WO2017166879A1 - Channel-locking method and device for use during recording and broadcasting of teaching process - Google Patents
Channel-locking method and device for use during recording and broadcasting of teaching process Download PDFInfo
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- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
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- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
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- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44231—Monitoring of peripheral device or external card, e.g. to detect processing problems in a handheld device or the failure of an external recording device
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- the first control signal is sent to the teaching and recording system; and the recording and recording system switches the recording channel to the user computer channel according to the first control signal.
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Abstract
The invention relates to a channel-locking method and device for use during recording and broadcasting of a teaching process. The channel-locking method for use during recording and broadcasting of a teaching process comprises the following steps: comparing an image of a current frame of a video signal with an image of a frame preceding the current frame and detecting if there is a change in the images, the video signal being a video signal inputted to a computer of a user using a teaching process recording and broadcasting system; feeding back a comparison and detection result to the teaching process recording and broadcasting system; and switching, by the teaching process recording and broadcasting system, and according to the comparison and detection result, a recording and broadcasting channel to a channel of the computer of the user, or maintaining a current signal channel. The invention uses a signal detection process. When a change is detected in an inputted video signal, a corresponding comparison and detection result is transmitted to a recording and broadcasting system, and the recording and broadcasting system switches a recording and broadcasting channel to a corresponding channel, thereby effectively preventing a problem in which a conventional recording and broadcasting system is unable to record and broadcast a complete teaching process due to a lack of a channel-locking operation, and realizing an automatic recording and broadcasting process for a teaching process.
Description
本发明涉及计算机视觉教学以及智能交互平板设备领域，特别是涉及一种教学录播用锁定画面的方法及装置。The invention relates to the field of computer vision teaching and intelligent interactive tablet device, in particular to a method and device for locking a picture for teaching recording and broadcasting.
传统的录播系统在控制面板处会有一个“锁定”的按键，具体可如图1所示。其中，锁定按键的使用场景一般为：常规录播系统中，如果用户的电脑输入画面PPT翻页时，录播通道就会切换到外置电脑通道，一定的延迟(系统可以设置，比如3秒、5秒等)后，录播的通道就会切换回外围设备(摄像头画面)。但是如果外置电脑输入的是一段视频(时间比PPT翻页长，比如视频的时长可能为十几分钟、一个小时等等)，录播的通道就不能在系统设置的延迟时间后切换回外围设备了，否则外置电脑的视频信号无法完整地录制下来，此时就需要用户按下“锁定”按键，将录播通道锁定在外置电脑通道，用户确定无需再锁定录制外置电脑通道时，再按下“锁定”按键解锁，此时录播的通道控制权交还给录播系统控制。The traditional recording system will have a "lock" button at the control panel, as shown in Figure 1. Among them, the use scene of the lock button is generally: in the conventional recording and broadcasting system, if the user's computer input screen PPT pages, the recording channel will switch to the external computer channel, a certain delay (the system can be set, for example, 3 seconds) After 5 seconds, the recorded channel will switch back to the peripheral device (camera screen). However, if the external computer inputs a video (the time is longer than the PPT page, for example, the duration of the video may be ten minutes, one hour, etc.), the recorded channel cannot be switched back to the periphery after the delay time set by the system. The device is out, otherwise the video signal of the external computer cannot be completely recorded. In this case, the user needs to press the “lock” button to lock the recording channel to the external computer channel, and the user determines that there is no need to lock the recording of the external computer channel. Press the “Lock” button again to unlock, and the channel control right of the recording and recording is returned to the recording system control.
在实现过程中，发明人发现传统技术中至少存在如下问题：在使用过程中，若用户没有按下“锁定”键，就可能会导致没有完整的录制外置电脑的视频画面的问题；其次，在“锁定”状态下，若用户没有按下“锁定”键解锁，会导致录播通道一直为外置电脑通道，没有起到整体录播的效果。In the implementation process, the inventor found that at least the following problems exist in the conventional technology: in the process of using, if the user does not press the "lock" button, it may cause a problem of not completely recording the video picture of the external computer; secondly, In the "locked" state, if the user does not press the "lock" button to unlock, the recording channel will always be an external computer channel, and the overall recording effect is not achieved.
发明内容Summary of the invention
基于此，有必要针对传统录播系统由于没有锁定画面导致无法完整录播的问题，提供一种教学录播用锁定画面的方法及装置。Based on this, it is necessary to provide a method and device for locking the screen for teaching recording and recording, because the conventional recording and broadcasting system cannot complete the recording due to the lack of locking the screen.
为了实现上述目的，本发明技术方案的实施例为：In order to achieve the above object, an embodiment of the technical solution of the present invention is:
一方面，提供了一种教学录播用锁定画面的方法，包括以下步骤：In one aspect, a method for teaching a lock screen for recording and recording is provided, including the following steps:
对视频信号的当前帧的图像与当前帧的上一帧的图像进行图像是否发生变
化的比较检测，视频信号为教学录播系统的用户电脑输入的视频信号；Whether the image changes to the image of the current frame of the video signal and the image of the previous frame of the current frame
Comparative detection, the video signal is the video signal input by the user computer of the teaching recording and broadcasting system;
向教学录播系统反馈比较检测结果；由教学录播系统根据比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。The comparison test result is fed back to the teaching recording and broadcasting system; the teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
另一方面，提供了一种教学录播用锁定画面的装置，包括：In another aspect, an apparatus for teaching a lock screen for recording and recording is provided, including:
信号检测模块，用于对视频信号的当前帧的图像与当前帧的上一帧的图像进行图像是否发生变化的比较检测，视频信号为教学录播系统的用户电脑输入的视频信号；向教学录播系统反馈比较检测结果；由教学录播系统根据比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。The signal detecting module is configured to compare and detect the image of the current frame of the video signal and the image of the previous frame of the current frame, and the video signal is a video signal input by a user computer of the teaching recording and broadcasting system; The broadcast system feedbacks the comparison test result; the teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
上述技术方案具有如下有益效果：The above technical solution has the following beneficial effects:
本发明教学录播用锁定画面的方法及装置，通过信号检测流程，当检测到输入的视频信号有变化时，则发送相应的比较检测结果给录播系统，由录播系统将录播通道切换到相应的通道，可以有效的防止传统录播系统由于没有锁定画面导致无法完整录播的问题出现，无须用户通过手动的“锁定”来切换录播通道，实现教学录播过程的自动化处理。The method and device for locking a picture for teaching and recording according to the present invention, through the signal detection process, when detecting that the input video signal changes, transmitting a corresponding comparison detection result to the recording and broadcasting system, and switching the recording channel by the recording and broadcasting system By the corresponding channel, the problem that the traditional recording and recording system cannot be completely recorded due to the lack of the locked screen can be effectively prevented, and the user does not need to manually switch the recording channel by manual "locking" to realize the automatic processing of the teaching recording and broadcasting process.
图1为传统教学录播系统结构示意图；1 is a schematic structural diagram of a conventional teaching recording and broadcasting system;
图2为本发明教学录播用锁定画面的方法实施例1的流程示意图；2 is a schematic flow chart of Embodiment 1 of a method for locking a screen for teaching recording and recording according to the present invention;
图3为本发明教学录播用锁定画面的方法实施例1中检测视频信号的流程示意图；3 is a schematic flowchart of detecting a video signal in Embodiment 1 of a method for locking a screen for teaching recording and playing;
图4为本发明教学录播用锁定画面的装置实施例1的结构示意图；4 is a schematic structural diagram of Embodiment 1 of an apparatus for locking a screen for teaching recording and playing according to the present invention;
图5为本发明教学录播用锁定画面的装置一具体实施例的结构示意图。FIG. 5 is a schematic structural diagram of a specific embodiment of a device for locking a screen for teaching and recording according to the present invention.
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的首选实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容更加透彻全面。
In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and comprehensive.
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.
本发明教学录播用锁定画面的方法实施例1：Method 1 for teaching a recording screen for recording and broadcasting in accordance with the present invention:
为了解决传统录播系统由于没有锁定画面导致无法完整录播的问题，本发明提供了一种教学录播用锁定画面的方法实施例1；图2为本发明教学录播用锁定画面的方法实施例1的流程示意图；如图2所示，可以包括以下步骤：In order to solve the problem that the conventional recording and recording system cannot be completely recorded due to the lack of locking the screen, the present invention provides a method for locking the screen for teaching recording and recording. FIG. 2 is a method for implementing the locking screen for teaching recording and broadcasting. The schematic diagram of the process of Example 1; as shown in FIG. 2, may include the following steps:
步骤S210：对视频信号的当前帧的图像与当前帧的上一帧的图像进行图像是否发生变化的比较检测，视频信号为教学录播系统的用户电脑输入的视频信号；Step S210: performing comparison detection on whether the image of the current frame of the video signal and the image of the previous frame of the current frame are changed, and the video signal is a video signal input by a user computer of the teaching recording and broadcasting system;
步骤S220：向教学录播系统反馈比较检测结果；由教学录播系统根据比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。Step S220: feeding back the comparison detection result to the teaching recording and broadcasting system; the teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
具体而言，对于一般的教学录播系统而言，外置电脑即用户电脑，在具体的使用过程中，外置电脑是老师上课讲课用的电脑，在需要录制老师上课电脑的画面时，需要将教学录播系统的录播通道切换到外置电脑通道上，将老师上课的电脑画面录制下来。而教学录播系统的外围设备可以包括摄像头，大部分录制下来的信息都是摄像头拍摄的教学过程的画面，当需要录制外置电脑(老师上课电脑)的画面时，才需要将录播通道切换到录制外置电脑通道。Specifically, for a general teaching and recording system, an external computer is a user's computer. In the specific use process, the external computer is a computer used by the teacher to lecture, and when it is necessary to record the screen of the teacher's computer, it is required. Switch the recording channel of the teaching and recording system to the external computer channel, and record the computer screen of the teacher's class. The peripheral equipment of the teaching and recording system may include a camera, and most of the recorded information is a picture of the teaching process of the camera shooting. When it is necessary to record the screen of the external computer (teacher attending the computer), it is necessary to switch the recording channel. To record an external computer channel.
此外，对于智能交互平板设备而言，外置电脑也可以指智能交互平板一体机内部的电脑，即该内部电脑也可以替代本发明中提到的外置电脑，实现本发明技术方案的相关功能。In addition, for the smart interactive tablet device, the external computer can also refer to the computer inside the intelligent interactive tablet integrated machine, that is, the internal computer can also replace the external computer mentioned in the present invention, and realize the related functions of the technical solution of the present invention. .
对于步骤S210而言，在一个具体的实施例中，步骤S210之前还可以包括步骤：For step S210, in a specific embodiment, the step S210 may further include the following steps:
从第一缓存区提取出当前帧的上一帧的图像；第一缓存区为缓存当前帧的上一帧的视频数据的缓存区；Extracting an image of a previous frame of the current frame from the first buffer area; the first buffer area is a buffer area for buffering video data of a previous frame of the current frame;
从第二缓存区提取出当前帧的图像；第二缓存区为缓存当前帧的视频数据的缓存区。
Extracting an image of the current frame from the second buffer area; the second buffer area is a buffer area for buffering video data of the current frame.
在具体的使用场景中，即在接收到教学录播用户电脑输入的视频信号以后，可以根据视频信号中视频帧的次序，调度输入的视频信号缓存到“视频缓存1”或者“视频缓存2”；其中，在视频信号的某一帧时间内，视频信号存入“视频缓存1”，下一帧则存入“视频缓存2”，以此类推。而视频缓存1和视频缓存2是起到视频数据缓存用，只是二者存放不同帧的视频数据(即第一视频缓存数据和第二视频缓存数据)。In a specific use scenario, after receiving the video signal input by the instruction recording user computer, the input video signal may be buffered to “Video Cache 1” or “Video Cache 2” according to the order of the video frames in the video signal. Wherein, during a certain frame time of the video signal, the video signal is stored in "Video Cache 1", the next frame is stored in "Video Cache 2", and so on. Video buffer 1 and video buffer 2 are used for video data buffering, except that the two store video data of different frames (ie, first video buffer data and second video buffer data).
在一个具体的实施例中，步骤S220中图像是否相同的比较检测步骤具体可以包括：In a specific embodiment, the step of comparing whether the images are the same in step S220 may specifically include:
对当前帧的图像的像素点与上一帧的图像的像素点是否相同进行逐点比较检测；Performing point-by-point comparison detection on whether the pixel point of the image of the current frame is the same as the pixel point of the image of the previous frame;
在检测到像素点不相同的个数大于预设的像素点个数阈值时，确定当前帧的图像与上一帧的图像相比发生变化。When it is detected that the number of pixels is different than the preset threshold number of pixels, it is determined that the image of the current frame changes compared with the image of the previous frame.
在其中一个实施例中，向教学录播系统反馈比较检测结果，教学录播系统根据检测结果将录播通道切换至用户电脑通道或保持当前信号通道的步骤具体包括：In one embodiment, the comparison detection result is fed back to the teaching and recording system, and the step of the teaching recording system switching the recording channel to the user computer channel or maintaining the current signal channel according to the detection result specifically includes:
在比较检测结果为是时，向教学录播系统发送第一控制信号；由教学录播系统根据第一控制信号，将录播通道切换至用户电脑通道。When the comparison result is YES, the first control signal is sent to the teaching and recording system; and the recording and recording system switches the recording channel to the user computer channel according to the first control signal.
具体而言，即在教学录播系统视频内容发生变化时，向教学录播系统发送控制信号；由教学录播系统根据该控制信号，将录播通道切换至用户电脑通道。Specifically, when the video content of the teaching recording system changes, the control signal is sent to the teaching recording and broadcasting system; and the teaching recording system switches the recording channel to the user computer channel according to the control signal.
在其中一个实施例中，向教学录播系统反馈比较检测结果，教学录播系统根据检测结果将录播通道切换至用户电脑通道或保持当前信号通道的步骤具体包括：In one embodiment, the comparison detection result is fed back to the teaching and recording system, and the step of the teaching recording system switching the recording channel to the user computer channel or maintaining the current signal channel according to the detection result specifically includes:
向教学录播系统发送第二控制信号，由教学录播系统根据述第二控制信号将录播通道切换至用户电脑通道或保持当前信号通道；其中，第二控制信号为标志位信号。Sending a second control signal to the teaching and recording system, and the teaching and recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the second control signal; wherein the second control signal is a flag signal.
具体而言，在这个过程中，每检测一次，都会将检测结果或根据检测结果将相应的控制信号反馈给教学录播系统，这个反馈过程是连续不断的。标志位是将检测结果输出给教学录播系统的信号，当检测到第一视频缓存数据中视频
帧的图像和第二视频缓存数据中相应视频帧的图像不同时，说明视频内容发生了变化，将控制信号的标志位置为1，即可通知教学录播系统视频内容发生变化。当检测到第一视频缓存数据中视频帧的图像和第二视频缓存数据中相应视频帧的图像相同时，说明视频内容没有发生变化，将控制信号的标志位置为0，即可通知教学录播系统视频内容没有发生变化。Specifically, in this process, each time the test is performed, the test result or the corresponding control signal is fed back to the teaching and recording system according to the test result, and the feedback process is continuous. The flag bit is a signal for outputting the detection result to the teaching recording system, and when the video in the first video buffer data is detected
When the image of the frame and the image of the corresponding video frame in the second video buffer data are different, it indicates that the video content has changed, and the flag position of the control signal is 1, so that the video content of the teaching recording system can be notified to change. When it is detected that the image of the video frame in the first video buffer data and the image of the corresponding video frame in the second video buffer data are the same, it indicates that the video content does not change, and the flag position of the control signal is 0, so that the teaching recording can be notified. The system video content has not changed.
具体而言，图3为本发明教学录播用锁定画面的方法实施例1中检测视频信号的流程示意图，如图3所示，可以通过检测“视频缓存1”和“视频缓存2”中的视频信号是否有变化(即通过比较“视频缓存1”和“视频缓存2”中的视频帧的像素点是否相同)，以此来判断输入的信号是否为动态画面。其中，由于视频是按帧显示的，例如动画片由很多张静止的动画组成，每一张静止的动画就是一帧图像。在不同的时间连续播放这些静止画面时，如果它们画面不一样，看起来画面就动起来了(即视频信号有变化，为动态画面)；如果这些画面是一样的，看起来画面就还是静止的(即视频信号没有变化，不是动态画面)。可以通过逐点比较视频缓存1和视频缓存2的像素点，如果发现内容不一样，则判断为视频内容有变化。Specifically, FIG. 3 is a schematic flowchart of detecting a video signal in Embodiment 1 of a method for locking a screen for teaching and recording according to the present invention. As shown in FIG. 3, it can be detected in “Video Cache 1” and “Video Cache 2”. Whether the video signal changes (ie, by comparing whether the pixels of the video frame in "Video Cache 1" and "Video Cache 2" are the same), thereby determining whether the input signal is a dynamic picture. Among them, since the video is displayed in frames, for example, an animation consists of a number of still animations, and each still animation is a frame of images. When playing these still pictures continuously at different times, if their pictures are different, it looks like the picture is moving (that is, the video signal changes, it is a dynamic picture); if the pictures are the same, it looks like the picture is still. (ie the video signal has not changed, not a dynamic picture). The pixels of the video buffer 1 and the video buffer 2 can be compared point by point, and if the content is found to be different, it is determined that the video content has changed.
检测开始运行时，可置标志位为0；通过逐点比较视频缓存1和缓存2，如果发现内容不一样时，即可判断为视频内容有变化。在检测到“视频缓存1”和“视频缓存2”的内容相比没有变化时，标志位维持0，否则检测内容的变化量是否超过预设的阈值；如果变化没有超过阈值，标志位维持0，否则标志位置1，下一帧继续检查“视频缓存1”和“视频缓存2”的内容是否有变化。When the detection starts running, the flag can be set to 0; by comparing the video buffer 1 and the buffer 2 point by point, if the content is found to be different, it can be judged that the video content has changed. When it is detected that there is no change in the content of "Video Cache 1" and "Video Cache 2", the flag bit remains 0, otherwise the amount of change of the detected content exceeds a preset threshold; if the change does not exceed the threshold, the flag bit remains 0. Otherwise, the flag is set to 1, and the next frame continues to check if the contents of "Video Cache 1" and "Video Cache 2" have changed.
具体而言，例如一幅1080P(逐行扫描：Progressive scanning)的画面，有1920*1080个像素点，即200多万个，如果检测到“视频缓存1”和“视频缓存2”中有1个像素点不一样，就判断图像内容有变化(视频信号发生变化)，可能会引起误判。为此可以设置为当检测到有N个像素内容不一样时，才确定图像有变化，而这个N的大小是可以根据实际使用过程中，实际调试效果的不同来设置。Specifically, for example, a 1080P (Progressive scanning) picture has 1920*1080 pixels, that is, more than 2 million, if 1 in "Video Cache 1" and "Video Cache 2" is detected, If the pixel points are different, it is judged that the image content changes (the video signal changes), which may cause misjudgment. For this reason, it can be set to determine that the image has a change when it is detected that the contents of the N pixels are different, and the size of the N can be set according to the actual debugging effect in the actual use process.
在一个具体的实施例中，本发明教学录播用锁定画面的方法实施例1还可以包括步骤：
In a specific embodiment, the method embodiment 1 for teaching a recording screen for recording and recording may further include the following steps:
在第二缓存区对当前帧进行数据缓存时，从第一缓存区中提取出当前帧的上一帧的数据，并将提取出的数据输出给教学录播系统；由教学录播系统根据提取出的数据进行视频录制。When the current frame is buffered in the second buffer area, the data of the previous frame of the current frame is extracted from the first buffer area, and the extracted data is output to the teaching recording and broadcasting system; The data is output for video recording.
具体而言，通过调度来控制用于录制的视频信号来自“视频缓存1”或者“视频缓存2”，即将视频数据提取出来用于给录制模块进行视频的录制。在视频信号的某一帧时间内，在输入的视频信号存入“视频缓存1”的过程中，可以从“视频缓存2”提取出相应的视频数据进行录制，以此类推。Specifically, the video signal for recording is controlled by scheduling from "Video Cache 1" or "Video Cache 2", that is, the video data is extracted for recording of the video to the recording module. During a certain frame time of the video signal, during the process of storing the input video signal into "Video Cache 1", the corresponding video data can be extracted from "Video Cache 2" for recording, and so on.
本发明教学录播用锁定画面的方法实施例1，通过信号检测流程，当检测到输入的视频信号有变化时，则发送相应的比较检测结果给录播系统，由录播系统将录播通道切换到相应的通道，可以有效的防止传统录播系统由于没有锁定画面导致无法完整录播的问题出现，无须用户通过手动的“锁定”来切换录播通道，实现教学录播过程的自动化处理。In the first embodiment of the method for recording and displaying a screen for recording and broadcasting in the present invention, when the detected video signal is detected to change, the corresponding comparison detection result is sent to the recording and broadcasting system, and the recording and broadcasting system will record the channel. Switching to the corresponding channel can effectively prevent the problem that the traditional recording and recording system cannot be completely recorded due to the lack of a locked screen, and the user does not need to manually switch the recording channel to realize the automatic processing of the teaching recording and broadcasting process.
本发明教学录播用锁定画面的装置实施例1：Apparatus for teaching a recording screen for recording and playing in accordance with the present invention 1:
基于上述教学录播用锁定画面的方法的技术思想，同时为了解决传统录播系统由于没有锁定画面导致无法完整录播的问题，本发明还提供了一种教学录播用锁定画面的装置实施例1，图4为本发明教学录播用锁定画面的装置实施例1的结构示意图；如图4所示，可以包括：The present invention also provides an apparatus embodiment for locking a screen for teaching and recording, based on the technical idea of the method for locking a screen for teaching and recording, and the problem that the conventional recording system cannot be completely recorded due to the lack of a locked screen. 1, FIG. 4 is a schematic structural diagram of Embodiment 1 of a device for locking a screen for teaching and recording according to the present invention; as shown in FIG. 4, it may include:
信号检测模块420，用于对视频信号的当前帧的图像与当前帧的上一帧的图像进行图像是否发生变化的比较检测，视频信号为教学录播系统的用户电脑输入的视频信号；向教学录播系统反馈比较检测结果；由教学录播系统根据比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。The signal detecting module 420 is configured to compare and detect whether the image of the current frame of the video signal and the image of the previous frame of the current frame are changed, and the video signal is a video signal input by a user computer of the teaching recording and broadcasting system; The recording and broadcasting system feeds back the comparison detection result; the teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
在一个具体的实施例中，信号检测模块420可以包括：In a specific embodiment, the signal detection module 420 can include:
检测模块422，用于对当前帧的图像的像素点与上一帧的图像的像素点是否相同进行逐点比较检测；The detecting module 422 is configured to perform point-by-point comparison detection on whether the pixel point of the image of the current frame is the same as the pixel point of the image of the previous frame;
信号模块424，用于在检测模块422检测到像素点不相同的个数大于预设的像素点个数阈值时，确定当前帧的图像与上一帧的图像相比发生变化，向教学录播系统发送第一控制信号。The signal module 424 is configured to: when the detecting module 422 detects that the number of pixels is not greater than the preset number of pixels, the image of the current frame is changed compared with the image of the previous frame, and the recording is recorded to the teaching. The system sends a first control signal.
在一个具体的实施例中，信号检测模块420，用于在比较检测结果为是时，
向教学录播系统发送第一控制信号；由所述教学录播系统根据第一控制信号，将录播通道切换至用户电脑通道。In a specific embodiment, the signal detection module 420 is configured to compare the detection result to YES.
Sending a first control signal to the teaching and recording system; and the recording and recording system switches the recording channel to the user computer channel according to the first control signal.
在一个具体的实施例中，信号检测模块420，用于向教学录播系统发送第二控制信号，由教学录播系统根据述第二控制信号将录播通道切换至用户电脑通道或保持当前信号通道；其中，第二控制信号为标志位信号。In a specific embodiment, the signal detecting module 420 is configured to send a second control signal to the teaching and recording system, and the teaching recording system switches the recording channel to the user computer channel or maintains the current signal according to the second control signal. a channel; wherein the second control signal is a flag bit signal.
在一个具体的实施例中，本发明教学录播用锁定画面的装置实施例1还可以包括：In a specific embodiment, the apparatus embodiment 1 for teaching the recording and playback screen of the present invention may further include:
第一视频切换模块410，用于将当前帧的上一帧调度到第一视频缓存模块430进行缓存，得到第一视频缓存数据；将当前帧调度到第二视频缓存模块440进行缓存，得到第二视频缓存数据；The first video switching module 410 is configured to schedule the previous frame of the current frame to the first video buffer module 430 for buffering to obtain the first video buffer data, and schedule the current frame to the second video buffer module 440 for caching. Two video buffer data;
第一视频缓存模块430，用于存储第一视频缓存数据；a first video buffer module 430, configured to store first video cache data;
第二视频缓存模块440，用于存储第二视频缓存数据。The second video buffer module 440 is configured to store second video cache data.
在一个具体的实施例中，本发明教学录播用锁定画面的装置实施例1还可以包括：In a specific embodiment, the apparatus embodiment 1 for teaching the recording and playback screen of the present invention may further include:
第二视频切换模块450，用于在第一视频切换模块410对当前帧进行数据缓存时，从第一视频缓存模块430中提取出当前帧的上一帧的数据，并将提取出的数据输出给教学录播系统；由教学录播系统根据提取出的数据进行视频录制。The second video switching module 450 is configured to: when the first video switching module 410 performs data caching on the current frame, extract data of a previous frame of the current frame from the first video buffer module 430, and output the extracted data. The teaching and recording system is provided; the video recording is performed by the teaching recording system based on the extracted data.
为了详细阐述本发明教学录播用锁定画面的装置的结构，特以本发明的而装置应用于智能交互平板为例，说明本发明教学录播用锁定画面的装置的具体的技术实现过程，图5为本发明教学录播用锁定画面的装置一具体实施例的结构示意图。如图5所示：In order to explain in detail the structure of the apparatus for locking a picture for teaching and recording in the present invention, the device is applied to the smart interactive tablet as an example, and the specific technical implementation process of the apparatus for locking the screen for teaching and recording according to the present invention is illustrated. 5 is a schematic structural diagram of a specific embodiment of a device for locking a screen for teaching recording and broadcasting according to the present invention. As shown in Figure 5:
在主板内部，可以通过信号检测装置500检测到输入的视频信号有变化时，发送“第一控制信号”到录播系统，将录播通道切换到外置电脑通道，可以替代前面板的手动锁定按键，做到自动化处理；主板系统可以通过通讯总线通讯，例如可以通过RS232串口，或者通过SPI(Serial Peripheral Interface)总线，不同的通讯总线通讯协议不同，本发明不限定通讯方式，只要接受端和发射端采用一样的协议，即可实现通讯。Inside the main board, when the signal detecting device 500 detects that the input video signal changes, the "first control signal" is sent to the recording system, and the recording channel is switched to the external computer channel, which can replace the manual locking of the front panel. Buttons, automatic processing; motherboard system can communicate through the communication bus, for example, through RS232 serial port, or through SPI (Serial Peripheral Interface) bus, different communication bus communication protocols are different, the present invention does not limit the communication method, as long as the receiving end and Communication can be achieved using the same protocol at the transmitting end.
此外，信号检测装置500也可以在录播系统中实现，功能与主板上的一样，
只是可以独立处理，无需接收主板的命令。此时，信号检测装置的功能可以由录播模块内部具有独立处理视频信号能力的信号处理主芯片来实现。In addition, the signal detecting device 500 can also be implemented in the recording and broadcasting system, and the function is the same as that on the main board.
It can be handled independently, without the need to receive commands from the motherboard. At this time, the function of the signal detecting device can be realized by the signal processing main chip having the capability of independently processing the video signal inside the recording and broadcasting module.
其中，第一视频切换模块用于调度输入的视频信号缓存到第一视频缓存模块或者第二视频缓存模块；具体而言，即在视频数据的某一帧时间内，第一视频切换模块将视频信号的一帧存入第一视频缓存模块，然后将下一帧存入第二视频缓存模块，以此类推。The first video switching module is configured to buffer the input video signal to the first video buffer module or the second video buffer module; specifically, the first video switching module will video during a certain frame time of the video data. One frame of the signal is stored in the first video buffer module, then the next frame is stored in the second video buffer module, and so on.
第二视频切换模块用于调度输出的视频数据来自第一视频缓存模块或者第二视频缓存模块，即将视频数据提取出来用于给录制模块进行视频的录制；在视频数据的某一帧时间内，当输入的视频信号在存入第一视频缓存模块时，第二视频切换模块从第一视频缓存模块中提取相应的视频数据，并将该商品数据输出给录制模块，以此类推。The second video switching module is configured to schedule the output video data from the first video buffer module or the second video buffer module, that is, extract the video data for recording the video of the recording module; within a certain frame time of the video data, When the input video signal is stored in the first video buffer module, the second video switching module extracts corresponding video data from the first video buffer module, and outputs the commodity data to the recording module, and so on.
信号检测模块用于通过比较检测第一视频缓存模块和第二视频缓存模块中的视频内容是否有变化，以此来判断输入的视频信号是否为动态画面；The signal detecting module is configured to detect whether the video content in the first video buffer module and the second video buffer module is changed by comparing, so as to determine whether the input video signal is a dynamic picture;
系统开始运行时，信号检测模块置标志位为0；当检测到第一视频缓存模块和第二视频缓存模块中的内容没有变化时，标志位维持0，否则检测内容的变化量是否超过预设的阈值；如果变化没有超过阈值，标志位维持0；若变化量超过阈值，信号检测模块将标志位置为1(通知教学录播系统视频内容发生变化)，下一帧继续检查是否“视频缓存1”和“视频缓存2”的内容是否有变化。When the system starts running, the signal detection module sets the flag bit to 0; when it detects that the content in the first video buffer module and the second video buffer module has not changed, the flag bit remains at 0, otherwise the detection content changes over the preset. Threshold value; if the change does not exceed the threshold, the flag bit remains at 0; if the amount of change exceeds the threshold, the signal detection module sets the flag position to 1 (notifies the video content of the teaching recording system to change), and the next frame continues to check whether "video buffer 1" "And the content of "Video Cache 2" has changed.
本发明教学录播用锁定画面的装置，通过信号检测模块，当检测到输入的视频信号有变化时，则发送相应的比较检测结果给录播系统，由录播系统将录播通道切换到相应的通道，可以有效的防止传统录播系统由于没有锁定画面导致无法完整录播的问题出现，无须用户通过手动的“锁定”来切换录播通道，实现教学录播过程的自动化处理。The device for locking and displaying the screen for teaching and recording of the invention passes the signal detecting module, and when detecting that the input video signal changes, sends a corresponding comparison detection result to the recording and broadcasting system, and the recording and broadcasting system switches the recording channel to the corresponding The channel can effectively prevent the traditional recording and broadcasting system from being unable to complete the recording due to the lack of the locked screen. It is not necessary for the user to manually switch the recording channel to realize the automatic processing of the teaching recording and broadcasting process.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的
普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that for the field
A person skilled in the art can make several modifications and improvements without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.
Claims (10)
- 一种教学录播用锁定画面的方法，其特征在于，包括以下步骤：A method for teaching a screen for locking a picture, comprising the steps of:对视频信号的当前帧的图像与所述当前帧的上一帧的图像进行图像是否发生变化的比较检测，所述视频信号为所述教学录播系统的用户电脑输入的视频信号；Comparing and detecting whether an image of a current frame of the video signal and an image of a previous frame of the current frame are changed, the video signal being a video signal input by a user computer of the teaching recording system;向教学录播系统反馈所述比较检测结果；由所述教学录播系统根据所述比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。And comparing the comparison detection result to the teaching recording and broadcasting system; and the teaching recording and broadcasting system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
- 根据权利要求1所述的教学录播用锁定画面的方法，其特征在于，对视频信号的当前帧的图像与所述当前帧的上一帧的图像进行图像是否发生变化的比较检测步骤包括：The method for locking a picture for teaching and recording according to claim 1, wherein the comparing detecting step of whether the image of the current frame of the video signal and the image of the previous frame of the current frame are changed comprises:对所述当前帧的图像的像素点与所述上一帧的图像的像素点是否相同进行逐点比较检测；Performing point-by-point comparison detection on whether the pixel point of the image of the current frame is the same as the pixel point of the image of the previous frame;在检测到像素点不相同的个数大于预设的像素点个数阈值时，确定所述当前帧的图像与所述上一帧的图像相比发生变化。When it is detected that the number of pixels different from each other is greater than a preset threshold number of pixels, it is determined that the image of the current frame changes compared with the image of the previous frame.
- 根据权利要求2所述的教学录播用锁定画面的方法，其特征在于，向教学录播系统反馈所述比较检测结果；由所述教学录播系统根据所述比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道的步骤具体包括：The method for locking a screen for teaching and recording according to claim 2, wherein the comparison detection result is fed back to the teaching and recording system; and the recording and recording system switches the recording channel according to the comparison detection result The steps to the user's computer channel or to maintain the current signal path include:在所述比较检测结果为是时，向教学录播系统发送第一控制信号；由所述教学录播系统根据所述第一控制信号，将录播通道切换至用户电脑通道。When the comparison detection result is YES, the first control signal is sent to the teaching and recording system; and the teaching and recording system switches the recording channel to the user computer channel according to the first control signal.
- 根据权利要求2所述的教学录播用锁定画面的方法，其特征在于，向教学录播系统反馈所述比较检测结果；由所述教学录播系统根据所述比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道的步骤具体包括：The method for locking a screen for teaching and recording according to claim 2, wherein the comparison detection result is fed back to the teaching and recording system; and the recording and recording system switches the recording channel according to the comparison detection result The steps to the user's computer channel or to maintain the current signal path include:向所述教学录播系统发送第二控制信号，由所述教学录播系统根据所述第二控制信号将录播通道切换至用户电脑通道或保持当前信号通道；其中，所述第二控制信号为标志位信号。Transmitting, to the teaching and recording system, a second control signal, wherein the teaching and recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the second control signal; wherein the second control signal Is the sign bit signal.
- 根据权利要求1至4任意一项所述的教学录播用锁定画面的方法，其特征在于，对视频信号的当前帧的图像与所述当前帧的上一帧的图像进行图像是否发生变化的比较检测的步骤之前还包括步骤： The method for locking a picture for teaching and recording according to any one of claims 1 to 4, characterized in that whether the image of the current frame of the video signal and the image of the previous frame of the current frame are changed The steps of the comparison test also include the steps:从第一缓存区提取出所述当前帧的上一帧的图像；所述第一缓存区为缓存所述当前帧的上一帧的视频数据的缓存区；Extracting an image of a previous frame of the current frame from the first buffer area; the first buffer area is a buffer area for buffering video data of a previous frame of the current frame;从第二缓存区提取出所述当前帧的图像；所述第二缓存区为缓存所述当前帧的视频数据的缓存区。Extracting an image of the current frame from a second buffer area; the second buffer area is a buffer area for buffering video data of the current frame.
- 根据权利要求4所述的教学录播用锁定画面的方法，其特征在于，还包括步骤：The method for locking a picture for teaching and recording according to claim 4, further comprising the steps of:在所述第二缓存区对所述当前帧进行数据缓存时，从所述第一缓存区中提取出所述当前帧的上一帧的数据，并将提取出的数据输出给所述教学录播系统；由所述教学录播系统根据提取出的数据进行视频录制。When data buffering the current frame in the second buffer area, extracting data of a previous frame of the current frame from the first buffer area, and outputting the extracted data to the teaching record Broadcasting system; video recording is performed by the teaching and recording system based on the extracted data.
- 一种教学录播用锁定画面的装置，其特征在于，包括：An apparatus for teaching a screen for locking a screen, comprising:信号检测模块，用于对视频信号的当前帧的图像与所述当前帧的上一帧的图像进行图像是否发生变化的比较检测，所述视频信号为所述教学录播系统的用户电脑输入的视频信号；向教学录播系统反馈所述比较检测结果；由所述教学录播系统根据所述比较检测结果将录播通道切换至用户电脑通道或保持当前信号通道。a signal detecting module, configured to perform a comparison detection on whether an image of a current frame of the video signal and an image of a previous frame of the current frame are changed, where the video signal is input by a user computer of the teaching recording system a video signal; feeding back the comparison detection result to the teaching recording system; and the teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the comparison detection result.
- 根据权利要求7所述的教学录播用锁定画面的装置，其特征在于，所述信号检测模块包括：The apparatus for locking a picture for teaching and recording according to claim 7, wherein the signal detecting module comprises:检测模块，用于对所述当前帧的图像的像素点与所述上一帧的图像的像素点进行逐点比较检测；a detecting module, configured to perform point-by-point comparison detection on a pixel point of an image of the current frame and a pixel point of an image of the previous frame;信号模块，用于在所述检测模块检测到像素点不相同的个数大于预设的像素点个数阈值时，确定所述当前帧的图像与所述上一帧的图像相比发生变化，向所述教学录播系统反馈所述比较检测结果。a signal module, configured to determine, when the detecting module detects that the number of pixels is different from the preset pixel number threshold, determining that the image of the current frame changes compared with the image of the previous frame, The comparison detection result is fed back to the teaching recording system.
- 根据权利要求8所述的教学录播用锁定画面的装置，其特征在于，The apparatus for locking a screen for teaching and recording according to claim 8, wherein:所述信号检测模块，用于在所述比较检测结果为是时，向教学录播系统发送第一控制信号；由所述教学录播系统根据所述第一控制信号，将录播通道切换至用户电脑通道。The signal detecting module is configured to: when the comparison detection result is yes, send a first control signal to the teaching and recording system; and the teaching and recording system switches the recording channel to the first control signal according to the first control signal User computer channel.
- 根据权利要求8所述的教学录播用锁定画面的装置，其特征在于，The apparatus for locking a screen for teaching and recording according to claim 8, wherein:所述信号检测模块，用于向所述教学录播系统发送第二控制信号，由所述 教学录播系统根据所述第二控制信号将录播通道切换至用户电脑通道或保持当前信号通道；其中，所述第二控制信号为标志位信号。 The signal detecting module is configured to send a second control signal to the teaching and recording system, The teaching recording system switches the recording channel to the user computer channel or maintains the current signal channel according to the second control signal; wherein the second control signal is a flag bit signal.
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