• Journal of Digital Convergence
• /
• v.16 no.4
• /
• pp.149-155
• /
• 2018

It has passed the era of Full High Definition Television (FHD) and ended the era of Ultra High Definition Television (UHD). We will talk about the problems caused by the difference in the number of pixels in the TVs and introduce a method to improve them. This method is a method of performing an interpolation method suitable for a given image with Weighted Essential Non-Oscillation (WENO). Thus, it is possible to reduce the distortion of the image and to ensure a better image quality. Therefore, if we use the WENO methodology, when we watch old video material on UHD TV, we can enjoy high definition of UHD TV without changing the number of pixels.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.11 no.3
• /
• pp.201-218
• /
• 2015

The purpose of this study is to verify a causal relationship between social tv services and intended acceptance of social tv service through the SERVQUAL five dimensions which mean generally assessment of superior user. Also I am going to analyze that how factors of intended acceptance of social tv service effect on intended acceptance through perceived usefulness and perceived ease of use based on Technology Acceptance Model which provides theoretical basis for behavior response of information technology. This study is significant that social tv combine the five dimensions of service quality that mean assessment of overall excellent or superior user and Technology Acceptance Model that provides theoretical basis for describing an behavior response of information technology.

• Korean Journal of Optics and Photonics
• /
• v.9 no.5
• /
• pp.291-299
• /
• 1998

In the rear projection TV, the optimal system configurations of optical parts are presented, which are focused on competitive price and performances. From the initial design with five Seidel aberrations free, aspherization of the plastic lenses, and optimization with tolerances, a new lens consisting of two plastic and one glass lenses was designed. It is able to be used on current broadcast standard NTSC and digital TV in common. The developed CRT-lens assembly could display the 40 to 50 inch image and its resolution is more than 800 TV-lines.

• Journal of Digital Convergence
• /
• v.6 no.4
• /
• pp.63-71
• /
• 2008

This study researches the effectiveness of interactive TV advertising focusing on the factors of audience involvement and interaction. The study began with the effective measurement of interactive television advertisements. Interactive television advertisements have different concepts than existing television advertisements. This study mainly focuses on the characteristics of audience interaction and experiments based on the data of 78 persons for measurement. In the experiments, the characteristics were categorized according to search time, specifically the number of searched pages about interactive television advertisement. Hypothesis 1 reveals that the interaction of the audience increases when the advertising attitude, brand attitude, and purchase intentions also increase. Hypothesis 2 finds that the involvement of the audience increases when the advertising attitude, brand attitude, and purchase intentions also increase. By studying these consumer characteristics and behavior, a new method of effective measurement for interactive television advertisement is uncovered. The new method includes not only existing measurement elements of television advertisement which include attitude about advertising and brand, and customer purpose, but also the features of interactive television advertisement like customer search time. According to this research on interactive television advertisement, the interaction with and involvement of the audience are highly influential variables.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.25 no.4B
• /
• pp.613-623
• /
• 2000

Digital TV tuner for 8-VSB modulation was developed with satisfying the requirements of ATSC. The double frequency conversion and the active tracking filter in the front-end were used to reduce interference of the adjacent channels and multi-channels, which suppress If beat and image band. However, it was impossible to get frequency mapping between tracking filter and first VCO(Voltage Controlled Oscillator) in the double conversion digital TV tuner differing from conventional NTSC tuner. This paper, therefore, suggests the available structure and a new method for automatic frequency selection by obtaining the mapping of frequency characteristic over tracking voltage and the combined hardware which compose of Micro-controller, EEPROM, D/A(Digital-to-Analog Converter), OP amp and switch driver to solve above problems.

• Journal of the Korea Society of Computer and Information
• /
• v.17 no.8
• /
• pp.81-90
• /
• 2012

For digital TV, the recommendation of u-health personalized service of semantic environment should be done after evaluating individual physical condition, illness and health condition. The existing recommendation method of u-health personalized service of semantic environment had low user satisfaction because its recommendation was dependent on ontology for analyzing significance. We propose the personalized service recommendation method based on Naive Bayesian Classifier for u-health service of semantic environment in digital TV. In accordance with the proposed method, the condition data is inferred by using ontology, and the transaction is saved. By applying naive bayesian classifier that uses preference information, the service is provided after inferring based on user preference information and transaction formed from ontology. The service inferred based on naive bayesian classifier shows higher precision and recall ratio of the contents recommendation rather than the existing method.

• Convergence Security Journal
• /
• v.11 no.4
• /
• pp.51-58
• /
• 2011

Due to the digital technology, the TV broadcasting platform is evolving to the digital-TV, which is supporting data broadcasting service. Although the data broadcasting services (i.e., games, wether information, stock trading service) provide rich entertainment to viewers, they make the operation manners of digital-TV so complex that some viewers feel difficulty in using their TV sets. Several researches have been performed to address the problem by improving the functions of EPG such as searching and reserving programs, applying gesture and voice recognition technologies to operating EPG, guiding the design of the EPG's user interface, and developing agents helping EPG to behave intelligently. A research, however, that tries to address the problem that viewers have different familiarities with IT services has not been performed yet. The paper tackles the problem by letting a viewer to choose an EPG configuration (among the several EPG configurations provided by a broadcasting network) and designing an EPG that implements an EPG configuration based on the choice.

• Journal of Broadcast Engineering
• /
• v.23 no.6
• /
• pp.824-835
• /
• 2018

In this study, the impact on the number of cable TV subscribers as well as the profit of cable TV has been examined, and the impact on enlarging the digital broadcast viewing rights of cable TV subscribers and viewers' welfare has also been examined. We investigated the trends in the number of analog and 8VSB subscribers and revenue of cable TV operators by region and analyzed based on changes in the number of channels provided by each operator. The results show that analog subscribers and digital subscribers are delaying their departure through 8VSB conversion, and VOD subscription fees and home shopping transmission fees have a significant impact on operating profit. Subscribers, as they switched over to 8VSB, have become able to view channels of various genres with clear picture quality for a same subscription fee, and the program providers could offer programs to more customers. The government's deregulation policy due to the changes in broadcasting environment led to the facilitation of digital conversion of Pay-TV and improvement of viewers' welfare.

• Journal of Korea Multimedia Society
• /
• v.13 no.10
• /
• pp.1413-1422
• /
• 2010

With the emergence of digital TV broadcasting, various channels are provided to a TV audience. But it is getting hard for the audience to find his or her preferred TV programs due to the huge number of TV channels. In order to mitigate the difficulty, TV broadcasting companies provide an electronic program guide (EPG), which is a digital guide to scheduled broadcast TV programs. However, it results in the information overload problem and the time-consuming problem since the number of TV channels and programs is gradually on the increase. In this paper, we design and develop a channel filtering system, which recommends a small number of channels by filtering TV channels based on the watching pattern of the TV audience. The channel filtering system does not require the replacement or upgrade of existing TV or set-top box. In addition, it increases usability by skipping the channels that broadcast the audience's non-preferred TV programs while the TV audience presses the channel up/down button.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.7 no.4
• /
• pp.589-597
• /
• 2003

This paper discusses revenue model of digital TV broadcast service(D-TV) and presents the basic framework for integrated strategy of applications. Also this paper presents the cases of D-TV in the frame of integrated model. The broadcasting operators should focus on interactive advertising and revenue generation utilizing customer participation. Also, they should utilize the strengths as a platform operator. The contents provider should be concerned about the retail revenue rather than commission revenue. The middle ware provider should develop new interactive D-TV service rather than system use fee or consulting fee.