JPH0758942B2 - Distance lecture system - Google Patents

Description

The present invention relates to a remote lecture system for educational purposes.

In particular, it relates to a remote lecture system that uses communication satellites and prepares one lecture for students in a wide area.

[Conventional technology]

As a conventional education system, a system in which a teacher and a student work together as in school education is generally used.
In addition, the lecturer side is
One-way lectures are also common. There is also a distance learning system by mail.

[Problems to be Solved by the Invention]

However, education conducted at school and lectures conducted via broadcasting have essentially different aspects. This means that if there is a question, the question and answer can be done on the spot if there is a question in the education conducted through the group, whereas the question and answer cannot be given in the education by broadcasting or correspondence education. .

In education, the question and answer is important for the teacher to know the level of understanding of the content of the education, and also for the students to solve the questions on the spot, and for other students, the teacher and the student. You can deepen the understanding of the contents by listening to the question and answer with. For this reason, in order to make up for these in broadcasting education and correspondence education, where questions and answers are impossible on the spot, in broadcasting education, questions are collected by mail, aggregated, and answered in the next program. Such a method is also considered. In correspondence education, the question and answer method is used by correction.

However, all of these use postal mail, and there is a problem with immediacy because they are delivered. In addition, in correction, it is an interaction between the instructor and the student individually, so that other students cannot hear the question and answer, and listening to the question cannot deepen the understanding.

On the other hand, if only the immediacy is a problem, a method using a telephone can be considered, but it is not practical because it is necessary to broadcast the educational program itself.

Therefore, considering the educational system, the technical problem of the present invention is to provide one lecture room in view of the fact that what is required is a lecture by a lecturer, an immediate Q & A session, and a Q & A session with the lecturer. By providing a distance learning method that can realize an immediate question and answer between the teacher and the student even when the student is distributed over a wide area as in the case of school education in which the student is gathered. is there.

[Means for Solving the Problems]

According to the present invention, a lecturer transmits a lecturer's voice to various places in a remote lecture system for giving lectures to students dispersed in various places by using a communication satellite, and lectures to a plurality of students. It has a first communication path using a communication satellite for receiving data and a second communication path using a two-way communication terrestrial line, and the second communication line is an up line to the lecturer. A question from the student is flown, a response from the instructor is flown to the student who asked the question, and the first communication path is such that the instructor sends the question from the student and the response from the instructor from the instructor side. A remote lecture system characterized by transmitting to a plurality of students can be obtained.

That is, the distance learning method of the present invention has the conditions of an education system and is a distance lecture for students dispersed in various places. In the present invention, one lecturer gives a lecture to students dispersed in various places using a communication satellite.

The communication satellite can perform bidirectional communication, but in the case of voice, only one-way communication is required. In a remote lecture system that normally uses a communication satellite, images are transmitted and received to improve the educational effect. However, in the present invention, only the audio in the separated form of the image system is handled and discussed.

The present invention is characterized by having a second communication path such as a telephone line in addition to the communication path by satellite. The first communication channel broadcasts the voice of the lecturer to various places and receives the lecture. The second channel is used for questions and answers. The second communication path is usually bidirectional, and a signal from the interrogator is sent to the instructor's upstream line and the instructor's voice is sent to the instructor's side. Will be heard. Since other trainees are listening to the satellite line, the instructor can add the voice of the instructor and the voice of the interrogator and transmit them, so that the questions and answers of the interrogator and the instructor can be attended at the same time. In addition, considering the satellite as the first communication channel is based on the assumption of remote lectures. For example, when considering all of Japan,
In television broadcasting, the area that can be covered by one broadcasting station is small, and it is possible that a large number of broadcasting stations simultaneously broadcast using relay lines, but this is not feasible considering economic efficiency.

The second communication path is assumed to be a telephone line because it is also used as a backup line when the line cannot be used in a satellite circuit due to rainfall or the like.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the flow of a voice signal in each mode state of the remote lecture system according to this embodiment.

T indicates an instructor and S ₁ , S ₂ and S ₃ indicate students. M is a student who does not have the second communication path and can only attend.

In the mode during the lecture, I took a lecture from the satellite line, and in the question, it shows that the question and answer session is between S ₁ and T in this figure. The voice from S ₁ is transmitted to the T side through the telephone line that is the second line, and the voice of the instructor and the voice from S ₁ are added and sent to the satellite line.
Only the voice of the instructor is sent to S ₁ through the downlink of the second line. For S ₂ and S ₃ , the instructor's voice and the voice of S ₁ are added and transmitted through the second line for the purpose of backup, but the voice actually received is the voice from the satellite line.

In the second line, bidirectional telephone lines are set between S ₁ and T, S ₂ and T, and S ₃ and T, respectively. In the figure, the second line to S ₂ and S ₃ is represented by the same line, but is a separate line. M
During the lecture and while S ₁ was asking questions, he could only ask the audio from the satellite line and not ask questions.

The mode when the satellite line breaks down, and the mode when there is a question about the failure can be relieved by the second line as shown in the figure. You cannot attend M.

FIG. 2 is a configuration diagram for realizing the system of the present invention. 1 shows the instructor side studio, and 2 shows the student side site with the second line. 3 is a student side site that only listens. Four
Indicates a satellite line. Reference numeral 5 indicates a second communication line. Reference numerals 6 and 7 denote a transmitting antenna and a receiving antenna. Here, 6 and 7 do not refer to the antenna itself, but to the transmitting and receiving systems including the transmitting and receiving circuits.

Reference numerals 8 and 9 are control systems for asking a question. In the present invention, when there is a question, the interrogator operates a button switch or the like to issue a signal to the instructor side through the up line of the second line. This is detected by the instructor, who is the receiving side, and displayed and shown to the instructor. The instructor can recognize that there is a question on the display. The instructor selects the questioner and gives permission as necessary. When the permission is given, a button switch or the like is operated to input to the blit or selection circuit indicated by 10. If more than one person is to be given permission to the interrogator, the blit function is required, and if only one person is to be given permission, a selection circuit may be used. When permission is given, it is input to the bridge or selection circuit, and at the same time, a control signal is issued to the downlink of the second line, and the student who has the questioner who has been given permission receives the control signal and receives the satellite. The voice signal received from the line is switched to the second communication line side and a question and answer session with the instructor side.

For the satellite line, the voice on the output side of the blit or selection circuit, that is, the content of the interrogator is added to the voice of the instructor and transmitted.

Reference numeral 11 is a speaker system, in which the lecturer listens to the questioner's voice, and the student listens to the lecture content and question and answer content using this speaker system.

12 is a microphone system, and the lecturer side
Also, the student's microphone system is used for questions.
There is no microphone system on the student side only for listening.

Further, when the student side determines that the satellite line is out of order, it is possible to switch it by the student side control without depending on the control signal.

〔The invention's effect〕

As described above, in the present invention, since the teacher side has the transmitting station for the satellite line, the student side only needs to function as the receiving station. Also, by having a second line, you can hold lectures and questions and answers necessary for education. The second line can also be used for backup of the satellite line. By sending the instructor's voice to the satellite line, the lecture and question-and-answer content can be received without asking a question to the station having only the function of the receiving station. Since it is possible to control the selection and permission of the interrogator and the selection of the satellite line by using the second line, there is an effect that economicization can be achieved as a remote lecture system.

[Brief description of drawings]

1 (a) to 1 (d) are diagrams showing the flow of voice in each mode according to the embodiment of the present invention, and FIG. 2 is a system diagram of a remote lecture system according to the embodiment of the present invention. 1 …… Instructor side studio, 2 …… Student side site that can ask questions, 3 …… Student side site only for listening, 4 …… Satellite communication line, 5
…… Second communication line, 6 …… Transmission antenna system, 7 ……
Receiving antenna system, 8 ... Student side control and switching circuit, 9
…… Instructor side control and switching circuit, 10 …… Blitch or selection circuit, 11 …… Speaker system, 12 …… Microphone system.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H04B 7/15

Claims (1)

[Claims] 1. A remote lecture system in which a lecturer uses a communication satellite to give lectures to students dispersed in various places. The lecturer's voice is broadcast to various places to give lectures to multiple students. It has a first communication path using a communication satellite for receiving and a second communication path using a two-way communication ground line, and the second communication line is an upstream line to a teacher. From the instructor, and a response from the instructor is sent to the downlink to the student who asked the question, and the first communication path is such that the instructor sends the question from the student and the response from the instructor from the instructor. A remote lecture system characterized by sending to students.