• Educational Technology International
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• v.7 no.2
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• pp.45-68
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• 2006

Living in the Information Age, schools and teachers are expected to utilize new information technology in education to make teaching more effective. In Japan, the Ministry of Education, Culture, Sports, Science and Technology (MEXT) has been strongly implementing policies to promote information education (IE) in schools since 1988. According to a survey in 2005 (Japan MEXT, 2005), 100% of high schools in Japan at present have computers and the Internet connections. However, videoconferencing systems have only been introduced only in a small number of schools. This paper is the result of a pilot research to see the effects of using a videoconferencing system in a Japanese high school. The purpose of the research was to clarify the effects of introducing videoconferencing system in a Japanese high school and of utilizing it for conferences with other schools abroad on the studies of global issues. The target students were in the 12th Grade in the year 2006. The counterpart school was an Australian high school in Sydney and the conferences were held in English. International discussions on global warming were conducted between the Japanese and Australian students. Affective competence and cognitive competence were measured using questionnaires and worksheets given to students both before and after the videoconferences. The results showed that both cognitive and affective competences rose after each videoconference. Not only the students who actively participated in the conference but also those who were in the audience showed positive effects. In the field of international cooperation on global issues, especially, the effects were large. These results suggest that in order to teach global issues in which international effort and cooperation are needed, direct contacts with foreign students are effective in increasing student cognitive and affective competences. On the other hand, as English was the main communication tool in the conferences, Japanese students faced a certain difficulty in communication. Also, teachers, especially English teachers, were required to make great efforts to assist students in preparing for the conferences. The effectiveness of an international videoconference depends largely on students' English skills and teachers' efforts.

• ETRI Journal
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• v.37 no.4
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• pp.696-706
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• 2015

This paper presents an achievable secure videoconferencing system based on quantum key encryption in which key management can be directly applied and embedded in a server/client videoconferencing model using, for example, OpenMeeting. A secure key management methodology is proposed to ensure both a trusted quantum network and a secure videoconferencing system. The proposed methodology presents architecture on how to share secret keys between key management servers and distant parties in a secure domain without transmitting any secrets over insecure channels. The advantages of the proposed secure key management methodology overcome the limitations of quantum point-to-point key sharing by simultaneously distributing keys to multiple users; thus, it makes quantum cryptography a more practical and secure solution. The time required for the encryption and decryption may cause a few seconds delay in video transmission, but this proposed method protects against adversary attacks.

• The Transactions of the Korea Information Processing Society
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• v.7 no.7
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• pp.2041-2049
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• 2000

A various multimedia application services are developed wiht techniques of high speed networks and computer. Especially the videoconference system is important and useful in a remote discussion with multiple users. A vidoconferencing system in local area network used in corporation and university is useful and important. A standardization for it should be showed in ITU. Recommendation H.323 describes terminals, equipment, and services for videoconference over communication networks which do not provide a guaranteed Quality of Services for videoconference over communication networks which do not provide a guaranteed Quality of Service. In this paper, we introduce ITU-T H.323 which is the standardization over internet, and show a multipoint videoconferencing system and peer to peer videophone system using the ITU-T H.323.

• 한국정보교육학회:학술대회논문집
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• 2010.08a
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• pp.185-192
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• 2010

The purpose of this paper is to suggest design principles for videoconferencing using an English Native Speaker. For this, Design-Based Research which is emerging newly was applied. During the research period of 3 months, several English classes were recorded. After finishing each class, Korean teacher and Native teacher wrote reflective diary and a researcher implemented interviews to students who had this class. Based on these data, this class was divided into 3 steps which is consisted of before class, under class, and after class. And then a research analysed patterns of this class, errors, and interactivity etc. The result of this paper, because a Korean teacher and students in the classroom meet a Native speaker in the distance through the videoconferencing system, teachers who design this class should consider many aspects due to the complexity of this.

• Journal of information and communication convergence engineering
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• v.21 no.3
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• pp.239-243
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• 2023

Owing to the environment in which it has become difficult to face people, on-tact communication has been activated, and online video conferencing platforms have become indispensable collaboration tools. Although costs have dropped and productivity has improved, communication remains poor. Recently, various companies, including existing online videoconferencing companies, have attempted to solve communication problems by establishing a videoconferencing platform within the virtual reality (Virtual Reality) space. Although the VR videoconference platform has only improved upon the benefits of existing video conferences, the problem of manually summarizing minutes because there is no function to summarize minute documents still remains. Therefore, this study proposes a method for establishing a meeting minute summary system without applying cases to a VR videoconference platform. This study aims to solve the problem of communication difficulties by combining VR, a metaverse technology, with an existing online video conferencing platform.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.6A
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• pp.497-502
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• 2012

In this paper, we present an immersive videoconferencing system that enables gaze correction between users in the internet protocol TV (IPTV) environment. The proposed system synthesizes the gaze corrected images using the depth estimation and the virtual view synthesis algorithms as one of the most important techniques of 3D video system. The conventional processes, however, causes several problems, especially temporal inconsistency of a depth video. This problem leads to flickering artifacts discomforting viewers. Therefore, in order to reduce the temporal inconsistency problem, we exploit the joint bilateral filter which is extended to the temporal domain. In addition, we apply an outlier reduction operation in the temporal domain. From experimental results, we have verified that the proposed system is sufficient to generate the natural gaze-corrected image and realize immersive videoconferencing.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.3
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• pp.79-86
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• 2013

Departments of family medicine at some general hospitals find it difficult to hold regular conferences because they have a small number of faculty members. The recent technological development of videoconferencing has made it possible for these small departments to regularly participate in the conferences held by departments with a larger number of faculty members. The objective of this study was to show the level of satisfaction with and acceptance of our videoconferencing system. One presenting site and four receiving sites participated in the videoconferences, which were held every Monday for three weeks. There were no significant differences in the levels of satisfaction with the videoconferences between faculty at the presenting site and faculty at the receiving sites. In contrast, residents at the receiving sites rated most items related to satisfaction with the videoconferences lower than residents at the presenting site. There were no changes between the pre-test and post-test scores of residents both at the presenting site and at the receiving sites. Despite its limitations, the advantages of joint-videoconferencing among several departments of family medicine were comfort level, time-saving, increasing the number of participants, promoting discussion, and provoking thought.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.7
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• pp.93-99
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• 2015

In this paper, we propose a gaze correction method for realistic video teleconferencing. Typically, cameras used in teleconferencing are installed at the side of the display monitor, but not in the center of the monitor. This system makes it too difficult for users to contact each eyes. Therefore, eys contact is the most important in the immersive videoconferencing. In the proposed method, we use the stereo camera and the depth camera to correct the eye contact. The depth camera is the kinect camera, which is the relatively cheap price, and estimate the depth information efficiently. However, the kinect camera has some inherent disadvantages. Therefore, we fuse the kinect camera with stereo camera to compensate the disadvantages of the kinect camera. Consecutively, for the gaze-corrected image, view synthesis is performed by 3D warping according to the depth information. Experimental results verify that the proposed system is effective in generating natural gaze-corrected images.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.234-237
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• 2007

We report on our experience on utilization of collaborative tools for KISTI high energy physics group. Our main subject will be the new EVO (Enabling Virtual Organization) server that we hosted recently at KISTI. The EVO is a next generation collaborative tool from CalTech high energy physics group with several improvements from its predecessor VRVS (Virtual Room Videoconferencing System). EVO has the same baseline structure as in VRVS. The network of servers lies at the heart of EVO structure and one server called Panda communicates with local clients called Koala.

• International Commerce and Information Review
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• v.8 no.2
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• pp.101-117
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• 2006

"Online Alternative Dispute Resolution" can refer to the use of online methods of dispute resolution to resolve disputes arising either online or offline. The range of disputes covered by online ADR has been broad : from family law to internet domain name disputes : from small transaction to insurance disputes. Online and offline consumer disputes have been a major focus of online ADR sites. This article propsed that the mediator should explain the process and the mediator's role so as to forestall misunderstanding on that score. And mediators should consider including in either usual mediation agreements additional provisions applicable to communications by email. Online ADR sites should be designed 1) to provide a simple, easily understandable process, 2) to provide detailed information on process, cost and speed, 3) to enable users to move between online and offline processes, 4) to have authentication processes for parties and documents, 5) to have automatic translation system for language barriers. And Government should play an important role in assisting people to adapt technically and emotionally to new technology through information, training and ongoing support. The days of live online television-quality videoconferencing have not yet arrived. Until then, we must hone our skills with the written word.