WO2016138742A1 - 无线现场教学系统 - Google Patents

无线现场教学系统 Download PDF

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Publication number
WO2016138742A1
WO2016138742A1 PCT/CN2015/087005 CN2015087005W WO2016138742A1 WO 2016138742 A1 WO2016138742 A1 WO 2016138742A1 CN 2015087005 W CN2015087005 W CN 2015087005W WO 2016138742 A1 WO2016138742 A1 WO 2016138742A1
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WO
WIPO (PCT)
Prior art keywords
module
wireless
signal
display
digital signal
Prior art date
Application number
PCT/CN2015/087005
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English (en)
French (fr)
Inventor
舒华俊
Original Assignee
广州市吉星信息科技有限公司
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Application filed by 广州市吉星信息科技有限公司 filed Critical 广州市吉星信息科技有限公司
Publication of WO2016138742A1 publication Critical patent/WO2016138742A1/zh
Priority to US15/663,977 priority Critical patent/US20170330472A1/en

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Classifications

    • 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
    • G09B5/12—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations different stations being capable of presenting different information simultaneously
    • G09B5/125—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations different stations being capable of presenting different information simultaneously the stations being mobile
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/60—Editing figures and text; Combining figures or text
    • 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
    • G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
    • H04N25/75—Circuitry for providing, modifying or processing image signals from the pixel array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
    • H04N25/77—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
    • H04N25/772—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components comprising A/D, V/T, V/F, I/T or I/F converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
    • H04N25/78—Readout circuits for addressed sensors, e.g. output amplifiers or A/D converters

Definitions

  • the invention relates to the field of office teaching, in particular to a wireless field teaching system.
  • Gao Paiyi also known as a speed patrol, can perform high-speed scanning in one second with OCR Text recognition function, which can convert scanned image recognition into editable word Documentation. It can also take pictures, video, copy, network paperless fax, make e-books, trimming and other operations.
  • the Gao Paiyi is usually used as a teacher to prepare lessons, or to display the contents of the books to the computer in real time during class.
  • the present invention provides a wireless on-site teaching system, which can allow a plurality of display terminal devices to be simultaneously connected to a video capture device (wireless scanner). During the teaching display process, students can directly display their own displays. The terminal device displays the content collected by the video capture device.
  • An embodiment of the present invention provides a wireless field teaching system, including a video collection device and at least one display terminal device;
  • the video capture device includes a CMOS sensor, a signal processor, a buffer, and a wireless ap module;
  • the CMOS sensor is configured to convert the collected optical signal into a parallel video digital signal
  • the signal processor is configured to convert the parallel video digital signal into a serial video digital signal
  • the buffer is configured to buffer the serial video digital signal
  • the wireless ap module is configured to send a serial video digital signal in the buffer by wireless;
  • the display terminal device includes a wireless receiving module and a display module
  • the wireless receiving module is configured to receive a serial video digital signal sent by the wireless ap module
  • the display module is configured to display a serial video digital signal received by the wireless receiving module.
  • the CMOS comprises a pixel array scanning circuit, a signal amplifying circuit, an automatic gain control circuit and an analog to digital conversion circuit;
  • the pixel array scanning circuit is configured to scan a pixel array built in and inside the CMOS sensor to convert an optical signal into an electrical signal;
  • the signal amplifying circuit is configured to amplify an electrical signal obtained by the pixel array scanning circuit
  • the automatic gain control circuit is configured to automatically adjust a gain of the signal amplifying circuit according to a signal strength
  • the analog to digital conversion circuit is configured to convert an electrical signal output by the signal amplifying circuit into a parallel video digital signal.
  • the wireless ap module includes a signal encapsulating unit and a signal broadcasting unit;
  • the signal encapsulating unit is configured to use an SSID of the video collection device And serial video digital signals in the buffer are packaged together; the signal broadcast unit is configured to transmit the encapsulated SSID and the serial video digital signal.
  • model of the wireless ap module is RT5350.
  • the display terminal device further includes a controllable module and a storage module; the controllable module includes a screenshot unit; the screenshot unit is configured to intercept an image of any frame displayed by the display module, and pass the storage module Store it up.
  • controllable module further includes a recording unit; the recording unit is configured to acquire any continuous multi-frame image displayed by the display module, and is stored by the storage module.
  • controllable module further includes a multi-window display unit; the multi-window display unit is configured to simultaneously open a plurality of display windows; and the content of the display module is displayed in a display window opened therein.
  • controllable module further includes an editing unit; the editing unit is configured to draw or input text on any one of the display windows.
  • the beneficial effect of the wireless field teaching system provided by the embodiment of the invention is that the video collection device itself has a wireless ap
  • the module can be connected to multiple display terminal devices at the same time.
  • the position of the video capture device is not limited, and can be moved in a wide range; the display terminal device can directly display video data, and can take screenshots, videos or edit annotations according to the needs of the students. It is convenient for students to review after class and improve the learning effect; it can also increase the interactivity through multi-window contrast display. At the same time, it is also convenient for teachers to prepare lessons.
  • FIG. 1 is a schematic structural diagram of a wireless field teaching system provided by the present invention.
  • FIG. 2 is a schematic structural diagram of the video capture device 1 in FIG. 1;
  • FIG. 3 is a schematic structural view of the CMOS sensor 11 of FIG. 2;
  • FIG. 4 is a schematic structural diagram of the wireless ap module 14 in FIG. 3;
  • FIG. 5 is a schematic structural diagram of the display terminal device 2 in FIG. 1;
  • FIG. 6 is a schematic structural view of the controllable module 23 of FIG. 5.
  • FIG. 1 is a schematic structural diagram of a wireless field teaching system according to an embodiment of the present invention, which includes: a video collection device 1 And at least one display terminal device 2.
  • the first display terminal device, the second display terminal device and the third display terminal device in FIG. 1 indicate at least one display terminal device 2.
  • FIG. 2 it is a schematic structural diagram of the video capture device 1 in FIG.
  • the video capture device includes a CMOS The sensor 11, the signal processor 12, the buffer 13, and the wireless ap module 14.
  • FIG. 3 is a schematic structural diagram of the CMOS sensor 11 in FIG. 2 .
  • the CMOS sensor 11 A pixel array scanning circuit 111, a signal amplifying circuit 112, an automatic gain control circuit 113, and an analog to digital conversion circuit 114 are included.
  • the pixel array scanning circuit 111 is connected to an input terminal of the signal amplifying circuit 112. Said
  • a pixel array scanning circuit 111 for scanning the built-in and the CMOS sensor 1 The internal pixel array obtains an electrical signal of a picture.
  • the pixel array is composed of a plurality of pixel units, and the pixel unit accumulates corresponding charges according to the intensity of received light, and thus passes through the pixel array scanning circuit 111. After the periodic scan, an electrical signal of a picture can be obtained.
  • An output end of the signal amplifying circuit 112 is connected to an input end of the analog to digital conversion circuit 114, and the signal amplifying circuit 112 The output is coupled to the input of the signal amplifying circuit 112 via the automatic gain control circuit 113.
  • the signal amplifying circuit 112 is configured to scan the circuit 111 for the pixel array The obtained electrical signal is amplified.
  • the automatic gain control circuit 113 is configured to enable the signal amplifying circuit 112
  • the gain is automatically adjusted with the signal strength to ensure that the output of the signal amplifying circuit 112 does not change greatly, and the conversion accuracy of the analog-to-digital conversion circuit 114 is improved.
  • An output of the analog to digital conversion circuit 114 is coupled to the signal processor 12 via a parallel bus.
  • the analog to digital conversion circuit 114 The electrical signal for outputting the signal amplifying circuit 112 is converted into a parallel video digital signal.
  • the signal processor 12 is connected to the buffer 13.
  • the signal processor 12 is configured to convert the analog to digital conversion circuit 14
  • the output parallel video digital signal is converted to a serial video digital signal.
  • the buffer 3 is configured to buffer the serial video digital signal.
  • the buffer 13 is connected to the wireless ap module 14 via a serial bus.
  • the wireless ap module 14 is configured to process the buffer 13
  • the serial video digital signal is broadcast and used for reception by other display terminal devices 2.
  • the wireless ap module 14 includes a signal encapsulating unit 141 and a signal broadcasting unit 142. As shown in Figure 4, it is Figure 3. Schematic diagram of the wireless ap module 14 in the middle.
  • the signal encapsulating unit 141 is connected to the signal broadcasting unit 142.
  • the signal encapsulating unit 141 sets the SSID of the device And the serial video digital signals are packaged together and transmitted through the signal broadcast unit 142.
  • the model of the wireless ap module 14 is RT5350.
  • FIG. 5 is a schematic structural diagram of the display terminal device 2 in FIG. 1 .
  • the display terminal device 2 It can be a wireless terminal device such as a mobile phone, tablet or laptop.
  • the display terminal device 2 includes a wireless receiving module 21, a display module 22, a controllable module 23, and a storage module 24;
  • the wireless receiving module 21 is configured to receive a serial video digital signal sent by the wireless ap module.
  • the display module 22 is configured to display a serial video digital signal received by the wireless receiving module 21.
  • FIG. 6 is a schematic structural diagram of the controllable module 23 in FIG.
  • the controllable module 23 includes a screenshot unit 231, a recording unit 232, a multi-window display unit 233, and an editing unit 234.
  • the screenshot unit 231 is configured to intercept an image of any frame displayed by the display module 22 and pass through the storage module 24 Store it up. Through the screenshot unit 231, the student can store the image of a certain screen at any time for use in the after-school review.
  • the recording unit 232 is configured to acquire any continuous multi-frame image displayed by the display module 22, and pass the storage module 24 Store it up. Through the recording unit 232, the student can store a certain video at any time for review after class.
  • the multi-window display unit 233 is configured to simultaneously open a plurality of display windows; the display module 22 The content of the content is displayed in a display window that opens. Through the multi-window display unit 233, the student can select to display existing image files, take instant photos, and display real-time video in different windows for multi-window comparison teaching.
  • the editing unit 234 is configured to draw or input text on any one of the display windows. Convenient for students or teachers to make comments at any time.
  • the working process of the wireless field teaching system is as follows: the teacher collects video data in real time through the video capturing device 1, and passes the wireless ap. Module 14 sends out; after the student opens the display terminal device, the SSID of the video capture device 1 is searched and combined with the video capture device 1 Wireless connections. After connecting, receive real-time video data and display it. Students can take screenshots, videos, multi-window comparisons or edit annotations during the viewing process, greatly increasing interactivity and improving learning.
  • the beneficial effect of the wireless field teaching system provided by the embodiment of the invention is that the video collection device itself has a wireless ap
  • the module can be connected to multiple display terminal devices at the same time.
  • the position of the video capture device is not limited, and can be moved in a wide range; the display terminal device can directly display video data, and can take screenshots, videos or edit annotations according to the needs of the students. It is convenient for students to review after class and improve the learning effect; it can also increase the interactivity through multi-window contrast display. At the same time, it is also convenient for teachers to prepare lessons.

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  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
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Abstract

本发明公开了一种无线现场教学系统，包括视频采集设备与至少一个显示终端设备；视频采集设备包括CMOS 传感器、信号处理器、缓存器以及无线ap模块；CMOS 传感器用于将采集的光信号转换为并行视频数字信号；信号处理器用于将并行视频数字信号转换为串行视频数字信号；缓存器用于缓存串行视频数字信号；无线ap 模块用于将串行视频数字信号通过无线发送出去；显示终端设备包括无线接收模块与显示模块；无线接收模块用于接收串行视频数字信号；显示模块用于显示串行视频数字信号。在本发明公开了一种无线现场教学系统中，视频采集设备可以同时与多台显示终端设备无线连接，其不会受到限制；显示终端设备可以直接显示视频数据，提高学习效果。

Description

无线现场教学系统
技术领域
本发明涉及办公教学领域，尤其涉及一种无线现场教学系统。
背景技术
随着科技的发展，传统的教学环境及方法受到了冲击和挑战。信息技术的高速发展引起了教育的深刻变革，以往的通过投影仪将图像或视频投影到幕布上的教学环境已经落伍，教学的效果有限。
高拍仪，也称为速拍仪，能完成一秒钟高速扫描，具有OCR 文字识别功能，可以将扫描的图片识别转换成可编辑的word 文档。它还能进行拍照、录像、复印、网络无纸传真、制作电子书、裁边扶正等操作。高拍仪通常作为老师备课，或者上课时对书本上的内容实时显示到电脑上使用。
现有的高拍仪具有以下缺点：
1. 现有高拍仪，仅可以通过 USB 线连接单台笔记本电脑或台式电脑，无法连接平板电脑、智能手机或其他智能终端设备。
2. 现有有线扫描仪，由于受到连接线的束缚，无法大范围自由移动。
3. 配套软件使用方面，有如下缺点：
1、未能整合教学常用功能多窗口对比教学，缺少互动。
2、同学在观看大屏幕的实物展示或其他操作时，无法对展示内容进行拍照或录制视频。
3、教师备课时，需要利用其他工具对屏幕进行录制，没有集成屏幕录制功能，切换程序烦锁、效率较低。
4、在制作课件时，先拍下照片，再打开课件文档，再选择刚拍下的照片插入文档，操作烦锁、效率较低。
发明内容
本发明为了解决现有技术的缺陷，提出一种无线现场教学系统，可以让多种显示终端设备可同时连接视频采集设备（无线扫描仪），在教学展示过程中，学生可以直接通过自己的显示终端设备显示视频采集设备采集的内容。
本发明实施例提供一种无线现场教学系统，包括视频采集设备与至少一个显示终端设备；
所述视频采集设备包括CMOS 传感器、信号处理器、缓存器以及无线ap 模块；
所述CMOS 传感器用于将采集的光信号转换为并行视频数字信号；
所述信号处理器用于将所述并行视频数字信号转换为串行视频数字信号；
所述缓存器用于缓存所述串行视频数字信号；
所述无线ap 模块用于将所述缓存器中的串行视频数字信号通过无线发送出去；
所述显示终端设备包括无线接收模块与显示模块；
所述无线接收模块用于接收所述无线ap 模块发出的串行视频数字信号；
所述显示模块用于显示所述无线接收模块接收的串行视频数字信号。
进一步地，所述CMOS 传感器包括像素阵列扫描电路、信号放大电路、自动增益控制电路以及模数转换电路；
所述像素阵列扫描电路用于扫描内置与所述CMOS 传感器内部的像素阵列，将光信号转换为电信号；
所述信号放大电路用于对所述像素阵列扫描电路获得的电信号进行放大；
所述自动增益控制电路用于使所述信号放大电路的增益自动地随信号强度而调整；
所述模数转换电路用于将信号放大电路输出的电信号转换为并行视频数字信号。
进一步地， 所述无线ap 模块包括信号封装单元以及信号广播单元；
所述信号封装单元用于将所述视频采集设备的SSID 以及所述缓存器中的串行视频数字信号封装在一起；所述信号广播单元用于将封装在一起的SSID 以及串行视频数字信号发射出去。
进一步地， 所述无线ap 模块的型号为RT5350。
进一步地，所述显示终端设备还包括可控模块与存储模块；所述可控模块包括截图单元；所述截图单元用于截取所述显示模块显示的任意一帧图像，并通过所述存储模块存储起来。
进一步地，所述可控模块还包括录像单元；所述录像单元用于获取所述显示模块显示的任意连续的多帧图像，并通过所述存储模块存储起来。
进一步地，所述可控模块还包括多窗口显示单元；所述多窗口显示单元用于同时打开多个显示窗口；所述显示模块的内容在其中打开的一个显示窗口显示。
进一步地，所述可控模块还包括编辑单元；所述编辑单元用于在任意一个显示窗口上进行画图或输入文字。
实施本发明实施例，具有如下有益效果：
本发明实施例提供的无线现场教学系统的有益效果在于：视频采集设备本身具备无线ap 模块，可以同时与多台显示终端设备连接，视频采集设备的位置不会受到限制，可以大范围的移动；显示终端设备可以直接显示视频数据，并可以按学生需要截图、录像或者编辑批注等，方便学生课后温习，提高学习效果；还可以通过多窗口对比显示，增加互动性。同时，还方便老师备课。
附图说明
图1 是本发明提供的无线现场教学系统的结构示意图；
图2 是图1 中的视频采集设备1 的结构示意图；
图3 是图2 中的CMOS 传感器11 的结构示意图；
图4 是图3 中的无线ap 模块14 的结构示意图；
图5 是图1 中的显示终端设备2 的结构示意图；
图6 是图5 中的可控模块23 的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参见图1，是本发明实施例提供的无线现场教学系统的结构示意图，其包括：视频采集设备1 与至少一个显示终端设备2。图1 中用于第一显示终端设备、第二显示终端设备与第三显示终端设备表示有至少一个显示终端设备2。
参阅图2，其是图1 中的视频采集设备1 的结构示意图。所述视频采集设备包括CMOS 传感器11、信号处理器12、缓存器13 以及无线ap 模块14。
请参阅图3，其是图2 中的CMOS 传感器11 的结构示意图。所述CMOS 传感器11 包括像素阵列扫描电路111、信号放大电路112、自动增益控制电路113以及模数转换电路114。
所述像素阵列扫描电路111 与所述信号放大电路112 的输入端连接。所述
像素阵列扫描电路111 用于扫描内置与所述CMOS 传感器1 内部的像素阵列，获得一幅幅画面的电信号。所述像素阵列由多个像素单元组成，所述像素单元根据受光的强弱积聚相应的电荷，因而经过所述像素阵列扫描电路111 的周期性扫描后能获取一幅幅画面的电信号。
所述信号放大电路112 的输出端与所述模数转换电路114 的输入端连接，所述信号放大电路112 的输出端通过所述自动增益控制电路113 连接到所述信号放大电路112 的输入端。所述信号放大电路112 用于对所述像素阵列扫描电路111 获得的电信号进行放大。
所述自动增益控制电路113，用于使所述信号放大电路112 的增益自动地随信号强度而调整，保证所述信号放大电路112 输出变化不会很大，提高所述模数转换电路114 的转换精度。
所述模数转换电路114 的输出端通过并行总线与所述信号处理器12 连接。所述模数转换电路114 用于将信号放大电路112 输出的电信号转换为并行视频数字信号。
所述信号处理器12 与所述缓存器13 连接。所述信号处理器12 用于将所述模数转换电路14 输出的并行视频数字信号转换为串行视频数字信号。所述缓存器3 用于缓存所述串行视频数字信号。
所述缓存器13 通过串行总线与所述无线ap 模块14 连接。所述无线ap 模块14 用于处理缓存器13 中的串行视频数字信号，并广播出去，供其他显示终端设备2 接收使用。
具体地，所述无线ap 模块14 包括信号封装单元141 与信号广播单元142。如图4 所示，其是图3 中的无线ap 模块14 的结构示意图。所述信号封装单元141 与所述信号广播单元142 连接。所述信号封装单元141 将本设备SSID 以及所述串行视频数字信号封装在一起，通过所述信号广播单元142 发送出去。
在本实施例中，所述无线ap 模块14 的型号为RT5350。
请参阅图5，其是图1 中的显示终端设备2 的结构示意图。所述显示终端设备2 可以为手机、平板电脑或手提电脑等无线终端设备。
所述显示终端设备2 包括无线接收模块21、显示模块22、可控模块23 以及存储模块24；
所述无线接收模块21 用于接收所述无线ap 模块发出的串行视频数字信号。
所述显示模块22 用于显示所述无线接收模块21 接收的串行视频数字信号。
请参阅图6，其是图5 中的可控模块23 的结构示意图。
所述可控模块23 包括截图单元231、录像单元232、多窗口显示单元233以及编辑单元234。
所述截图单元231 用于截取所述显示模块22 显示的任意一帧图像，并通过所述存储模块24 存储起来。通过该截图单元231，学生可以随时将某个画面的图像存储起来，以被课后温习使用。
所述录像单元232 用于获取所述显示模块22 显示的任意连续的多帧图像，并通过所述存储模块24 存储起来。通过该录像单元232，学生可以随时将某段视频存储起来，以被课后温习使用。
所述多窗口显示单元233 用于同时打开多个显示窗口；所述显示模块22 的内容在其中打开的一个显示窗口显示。通过该多窗口显示单元233，学生可以在不同的窗口中可以选择显示已有的图片文件、即时拍摄照片、实时视频展示进行多窗口对比教学。
所述编辑单元234 用于在任意一个显示窗口上进行画图或输入文字。方便学生或老师随时做批注。
本发明实施例提供的无线现场教学系统的工作过程如下：老师通过视频采集设备1 实时采集视频数据，并通过无线ap 模块14 发送出去；学生打开显示终端设备后，搜索到视频采集设备1 的SSID 并与视频采集设备1 无线连接。连接后，接收实时视频数据并显示出来。学生可以在观看过程中截图、录像、多窗口对比显示或者编辑批注，大大地增加了互动性，全面地提高学习的效果。
本发明实施例提供的无线现场教学系统的有益效果在于：视频采集设备本身具备无线ap 模块，可以同时与多台显示终端设备连接，视频采集设备的位置不会受到限制，可以大范围的移动；显示终端设备可以直接显示视频数据，并可以按学生需要截图、录像或者编辑批注等，方便学生课后温习，提高学习效果；还可以通过多窗口对比显示，增加互动性。同时，还方便老师备课。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (8)

  1. 一种无线现场教学系统，其特征在于，包括：视频采集设备与至少一个显示终端设备；
    所述视频采集设备包括CMOS 传感器、信号处理器、缓存器以及无线ap 模块；
    所述CMOS 传感器用于将采集的光信号转换为并行视频数字信号；
    所述信号处理器用于将所述并行视频数字信号转换为串行视频数字信号；
    所述缓存器用于缓存所述串行视频数字信号；
    所述无线ap 模块用于将所述缓存器中的串行视频数字信号通过无线发送出去；
    所述显示终端设备包括无线接收模块与显示模块；
    所述无线接收模块用于接收所述无线ap 模块发出的串行视频数字信号；
    所述显示模块用于显示所述无线接收模块接收的串行视频数字信号。
  2. 如权利要求1 所述的无线现场教学系统，其特征在于，
    所述CMOS 传感器包括像素阵列扫描电路、信号放大电路、自动增益控制电路以及模数转换电路；
    所述像素阵列扫描电路用于扫描内置与所述CMOS 传感器内部的像素阵列，将光信号转换为电信号；
    所述信号放大电路用于对所述像素阵列扫描电路获得的电信号进行放大；
    所述自动增益控制电路用于使所述信号放大电路的增益自动地随信号强度而调整；
    所述模数转换电路用于将信号放大电路输出的电信号转换为并行视频数字信号。
  3. 如权利要求1 或2 所述的无线现场教学系统，其特征在于，所述无线ap 模块包括信号封装单元以及信号广播单元；
    所述信号封装单元用于将所述视频采集设备的SSID 以及所述缓存器中的串行视频数字信号封装在一起；所述信号广播单元用于将封装在一起的SSID 以及串行视频数字信号发射出去。
  4. 如权利要求3 所述的无线现场教学系统，其特征在于，
    所述无线ap 模块的型号为RT5350。
  5. 如权利要求1 所述的无线现场教学系统，其特征在于，
    所述显示终端设备还包括可控模块与存储模块；所述可控模块包括截图单元；所述截图单元用于截取所述显示模块显示的任意一帧图像，并通过所述存储模块存储起来。
  6. 如权利要求5 所述的无线现场教学系统，其特征在于，
    所述可控模块还包括录像单元；所述录像单元用于获取所述显示模块显示的任意连续的多帧图像，并通过所述存储模块存储起来。
  7. 如权利要求6 所述的无线现场教学系统，其特征在于，
    所述可控模块还包括多窗口显示单元；所述多窗口显示单元用于同时打开多个显示窗口；所述显示模块的内容在其中打开的一个显示窗口显示。
  8. 如权利要求7 所述的无线现场教学系统，其特征在于，
    所述可控模块还包括编辑单元；所述编辑单元用于在任意一个显示窗口上进行画图或输入文字。
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