• The Journal of the Korea Contents Association
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• 제10권9호
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• pp.36-44
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• 2010

In this paper, we propose video quality control system(VQCS) which can control video service quality through the monitoring of end-to-end available bandwidth for video streaming service like IPTV in NGN convergence network. Various multimedia services such as video, voice and gaming service can be provided by IPTV, and these services require large amounts of bandwidth. At this time, video quality degradation like video jerkiness, block distortion and blurring is caused when network available bandwidth is insufficient. Available bandwidth monitoring method is need to stably control video streaming quality. So, we periodically calculate the amount of the packets in link and measure available bandwidth by using total length field in IP header at terminal. Scalability extractor in network selects suitable video streaming data rate based on available bandwidth and transports video streaming with adaptive data rate to prevent video quality deterioration.

• Information Systems Review
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• 제25권4호
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• pp.67-87
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• 2023

Many online shopping sites now offer personalized recommendation systems to improve consumers' shopping experiences by lowering costs (time, cost, etc.), catering to consumers' tastes, and stimulating consumers' potential shopping needs. So far, domestic and foreign research on the personalized recommendation system has mainly focused on the field of computer science, which is advantageous for obtaining accurate personalized recommendation results for users but difficult to continuously track the users' psychological states or behavioral intentions. This study attempted to investigate the effect of the characteristics of the personalized recommendation system in the online shopping environment on consumer perception and purchase intention for consumers using the Stimulus-Organism-Response (S-O-R) model. The analysis results adopted all hypotheses on the effect of the quality of the personalized recommendation system and information quality on trust and perceived value. Through the empirical results of this study, the factors influencing consumers' use of personalized recommendation system can be identified. In order to increase more purchase, online shopping companies need to understand consumers' tastes and improve the quality of the personalized system by improving the recommendation algorithm thus to provide more information about products.

• Digital Contents
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• 1호통권152호
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• pp.104-113
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• 2006

정보통신부가 후원하고 한국데이터베이스진흥센터가 주관한 '공공정보 활용 촉진에 관한 법률(안)(이하 공공정보 활용 촉진법)제정을 위한 공청회가 지난달 23일 프레스센터에서 열렸다. 이미EU, 미국 등 선진각국에서 공공정보의 재이용에 관한 법제화가 진행되고 있는 가운데 마련된 이번 공청회에서는 정보서비스 관련 사업자,시민단체,대학교수 등 사회 각계의 전문가들이 패널로 참여해 공공정보 활용 촉진 필요성과 향후 법률 제정 방향에 대한 심도 있는 토론을 펼쳤다. 특히 패널들은 공공정보 활용의 취지에 대해서는 일치된 견해를 보인 반면 법률(안)에서 담고 있는 민간사업자의 의무 권리부문등 각론에 들어가서는 이견을 보이기도 했다.

• Journal of Broadcast Engineering
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• 제26권6호
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• pp.714-724
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• 2021

The point cloud content is immersive content recorded by acquiring points and colors corresponding to the real environment and objects having three-dimensional location information. When a point cloud content consisting of three-dimensional points having position and color information is enlarged and rendered, the gap between the points widens and an empty hole occurs. In this paper, we propose a method for improving the quality of point cloud contents through inverse transformation-based interpolation using depth information for holes by finding holes that occur due to the gap between points when expanding the point cloud. The points on the back are rendered between the holes created by the gap between the points, acting as a hindrance to applying the interpolation method. To solve this, remove the points corresponding to the back side of the point cloud. Next, a depth map at the point in time when an empty hole is generated is extracted. Finally, inverse transform is performed to extract pixels from the original data. As a result of rendering content by the proposed method, the rendering quality improved by 1.2 dB in terms of average PSNR compared to the conventional method of increasing the size to fill the blank area.

• KIPS Transactions on Computer and Communication Systems
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• 제1권1호
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• pp.29-34
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• 2012

Wireless multicast service can be used for video streaming service to save the network resources by sending the same popular multimedia contents to a group of users at once. For better multimedia streaming multicast service, we propose a quality-aware rate adaptation (QARA) scheme for scalable video multicast in rate adaptive wireless networks. In QARA, transmission rate is determined depending on the content's type and users' channel conditions. First, the base layer is transmitted by a low rate for high reliability. That means we provide basic service quality to all users. On the contrary, the transmission rate for enhancement layer is adapted by using channel condition feedback from a randomly selected node. So, the enhancement layer frames in a multimedia content is sent with various transmission rates. Therefore, each node can be provided with differentiated quality services. Consequently, QARA is capable of serving heterogeneous population of mobile nodes. Moreover, it can utilize network resources more efficiently. Our simulation results show that QARA outperforms utilization of the available transmission rate and reduces the data transmission time.

• The Journal of the Korea Contents Association
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• 제11권7호
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• pp.80-88
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• 2011

It is no simple matter to measure and manage the quality of Software which is invisible. However the importance cannot be ignored as the software development project is getting bigger and complex. This study analyses and compares the methods of software quality improvement. Further it formulates rules for Code Inspection and verifies the efficiency and the effectiveness by applying to practical project. The study get the following results. First, the study organizes theoretical content about the methods of Software review. Second, the study formulates rules for Code inspection and demonstrates the result through the case study. Third, the study performs the quantitative dater management through code inspection.

• Journal of Digital Contents Society
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• 제16권6호
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• pp.935-941
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• 2015

The maritime industry has been developing e-Navigation strategy for safety navigation. The implementation of e-Navigation strategy will cause many needs for developing new software increasingly. For this reason, IMO referred to importance of software quality and endorsed the e-Navigation SQA/HCD guideline as an official IMO document. Accordingly, it is necessary to develop a practical guidance to apply the guideline. This paper describes the elicitation results about the detailed actions of requirement analysis stage based on quality standards. Also, the improvement measure is proposed in this paper.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• 제16권5호
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• pp.159-175
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• 2021

This study attempted to analyze the relationship between influencer's characteristic factors such as professionalism, authenticity, and interactivity and content quality factors consisting of accuracy, completeness, and diversity on brand attitude and purchase attitude through trust and self-consistency. To reveal the structural relationship between main variables, a survey was conducted on 201 users. An EFA, CFA, and reliability analysis were performed to confirm reliability and validity. And structural equation was conducted to verify hypothesis. The main results are as follows. First, it was found that professionalism and interactivity had a significant positive effect on trust. And, accuracy, completeness, and variety were all found to have a significant positive effect on trust. Second, in the relationship between individual characteristic factors and self-consistency, it was found that professionalism and authenticity had a significant positive effect on self-consistency. In addition, in the relationship between content quality and self-consistency, accuracy, completeness, and diversity were found to have a positive effect on self-consistency along with trust. Third, in the relationship between trust and self-consistency on brand attitude and purchase intention, both trust and self-consistency were found to have a statistically significant positive effect on brand attitude. It was found that only self-consistency and brand attitude had a statistically significant positive effect on purchase intention. These findings showed that when users perceive professionalism and interaction with influencer, trust increases, and professionalism and progress increase self-consistency with influencer. In addition, in the case of content quality, it was found that trust and self-consistency responded positively when perceived content quality through content accuracy, completeness, and diversity. Also, trust and self-consistency increased attitudes toward brands and could influence consumption behavior such as purchase intention. Therefore, for effective marketing performance using influencer's influence in the field of influencer marketing, which has a strong information delivery on products and brands, not only personal characteristics such as professionalism, authenticity, and interactivity, but also quality of content should be considered. The above research results are expected to suggest implications for marketing strategies and practices as one available basic data to exert the expected effect of marketing using influencer.

• Journal of the Korea Institute of Information and Communication Engineering
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• 제26권1호
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• pp.153-161
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• 2022

This paper analyzes the economic effects when platform provider including CP contributes to broadband universal service and uses broadband bandwidth providing high quality network service. In this model, the contribution rate of broadband universal service is determined by ISP and platform provider sets its price of contents. The main results are as follows. First, the traffic usages is less than social optimum when the market of contents is monopoly. The sum of contribution fee and network usage rate must be less than marginal cost of network operation to get social optimum traffic. Second, the rate set by ISP is equal to social optimum when the market of contents is competitive. Third, when platform provider does not charge contents provided, ISP sets social optimum prices and the network usage rate for contents user is decreasing as advertisement revenue becomes larger. These results suggest that the platform provider should contribute to universal service funding to encourage the network investment of ISP.

• Proceedings of the Korea Contents Association Conference
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.360-364
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• 2007

Interoperability between heterogeneous domains is a very important point considered in the field of scholarly information service as well information standardization. In case of the large information system, interoperability between internal information resources becomes to affect the performance of the whole system. The automatic method for understanding heterogeneous system environment will be very helpful to solve the problems like this. This paper shows that automatic method for interoperability between heterogeneous scholarly classification code structures will be effective in enhancing the information service system.