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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Digital Contents Society
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Digital Contents Society
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Volume & Issues
Volume 6, Issue 4 - Dec 2005
Volume 6, Issue 3 - Sep 2005
Volume 6, Issue 2 - Jun 2005
Volume 6, Issue 1 - Mar 2005
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Performance of Wireless Network for Multimedia Services in MIMO Partial Band Channel
Roh Jae-Sung ; Cho Sung-Joon ; Kim Chun-Gil ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 137~142
CDMA scheme has received a great deal of attenttion as a multiple-access method for future mobile networks. Its main advantage: are higher radio capacity and the capacity of flexible data tranmission. And CDMA scheme is a key technology in the proposals submitted to the ITU on next generation multimedia system with integrated services, namely real-time voice services and non real-time data services. In this paper, capacity evaluation of multiple-input multiple-output(MIMO) Multi-Carrier(MC)/CDMA system is considered to mitigate multiple access interference, partial-band interference and enhance system channel capacity in wireless channel. Recently, to increase the spectrum efficiency and the link reliability, MIMO-MC/CDMA scheme is devised to exploit multi-path in a scattering wireless channel. In particular, the channel capacity of MIMO-MC/CDMA system is evaluated according to Eb/No. Mc, p and B. From the results, in order to inappropriate spacing and the signals are frequency overlapped by partial band interference, the channel capacity of MIMO-MC/CDMA system becomes substantially smaller.
Development of X-internet frame work based on FLASH
Ko Dae-Sik ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 143~147
In this paper, we developed X-internet framework based on Flash and API for this framework. Proposed X-internet framework based on Flash enables to obtain design with dynamic user interface compare to web application and enables to reduce development time. Since this framework use the API that we developed in this study art flash player, this framework does not need server module. In analytical results, it has been shown that proposed x-internet framework have efficient characteristics such as network traffic, low development cost and dynamic user interface implementation. Since this X-internet framework can operate in environment of current developer friendly, it is useful for development of various new application programs.
A study on the System for Online education by Mobile
Song Eun-Jee ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 149~155
The various kinds of contents have been developed with the explosive increase of the internet users. The advantage of the contents could be extended to the extension of education. For the reason of no limit on space, on-line education such as cyber lecture and cyber university is getting popular. On-line education, however, could be faced to the problem of the management for attendance, homework and the exam. Therefore the proper supervision is requested so that students may get all the information for the calendar of test and other program which are necessary for the lesson. This study is to propose the system of education by mobile which is able to promote the efficiency of the study for the on-line education. The information of the lesson for cyber lecture could be accessed regardless the place and time by using the mobile phone which is usually carried.
Real-Time Stereoscopic Image Conversion Using Motion Detection and Region Segmentation
Kwon Byong-Heon ; Seo Burm-suk ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 157~162
In this paper we propose real-time cocersion methods that can convert into stereoscopic image using depth map that is formed by motion detection extracted from 2-D moving image and region segmentation separated from image. Depth map which represents depth information of image and the proposed absolute parallax image are used as the measure of qualitative evaluation. We have compared depth information, parallax processing, and segmentation between objects with different depth for proposed and conventional method. As a result, we have confirmed the proposed method can offer realistic stereoscopic effect regardless of direction and velocity of moving object for a moving image.
Methods to System Integration in Distributed Heterogeneous Environments
Kim Jong-Bae ; Song Jae-Young ; Rhew Sung-Yul ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 163~168
Computing infrastructures and technologies are moving into the distributed environments. Due to increase of M&A, and outsourcing processes, or increase or development of various system in an organizations, there are various problems resing such as difficulties in maintenance and repairment, repetition or inconsistency of data, and lacks of interconnection between different of difficulties in financing and selecting an adequate solutionas. This study presents a method to integrate systems adopting massage middleware as an efficient alternative for integration of applications and data between different models under distributed system environments. We expect that the integration method presented in this study, adopting massage middleware between system, will be an efficient alternative to build up interface between small system in terms of expense and efficiency.
Design and Implementation of JPEG Image Display Board Using FFGA
Kwon Byong-Heon ; Seo Burm-Suk ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 169~174
In this paper we propose efficient design and implementation of JPEG image display board that can display JPEG image on TV. we used NAND Flash Memory to save the compressed JPEG bit stream and video encoder to display the decoded JPEG mage on TV. Also we convert YCbCr to RGB to super impose character on JPEG image. The designed B/D is implemented using FPGA.
A Sturdy of Motion detection using image processing from the VR
Kang Soung-Yun ; Kim Yun-Ho ; Kang Heau-Jo ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 175~178
Wirtual reality(VR) is both one of the high-technology and main paradime in leading next genaration of 21th century. It`s application spectrum is various and lead to numorous revolotion as well as transtion in technical aspect. These change is a good procept of it`s comes to receive at real-time tracking using Web-Cam. The method research which is the possibility of doing location tracking which is accurate.
A Study on Spectrum with Cognitive Radio for Real-time Streaming Transmission
Lee Sang-Heon ; Kang Heau-Jo ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 179~184
We concern practical of utilizable frequency with wireless communication and broadcast technology. And, present that wireless application technology such of Ubiquitous sensor network, mobile or fixed wireless communication and wireless broadcast will require more efficiently using of frequency. In this paper, we studied Cognitive Radio That necessity of cognitive and intelligent technology in variable wireless environment and IEEE 802.22 standardization.
A Study on the Illegal Reproduction Prevention for Copyright Protection of Virtual Reality Contents
Kim Tae-Wook ; Lee Yang-Sun ; Kang Heau-Jo ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 185~188
In this paper, we propose a device to track the location of illegal reproduction and monitor illegal reproduction by testing with digital watermark in order to protect copyright of digital contents and prevent massive distribution through illegal reproduction.
A Study on the Real Time University System
Kang Min-Shik ;
Journal of Digital Contents Society, volume 6, issue 3, 2005, Pages 189~193
The Korean University faced the rapid challenge of M&A. The Korean Government had a evaluation of all Universities and colleges. This paper investigated the transactional and real time properties of the University Evaluation Indexes and suggested these indexes to the BI(Business Intelligence) system contents.