WO2024101487A1 - Lecture recording method for maintaining original resolution and minimizing file size - Google Patents

Abstract

The present invention relates to a lecture recording method for recording a lecture by using a lecture recording system, which includes an input means for inputting an event performed by a lecturer and an action related to the lecture, a video recording element for recording video related to the act of lecturing, and a voice recording means for recording the voice of the lecturer, and the lecture recording method of the present invention comprises the steps of: creating respective files for event information indicating the operation of elements in which the lecturer displays various input acts for the lecture recording system, writing information related to the act of the lecturer writing on a lecture board or, voice information related to the voice in which the lecturer lectures, video information obtained by capturing the state in which the lecturer lectures, and information related to the teaching materials used by the lecturer in the lecture; generating respective files as hypertext markup language data together with time information related to information stored in each file; and storing, in a computer, the generated hypertext markup language data related to the lecture recording.

Description

How to record lectures while maintaining original resolution and minimizing file size

This invention relates to a method of recording a lecture that maintains the original resolution and minimizes the file size. Specifically, the entire lecture is recorded while maintaining the resolution of the content, textbooks, or instructor's writing used in the lecture in the original state. This is about a method to record lectures by minimizing the size of data.

Recently, due to the trend of non-face-to-face contact due to the development of information and communication networks and the spread of infectious diseases, people who want to convey information and people who want to acquire information access the information online and conduct lectures, etc., without contact. Recording and saving on a server, and students receiving and playing the saved multimedia content, frequently occur.

When an instructor delivers a lecture to deliver knowledge to students or an explanation of a product or service to a customer, rather than delivering it directly to the audience, the lecture is recorded and delivered to viewers. For example, the lecturer writes it on a board or in a textbook, etc. When the explanation is given in voice, the camera captures it and saves it on the server as a multimedia file containing audio and video. The learner receives the multimedia file from the server and plays it with a program that can play the multimedia file to watch the lecture. I do it.

As one such method, Republic of Korea Patent Publication No. 10-1421066 (Document 1) discloses an invention titled 'System, method, and recording medium on which computer programs are recorded for providing multimedia content including audio files.'

The invention in Document 1 provides a system for generating synthetic content including videos, photos, and voices. In this invention, synthesized content is created by combining videos or photos with audio related to them.

When the invention of Document 1 is used as a lecture recording method, the lecture data forms a multimedia file combining video and audio, resulting in an excessive file size, and in particular, it is difficult to check text or images in the video included in the file. Even if the image is enlarged for this purpose, there is a problem that it is difficult to check the text or image due to the decrease in resolution.

As another method, Republic of Korea Patent Publication No. 10-1845390 (Document 2) discloses an invention titled 'Online learning coaching device and method based on learning video files obtained using an electronic pen.'

The invention in Document 2 proposes a method of synchronizing the movement data and voice data of the electronic pen used in lectures to create a learning video file and providing this file to users in real time in a streaming manner.

However, in the invention of Document 2, there is no teaching on how to provide teaching materials used in lectures and how to provide lecture videos to students, and also how the learning video files provided in this way can be used for the entire lecture. There is no indication as to whether it will be used for recording.

As described above, in the prior art, in the method of delivering lectures to students online, if the lecture is recorded to form a multimedia file and provided to the students, the multimedia file has a very large file size, which reduces the storage capacity of the server. It must be very large and will act as a large load on the network transmitting the file or the recipient's computer.

Moreover, even if the recipient enlarges the playback screen because it is difficult for the recipient to identify images or text displayed among the video in the multimedia file, the images or text appearing on the playback screen are enlarged beyond the resolution of the multimedia file provided by the server, allowing the viewer There is a problem that it cannot be provided to.

Additionally, there is an inconvenience in that students must be equipped with a specific program that can play multimedia files recorded from lectures.

This invention seeks to provide a method of recording lectures that maintains the original resolution and minimizes the file size. Specifically, the purpose of this invention is to maintain the resolution of the content used in the lecture or the instructor's writing in the original state while recording the lecture in the file. The goal is to provide a way to record lectures while minimizing the size.

The problem to be solved by this invention is, according to this invention, an input means for inputting events performed by a lecturer and actions related to the lecture, a video recording element for recording an image of the act of lecture, and an audio recording element for recording the lecturer's voice. This is achieved by a lecture recording method of recording a lecture using a lecture recording system having recording means.

The lecture recording method according to this invention is:

Event information indicating the operation of elements that indicate various input actions by the lecturer to the lecture recording system, writing information about the lecturer's act of writing on the lecture board or, voice information about the lecturer's lecture voice, and the lecturer's lecture status. Forming the captured video information and information about the teaching materials used by the lecturer into separate files,

generating each file as data in a hypertext markup language along with time information regarding the information stored in each file; and

It includes the step of storing Hypertext Markup Language (HTML) data about the created lecture recording on a computer.

In the lecture recording method of this invention, the various actions of the lecturer, teaching materials, audio of the lecturer's lecture, and video of the state of giving the lecture are stored as separate files, so the capacity of the data saved when recording data about this lecture is saved. By minimizing this, it is easy to store recorded lecture data, and the transmission capacity of the network is minimized when delivering lecture-related data to students.

Moreover, since various data related to the recording of the lecture are stored in the original form, the resolution of the lecture video or textbook is maintained as the original when playing the lecture based on the lecture recording data in the future, so even if the user wants to view the video or textbook by enlarging it, the resolution is high. You can watch it in high resolution.

In particular, since various data about the lecture are stored as hypertext markup language along with time information about the creation of each data, no separate program is required to play the lecture recording, so it can be played using any commonly used web browser. there is.

As an additional feature of this invention, the video recording method according to this invention,

The lecturer's various input actions into the lecture recording system are implemented to include the act of changing the page of the textbook used for the lecture, operating information about the computer used for the lecture, and entering information about the computer used for the lecture. It can be.

Since this event information is stored as a separate file, the recorded file is not stored and played as a large multimedia file, but various data are extracted and played back from each file according to the event information, so the size of the lecture recording file is reduced. Minimized and easy to reproduce.

As a further feature of the invention, the video recording method according to the invention includes:

The writing information may include information about the instructor's act of marking images or characters on textbooks or boards used in lectures.

Therefore, since various information displayed by the lecturer is not included in the multimedia file and recorded and played back, the size of the information related to the lecture recording is minimized, the storage capacity for recording information about the lecture is minimized, and the information for playing the lecture is minimized. Minimize delivery capacity.

Figure 1 is a diagram conceptually showing the configuration of hardware required to implement one embodiment of the lecture recording method according to this invention.

Figure 2 is a diagram conceptually showing the configuration of hardware for recording lectures according to this invention.

Hereinafter, as specific details for implementing this invention, a method related to one embodiment of this invention and a hardware configuration related to implementation of the method will be described.

Throughout the following description and this specification, it is explained that the method of this invention and the embodiments of this invention are related to lectures, and the term lecture explained in this specification refers to the teaching of academics by a teacher to students at an educational institution such as a school. It does not only mean conveying related content, but refers to all cases where the person who owns or acquires the information conveys it to the learner as the subject who wants to accept the information.

Therefore, in this specification, the term instructor is not limited to teachers, and the term learner is not limited to students.

Figure 1 shows an information transmission system between an information device and an information device for creating, storing, and playing a recorded lecture according to a lecture recording method according to an embodiment of the present invention.

The instructor computer 50 refers to an information device that allows the instructor to give a lecture and generate and store various contents and information related to the lecture. Audio information, video information, event information, various operation information of the instructor, and information on the teaching materials used by the instructor generated during the instructor's lecture are recorded as information by the means described in FIG. 2 and input into the instructor's computer 50. It is input through the web server (3) of the lecture server (1) through the network and stored in the database (2).

If a learner wants to take a lecture by playing a recorded lecture, the learner connects to the lecture server (1) using his or her computer (6), and the lecture server (1) accesses the database through the web server (3). The data related to the lecture recording stored in (2) is provided as HTML to the learner's computer (6), and the learner plays the lecture through a web browser on his or her computer (6).

Referring to FIG. 2, a lecture recording system will be described as a configuration of hardware for recording an instructor's lecture.

The lecture recording system includes a screen 20 as a display device, a projector 10 that projects an image on the screen, and an infrared pen as an information input means that is held and used by the instructor and is configured to emit infrared light from the tip of the screen by contacting the screen. (30), it is composed of a camera device 40 configured to capture a reflected image reflected from the screen 20, and a computer 50 to which the camera device and a projector are connected.

The projector 10 has a typical configuration that generates or reproduces images such as the screen of a program running on the computer 50 or various presentation contents and transmits them to the projector 10.

The screen 20 is a regular screen that is installed on the wall of a classroom or conference room and can project and display images as needed. However, the display device referred to in this specification is not limited to the screen 20 and the projector 10, but is connected to the computer 50 as an external device, such as an LCD monitor, and is a screen generated or reproduced by the computer 50. It can also be configured to display .

The camera device 40 is arranged to take pictures toward the screen 20. The camera device 40, like a conventional camera, is a lens mechanism that focuses incident light on an imaging element, and an imaging element that converts the light incident and focused through the lens mechanism into an electrical signal, and includes a CMOS element and an electrical signal from the CMOS element. It is composed of a memory and a processor that processes and stores video data.

In the information input system of this embodiment, the infrared pen 30 is positioned close to the screen, for example, and is used by an instructor conducting a presentation or lecture using an image projected on the screen, such as an action of switching or stopping the image projected on the screen. It is used to control the computer 50 and display characters or figures on the screen.

The infrared pen 30 is provided with an infrared light-emitting element at the tip, etc., and emits infrared light by approaching or contacting the screen 20 or by the instructor's operation.

As an input means for the instructor, in addition to an infrared pen that emits infrared light, a laser pointer may be used, or infrared light parallel to the surface of the screen 20 may be irradiated so that the infrared light is reflected from the instructor's fingers. .

The instructor's voice is input to the computer 50 through the microphone 60. The microphone 60 may be worn or held by an instructor, and may be provided on the computer as a peripheral device of the computer or may be installed at any location in the classroom.

The information input process in the information input system configured as above will be described.

The screen generated by the computer 50 or the image or video played back is transmitted to the projector 10 and projected on the screen 20 through the projector 10. The images displayed on such a screen may be teaching materials used by the instructor.

The camera 40 captures the screen 20, and the captured image is transmitted to and stored in the computer. The instructor's voice input through the microphone 60 is also input to the computer 50 and stored as voice data.

The instructor can cause the infrared pen 30 to emit light by touching a specific point on the screen projected on the screen. The infrared light from the infrared pen 30 is irradiated to the screen 20 so that the image of the infrared light is included in the screen of the image captured by the camera 40, and the computer 50 displays the infrared light from the screen of the image captured by the camera. The image is extracted, the coordinates of the image are calculated, and it is determined that there is information input by the instructor at the point of the coordinates.

If the instructor moves to draw a line on the screen 20 with the infrared pen 30, a series of images of infrared light resulting from this movement are coordinates in a series of screens of images transmitted from the camera 40 to the computer. will be displayed while varying, and the computer determines that the instructor displays a line on the screen of the computer from the points of the image of infrared light whose coordinates continuously change, and displays the image about the line on the screen (20) through the projector (10). ) is included in the image projected.

In this way, information is input into the screen 20 by the instructor.

The entered information is stored as an event regarding the instructor's actions. Information about the instructor's various operating actions on the computer 50 displayed on the screen 20, such as changing pages of a textbook, is stored as event information along with information on the time when the event occurred.

When an instructor writes text or displays an image on the screen 20 using the infrared pen 30, information about the text or image is stored as vector information or image information.

The image captured by the camera 40 is stored in the computer 50 as an image file as image data. In addition, the instructor's actions of inputting various information through the infrared pen 30 are stored as event information as a separate event file.

The video information, audio information, event information, and information about teaching materials stored as above are stored as individual files along with information on the time each information was executed, and are included in the lecture along with data in the hypertext markup language that can be played through a web browser. Form recording information.

In particular, the textbook used in the lecture is stored in its original form, that is, if the textbook is formed as a file such as PDF, Word File, HWP, or PPT, the original format is maintained.

In the method of recording a lecture according to an embodiment of the present invention as described above, various information about the lecture, that is, the instructor's voice, information about various characters or images that the instructor inputs on the board or textbook, and the instructor's textbook or textbook file. Information about computer control actions and images of the instructor giving a lecture on the screen or board are stored as data generated by microphones, cameras, infrared pens, etc., which are means of acquiring the information, and time information is included. Create lecture recording information.

The lecture recording information formed in this way has a very small size compared to the multimedia files formed according to the prior art regarding the lecture, so it is very simple and quick to form, store, transmit, and play the lecture information.

In particular, video information, image or text information input by the instructor, and information in the textbook have a higher resolution than that realized in a multimedia file formed by simply recording the lecture scene, that is, the original resolution, so the learner can When recording a lecture, you can watch the video or image you want to see in high resolution.

As described above, the lecture recording method and the configuration and operation of the necessary hardware according to an embodiment of the present invention have been described. This invention is not limited to the configuration and operation of the embodiment and can be modified in various ways within the scope of the claims. Modification and addition of components are possible.

Claims (3)

Lectures are recorded using a lecture recording system having an input means for inputting events performed by the lecturer and actions related to the lecture, a video recording element for recording images of the lecture activities, and an audio recording means for recording the lecturer's voice. As a method of recording lectures, Event information indicating the operation of elements that indicate various input actions by the lecturer to the lecture recording system, writing information about the lecturer's act of writing on the lecture board or, voice information about the lecturer's lecture voice, and the lecturer's lecture status. A step of forming each file with information about the captured video information and the teaching materials used by the instructor in the lecture; generating each file as data in a hypertext markup language along with time information regarding the information stored in each file; and Step of saving data in hypertext markup language about the created lecture recording on a computer A method of recording a lecture, including: In claim 1, Various input actions by the lecturer into the lecture recording system include the act of changing the page of the textbook used for the lecture, operating information about the computer used for the lecture, and entering information about the computer used for the lecture. , How to record lectures. In claim 1, A method of recording a lecture, wherein the writing information includes information about the lecturer's act of marking images or characters on the textbook or board used in the lecture.

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