• 한국언론정보학보
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• 제33권
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• pp.169-191
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• 2006

이 연구에서는 방송광고 판매제도 개선에서의 경쟁도입이 각 매체의 광고수입에 미치는 영향을 분석하고, 그에 기초해 바람직한 제도개선을 위한 제도적 장치를 추론코자 하였다. 경쟁도입은 방송광고 요금인상과 방송광고비 증가를 초래하며, 이로 인한 사회적 부작용을 제어할 장치가 없다면 언론매체의 다양성과 균형발전이 훼손되고, 여론의 독과점이 촉진되는 부작용을 피할 수 없다. 따라서 방송광고판매에 경쟁체제를 도입하되, 방송법이 규정한 방송의 제작편성과 광고영업의 제도적 분리를 실질적으로 담보할 수 있는 제도적 장치와, 방송광고 요금의 인상과 그로 인한 방송광고비의 증가를 사회적으로 조절할 수 있는 제도적 장치를 갖추는 것이 필요하다. 그 제도적 장치들은 다음과 같은 다섯 가지이다. 첫째, 방송광고 거래의 투명성과 공정성을 유지하는 것이다. 둘째, 방송사의 직접적 광고영업을 금지하고 더 나아가 직접영업 효과를 차단하는 것이다. 셋째, 공영방송이 공적서비스에 전념할 수 있도록 관련 정책을 정비 개선하는 것이다. 넷째, 광고시장에 대한 사회적 개입수단을 운용하는 것이다. 다섯째, 지역방송과 종교방송 등이 공적인 기본 기능을 수행할 수 있도록 최소한의 재원을 적절히 보장하는 것이다.

• 한국콘텐츠학회논문지
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• 제16권11호
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• pp.731-741
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• 2016

출범한 지 5년이 지나고 있는 종합편성채널은 생방송 위주의 생산체계를 구축하고 있다. 생방송 비율이 높다는 것은 뉴스와 시사프로그램의 높은 비중을 의미하는데, 특히 시사프로그램의 생방송 생산방식이 지니는 의미는 중요하다. 종합편성채널의 생방송 시사프로그램은 뉴스보다 속보성에서 앞서면서 시청자들을 그 사건에 참여하는 것처럼 느끼게 하는 동시에 해설, 토론, 추론 등이 뒤섞이는 특징을 지닌다. 생방송 비중이 높은 종합편성채널들은 스튜디오 제작 스태프들을 보유하고 있는 자회사를 설립해 뉴스와 시사프로그램을 생산하고 있으며, 연출자들은 자회사에 소속되어 있다. 종합편성채널들은 재방송 전략을 통해 전체 시청률을 향상시키기 위하여 본방송 시기와 관계없이 재방프로그램을 선정하고 있다. 이는 새로운 프로그램을 개발하기보다는 성공한 프로그램들을 장기적으로 제작하는 생산방식에 영향을 미치며, 노출 다양성 제고를 제한하는 요인으로 작용하고 있다.

• ETRI Journal
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• 제24권4호
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• pp.280-289
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• 2002

In this work, we present a novel approach to the bit allocation problem that aims to minimize overall distortion subject to a bit rate constraint. The optimal solution can be found by the Lagrangian method with dynamic programming. However, the optimal bit allocation for block-based interframe coding is practically unattainable because of the interframe dependency of macroblocks caused by motion compensation. To reduce the computational burden while maintaining a result close to the optimum, i.e., near optimum, we propose an alternative method. First, we present a partitioned form of the bit allocation problem: a "frame-level problem" and "one-frame macroblock-level problems." We show that the solution to this new form is also the solution to the conventional bit allocation problem. Further, we propose a bit allocation algorithm using a "two-phase optimization technique" with an interframe dependency model and a rate-distortion model.

• International Journal of Internet, Broadcasting and Communication
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• 제4권1호
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• pp.13-17
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• 2012

Indexing allows converting raw document collection into easily searchable representation. Web searching by Google or Yahoo provides subsecond response time which is made possible by efficient indexing of web-pages over the entire Web. Indexing process gets challenging when the scale gets bigger. Parallel techniques, such as MapReduce framework can assist in efficient large-scale indexing process. In this paper we propose PDFindexer, system for indexing scientific papers in PDF using MapReduce programming model. Unlike Web search engines, our target domain is scientific papers, which has pre-defined structure, such as title, abstract, sections, references. Our proposed system enables parsing scientific papers in PDF recreating their structure and performing efficient distributed indexing with MapReduce framework in a cluster of nodes. We provide the overview of the system, their components and interactions among them. We discuss some issues related with the design of the system and usage of MapReduce in parsing and indexing of large document collection.

• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.35-41
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• 2018

Smart device has become an affordable main computing resource for robotic ap-plications in accordance with a fast growth of mobile internet environment. Since the computing power of smart device has been increased, smart device based ro-bot system attempts to replace traditional robot applications with laptop-based system. Methodologies for acquisition of remote sensory information and control of various types of robots using smart device have been proposed recently. In this paper, we propose a robot control system using a monitoring program and a communication protocol. The proposed system is a combination of an educa-tional programming oriented robot named EPOR-S. as small service robot plat-form and a smart device. Through a simulation study using image processing, the feasibility of combination of the proposed robot monitoring program and control system was verified.

• International Journal of Internet, Broadcasting and Communication
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• 제11권3호
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• pp.41-48
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• 2019

The Management Discussion and Analysis(MD&A) provides investors with an opportunity to gain insight into the company from a manager's perspective and enables short-term and long-term analysis of the business. And MD&A is an important channel through which companies and investors can communicate, providing a useful source of information for analyzing financialstatements. MD&A is measured by the quality of disclosure and there are many previous studies on the usefulness of disclosure information. Therefore, it is very important for the financial analyst who is the representative information user group in the capital market that MD&A Disclosure Quality is measured in real-time in combination with IT information technology and provided timely to financial analyst. In this study, we propose a method that real-time data is converted to digitalized data by combining MD&A disclosure with IT information technology and provided to financial analyst's information environment in real-time. The real-time information provided by MD&A can help the financial analysts' activities and reduce information asymmetry.

• International Journal of Internet, Broadcasting and Communication
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• 제14권4호
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• pp.80-87
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• 2022

Lack of sufficient battery capacity is one of the most important challenges impeding the development of wireless sensor networks (WSNs). Recent innovations in the areas of wireless energy transfer and rechargeable batteries have made it possible to advance WSNs. Therefore, in this article, we propose an energy-efficient charging of sensors in a WSN scenario. First, we have formulated the problem as an integer linear programming (ILP) problem. Then a utility function-based greedy algorithm named UGreedy/UF1 is proposed for solving the problem. Finally, the performance of UGreedy/UF1 is analyzed along with other baseline algorithms: UGreedy/UF2, 2-opt TSP, and Greedy TSP. The simulation results show that UGreedy/UF1 performs better than others both in terms of the deadline missing ratio of sensors and the total energy consumption of UAVs.

• International Journal of Internet, Broadcasting and Communication
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• 제15권3호
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• pp.203-210
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• 2023

In this paper, we develope a stock trading system that automatically buy and sell stocks in Kiwoom Securities' HTS system. The system is made by using Kiwoom Open API+ with the Python programming language. A trading strategy is based on an enhanced system query method called a Condition-Search. The Condition-Search script is edited in Kiwoom Hero 4 HTS and the script is stored in the Kiwoom server. The Condition-Search script has the advantage of being easy to change the trading strategy because it can be modified and changed as needed. In the HTS system, up to ten Condition-Search scripts are supported, so it is possible to apply various trading methods. But there are some restrictions on transactions and Condition-Search in Kiwoom Open API+. To avoid one problem that has transaction number and frequency are restricted, a method of adjusting the time interval between transactions is applied and the other problem that do not support a threading technique is solved by an IPC(Inter-Process Communication) with multiple login IDs.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2005년도 학술대회
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• pp.117-120
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• 2005

A Digital Broadcasting Satellite (DBS) receiver converts digital A/V streams received from a satellite to analog NTSC A,/V signals in real-time. Multi-tasking is an efficient way to improve the utilization of the processor core in real-time applications. In this paper, we propose a hybrid approach with a balanced trade-off between hardware kernel and multi-tasking programming to increase a system throughput. First, the schedulability of the critical hard real-time tass in the DBS receiver is verified by using a simple feasibility test. Then. several soft real-time tasks are thoughtfully programmed to satisfy functional requirements of the system.

• Journal of Communications and Networks
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• 제18권2호
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• pp.173-181
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• 2016

In this paper, we address a new robust optimization problem in a multiuser multiple-input single-output broadcasting system with simultaneous wireless information and power transmission, where a multi-antenna base station (BS) sends energy and information simultaneously to multiple users equipped with a single antenna. Assuming that perfect channel-state information (CSI) for all channels is not available at the BS, the uncertainty of the CSI is modeled by an Euclidean ball-shaped uncertainty set. To optimally design transmit beamforming weights and receive power splitting, an average total transmit power minimization problem is investigated subject to the individual harvested power constraint and the received signal-to-interference-plus-noise ratio constraint at each user. Due to the channel uncertainty, the original problem becomes a homogeneous quadratically constrained quadratic problem, which is NP-hard. The original design problem is reformulated to a relaxed semidefinite program, and then two different approaches based on convex programming are proposed, which can be solved efficiently by the interior point algorithm. Numerical results are provided to validate the robustness of the proposed algorithms.