconnected through a network, wherein the classroom teaching system comprises: the system comprises a course supporting module, an online preview module, a classroom activity module and a data processing module; half screen system of throwing includes: the screen projection client management module is used for managing the client accessed to the half screen projection system; the simplified mode screen projection module is used for controlling screen projection display of digital resources of common document types; the adaptive mode screen projection module is used for balancing screen projection operation of different types of digital resources; and the screen projection data processing module is used for receiving the data of the classroom teaching system and simultaneously recording the connection state and the action data of screen projection. The invention provides a semi-screen-casting system and method based on classroom teaching, which can solve the problems that the traditional teaching classroom cannot use mobile equipment for teaching, and the resolution difference between different equipment causes inconsistent interaction.
Description
Technical Field
The invention relates to the technical field of screen projection in teaching, in particular to a semi-screen projection system and a semi-screen projection method based on classroom teaching.
Background
With the rapid development of networks, more and more users rely on mobile devices for learning and daily work. According to the survey, most teachers like to walk in class by mainly explaining courseware and assisting in class activities during teaching, so that the intimacy degree of students is increased, and the atmosphere of the class is activated. However, when the teacher leaves the platform and walks to the side of the student, the platform cannot provide service support for the teacher. The teacher will want to be able to obtain the same service as the computer through the mobile phone App, and can switch courseware on the mobile phone, order courseware, issue classroom activities, and the like.
Disclosure of Invention
In order to make up for the defects in the prior art, the invention provides a semi-screen-casting system based on classroom teaching, which aims to solve the problems that the atmosphere of a classroom is not active, the detailed process of teaching cannot be reproduced, and the resolution difference between different devices causes inconsistent interaction, so that the development of online and offline mixed classroom teaching is greatly restricted, because a traditional teaching classroom cannot use mobile devices for teaching.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a half screen-casting system based on classroom teaching comprises a classroom teaching system and a half screen-casting system which are interconnected through a network, wherein the classroom teaching system comprises:
the course support module is used for manufacturing and distributing digital resources based on the block chain;
the online preview module is used for communicating with the half-screen-projection system and displaying digital resources;
the classroom activity module is used for recording, organizing and developing classroom activities;
the data processing module is used for receiving and distributing data of each module in the classroom teaching system and sending the data to the half screen-casting system;
the half-screen projection system comprises:
the screen projection client management module is used for managing the client accessed to the semi-screen projection system and ensuring that the client continuously survives in the connected life cycle;
the simplified mode screen projection module is used for controlling screen projection display of digital resources of common document types;
the adaptive mode screen projection module is used for balancing screen projection operation of different types of digital resources;
and the screen projection data processing module is used for receiving the data of the classroom teaching system, switching to the simplified mode screen projection module or the adaptive mode screen projection module, and simultaneously recording the connection state and the action data of screen projection.
Furthermore, the screen projection module in the adaptive mode comprises a PPT screen projection module and a streaming media screen projection module, wherein the PPT screen projection module is used for screen projection control of PPT-type digital resources, and the streaming media screen projection module is used for play control of video and audio digital resources.
Further, the network may comprise the internet, a local area network, or an ad hoc network of custom protocols.
The invention also provides a semi-screen-projection method based on classroom teaching, which comprises the following steps:
s1, deploying a classroom teaching system by taking a course supporting module, a classroom activity module and an online preview module as nodes, and transmitting and exchanging data through a data processing module by each node;
s2, the half screen projection system is accessed to the classroom teaching system through a network interface;
s3, the course supporting module records the basic information and the digital resource information of the course, and sends the data to the screen projection data processing module and the online preview module through the data processing module;
s4, the screen projection data processing module verifies the data from the step S3, judges the data type and forwards the data to the simplified mode screen projection module, the adaptive mode screen projection module or the screen projection client management module, and then the screen projection client module starts to automatically search a target client and transmits the data to the target client;
s5, the online preview module receives the data from the step S3, displays the digital resources and responds to all the interactive actions;
s6, the target client receives the data in the step S4, responds according to the data type, generates screen projection interactive action data and sends the screen projection interactive action data to the half screen projection system;
s601, receiving data by a simplified mode screen projection module of a half screen projection system, carrying out normalization processing on the data of screen projection actions, and finally outputting the data to a user interface so that different client-side expression forms are consistent;
s602, the adaptive mode screen projection module receives the data, judges the type of the digital resource first, and then decides to call the PPT screen projection module or the streaming media screen projection module.
Further, in step S4, the calculation method for automatically finding the target client is as follows:
by using binary search, in an ordered data list, an intermediate number M is required, so 1 is subtracted in total, and the expression is transformed into:
F1：Fn＝F(n-1)+F(n-2)
F2：Fn＝F(n-2)+F(n-1)
wherein n is the total number, sequentially carrying out n, n/2, n/4, andkk is the number of cyclic lookups.
6. The semi-screen-projection method based on classroom teaching as claimed in claim 5, wherein in step S601, the normalization process is performed by:
assuming that S is the displacement of the user gesture on the mobile phone and T is the relative direction of the displacement, the interface layout response speed f (S, T) needs to be converted into S to adapt to the displacement change of the PCpc，SpcAnd g (f) (S)), defaulting the lower left corner of the screen of all the equipment to be initial coordinates, and obtaining a PC interface layout function hSpc,T)＝>h(g(f(S)),T)。
Setting a change curve of the gesture speed of the user and the interface layout as shown in fig. 1, wherein an X axis represents the relationship between displacement S and T, a Y axis represents the response speed of the interface layout, the value of T is 1 or-1, and the values represent downward rolling and upward rolling, so that the following functions are obtained:
assuming that the PC window width is W and the height is H, the function g is derived from the PPI calculation formula:
neglecting T to obtain
Further, in step S602, the PPT screen projection module processes that n pages of slides in the document are recorded as a set P ═ P1，p2,p3，...，pnAnd if animation interaction exists, for a document with m animations, the actions of the m animations are recorded as a set A ═ a in sequence1，a2,a3，...，amNo matter the page number or the animation is switched, the corresponding element is taken out from the set P or the set A;
in order to take reliability and response efficiency into consideration, a streaming media screen projection module triggers a balancing mechanism under the influence of network fluctuation, wherein the balancing mechanism is as follows, a loss frame rate fps and a loss difference phi between clients are defined as fps1-fps2When the loss difference is phi>At 120, the end with higher frame loss rate reduces the first resolution until no resolution can be reduced or the loss difference phi is within 120.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention solves the problems that the traditional teaching classroom can not use mobile equipment to give lessons, so that the classroom atmosphere is inactive, the detailed course of the teaching can not be reproduced, and the resolution difference between different equipment causes the mutual inconsistency, thereby greatly restricting the development of online and offline mixed classroom teaching; the novel classroom teaching is realized flexibly, the reform and development schemes of teaching materials, teachers and teaching methods are implemented, and the beneficial effect of developing teaching activities in a mobile half-screen projection mode is provided for classroom teaching.
Drawings
FIG. 1 is a graph of user gesture speed versus interface layout.
Fig. 2 is a block diagram of a semi-screen projection system based on classroom teaching according to the present invention.
Fig. 3 is a block diagram showing the construction of the classroom teaching system of the present invention.
Fig. 4 is a block diagram of a half-projection system of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Referring to fig. 2 and fig. 3, a half-screen projection system based on classroom teaching mainly includes two major parts: a half-screen projection system 10 and a classroom teaching system 20. The classroom teaching system 20 runs a teaching program and a learning program, is a basic system for supporting the half-screen-projection system 10, and is physically interconnected with the half-screen-projection system 10 through a network. Networks include, but are not limited to, forms of the internet, local area networks, ad hoc networks of custom protocols, and the like.
The classroom teaching system 20 includes a course support module 201, an online preview module 202, a classroom activity module 203, and a data processing module 204. The course support module 201 is used for making and distributing digital resources based on the blockchain, and providing content data for the semi-screen-casting system. The online preview module 202 is used for displaying the digital resources, and communicating with the half-screen-projection system to realize interaction between the user and the digital resources. The classroom activity module 203 is used for recording, organizing and developing classroom activities and providing classroom activity functional support for the half-screen projection system. The data processing module 204 is used for uniformly receiving data of the internal modules of the classroom teaching system, distributing the data to the corresponding modules, and sending the data to the important channel of the half-screen projection system.
Referring to fig. 4, the half-screen projection system 10 is composed of the following modules: a screen projection client management module 101, a simplified mode screen projection module 102, an adaptive mode screen projection module 103, and a screen projection data processing module 104.
The screen projection client management module 101 is used for managing an App client and a Web client which are accessed to the half screen projection system, and has data connection with the screen projection data processing module 104, and stores data such as connection information and state.
The reduced mode screen projection module 102 is used for controlling screen projection display of digital resources of common document types, has data connection with the screen projection data processing module 104, and can communicate data.
The adaptation mode screen projection module 103 is configured to balance screen projection operations of the digital resources according to different digital resources provided by the course support module 201. The adapting mode screen projection module 103 comprises a PPT screen projection module 1031 and a streaming media screen projection module 1032, and is in data connection with the screen projection data processing module 104, and can communicate data with each other.
The PPT screen projection module 1031 is used for PPT type digital resource screen projection control, and page turning and animation of digital resources of the Web client can be operated through the App client. The streaming media screen projection module 1032 is used for playing control of video and audio digital resources, and the pause, play, fast forward, fast backward and the like of the streaming media of the Web client can be operated through the App client.
A semi-screen projection method based on classroom teaching comprises the following steps:
and S1, deploying the classroom teaching system by taking the course support module, the classroom activity module and the online preview module as nodes, and transmitting and exchanging data through the data processing module by each node.
And S2, the half screen projection system is accessed to the classroom teaching system through a network interface.
And S3, the course supporting module records the basic information and the digital resource information of the course, and sends the data to the screen projection data processing module and the online preview module through the data processing module.
S4, the screen projection data processing module verifies the data from the step S3, judges the data type and forwards the data to the simplified mode screen projection module, the adaptive mode screen projection module or the screen projection client management module, and then the screen projection client module starts to automatically find a target client and transmits the data to the target client.
S5, the online preview module receives the data from step S3, presents the digitized resource and responds to all interactions.
And S6, the target client receives the data in the step S4, responds according to the data type, generates screen projection interactive action data and sends the screen projection interactive action data to the half screen projection system. After receiving the information connected by the client, the screen projection client management module generates a hash value for uniquely identifying the client through a hash algorithm, calculates the data to be stored by the client and dynamically maintains the client information and state. After receiving the data packet, the screen projection data processing module firstly analyzes the data, then performs signature verification on the data, encrypts the analyzed service data by adopting an RSA algorithm when calculating a signature value to obtain a signature result, and discards the data if the signature result is inconsistent.
S601, the simplified mode screen projection module of the half screen projection system receives the data, normalizes the data of the screen projection action and finally outputs the data to a user interface, so that the presentation forms of different clients are consistent.
S602, the adaptive mode screen projection module receives the data, judges the type of the digital resource first, and then decides to call the PPT screen projection module or the streaming media screen projection module.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a half screen system of throwing based on classroom teaching which characterized in that: including classroom teaching system and half screen system of throwing through network interconnection, classroom teaching system includes:
the course support module is used for manufacturing and distributing digital resources based on the block chain;
the online preview module is used for communicating with the half-screen-projection system and displaying digital resources;
the classroom activity module is used for recording, organizing and developing classroom activities;
the data processing module is used for receiving and distributing data of each module in the classroom teaching system and sending the data to the half screen-casting system;
the half-screen projection system comprises:
the screen projection client management module is used for managing the client accessed to the semi-screen projection system and ensuring that the client continuously survives in the connected life cycle;
the simplified mode screen projection module is used for controlling screen projection display of digital resources of common document types;
the adaptive mode screen projection module is used for balancing screen projection operation of different types of digital resources;
and the screen projection data processing module is used for receiving the data of the classroom teaching system, switching to the simplified mode screen projection module or the adaptive mode screen projection module, and simultaneously recording the connection state and the action data of screen projection.
2. The classroom teaching-based half-screen projection system as recited in claim 1, wherein: the adaptive mode screen projection module comprises a PPT screen projection module and a streaming media screen projection module, wherein the PPT screen projection module is used for screen projection control of PPT type digital resources, and the streaming media screen projection module is used for playing control of video and audio digital resources.
3. The classroom teaching-based half-screen projection system as recited in claim 2, wherein: the network may comprise the internet, a local area network, or an ad hoc network of custom protocols.
4. A semi-screen projection method based on classroom teaching is characterized by comprising the following steps:
s1, deploying a classroom teaching system by taking a course supporting module, a classroom activity module and an online preview module as nodes, and transmitting and exchanging data through a data processing module by each node;
s2, the half screen projection system is accessed to the classroom teaching system through a network interface;
s3, the course supporting module records the basic information and the digital resource information of the course, and sends the data to the screen projection data processing module and the online preview module through the data processing module;
s4, the screen projection data processing module verifies the data from the step S3, judges the data type and forwards the data to the simplified mode screen projection module, the adaptive mode screen projection module or the screen projection client management module, and then the screen projection client module starts to automatically search a target client and transmits the data to the target client;
s5, the online preview module receives the data from the step S3, displays the digital resources and responds to all the interactive actions;
s6, the target client receives the data in the step S4, responds according to the data type, generates screen projection interactive action data and sends the screen projection interactive action data to the half screen projection system;
s601, receiving data by a simplified mode screen projection module of a half screen projection system, carrying out normalization processing on the data of screen projection actions, and finally outputting the data to a user interface so that different client-side expression forms are consistent;
s602, the adaptive mode screen projection module receives the data, judges the type of the digital resource first, and then decides to call the PPT screen projection module or the streaming media screen projection module.
5. The semi-screen-projection method based on classroom teaching as claimed in claim 4, wherein in step S4, the calculation method for automatically finding the target client is as follows:
by using binary search, in an ordered data list, an intermediate number M is required, so 1 is subtracted in total, and the expression is transformed into:
wherein n is the total number, sequentially carrying out n, n/2, n/4, andkk is the number of cyclic lookups.
6. The semi-screen-projection method based on classroom teaching as claimed in claim 5, wherein in step S601, the normalization process is performed by:
assuming that S is the displacement of the user gesture on the mobile phone and T is the relative direction of the displacement, the interface layout response speed f (S, T) needs to be converted into S to adapt to the displacement change of the PCpc，SpcAnd g (f) (S)), defaulting the lower left corner of the screen of all the devices as a starting coordinate, and obtaining a PC interface layout function h (S)pcWhere T) > H (g (f (s)), T), where W is the PC window width and H is the height, the formula is,
7. the semi-screen-projection method for classroom teaching as claimed in claim 6, wherein the PPT screen projection module processes in step S602, and n pages of slides in the document are recorded as a set P ═ P1，p2，p3，...，pnAnd if animation interaction exists, for a document with m animations, the actions of the m animations are recorded as a set A ═ a in sequence1，a2，a3，...，amNo matter the page number or the animation is switched, the corresponding element is taken out from the set P or the set A;
the streaming media screen projection module triggers a balance mechanism under the influence of network fluctuation, wherein the balance mechanism is as follows, a loss frame rate fps and a loss difference phi between clients are defined as fps1-fps2When the loss difference phi is larger than 120, the end with larger loss frame rate reduces the first-gear definition until no definition can be reduced or the loss difference phi is within 120.
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| JP2005292438A (en) * | 2004-03-31 | 2005-10-20 | Eigyotatsu Kofun Yugenkoshi | Internet education system combined of lesson with managing operation, and practicing method therefor |
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| CN110874959A (en) * | 2018-09-03 | 2020-03-10 | 深圳市鹰硕技术有限公司 | Multi-terminal same-screen teaching system and teaching method |
| CN111738889A (en) * | 2020-08-05 | 2020-10-02 | 北京翼鸥教育科技有限公司 | OMO intelligent interactive cloud classroom system supporting multiple terminals |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005292438A (en) * | 2004-03-31 | 2005-10-20 | Eigyotatsu Kofun Yugenkoshi | Internet education system combined of lesson with managing operation, and practicing method therefor |
| CN110874959A (en) * | 2018-09-03 | 2020-03-10 | 深圳市鹰硕技术有限公司 | Multi-terminal same-screen teaching system and teaching method |
| CN109545005A (en) * | 2018-12-25 | 2019-03-29 | 广东德诚科教有限公司 | Wisdom classroom interactive system |
| CN110352451A (en) * | 2019-02-20 | 2019-10-18 | 深圳市鹰硕技术有限公司 | One kind is the same as screen teaching method, device and system, smart machine and storage medium |
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