• ETRI Journal
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• 제34권1호
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• pp.17-23
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• 2012

This paper analyzes the feasibility of a new 3DTV broadcasting service scenario via Advanced Television Systems Committee Mobile/Handheld (ATSC-M/H). We suggest a dual-channel system in which a left-view image is encoded by MPEG-2 with HD quality and a small-sized right-view image is encoded by AVC. Also, the left view is transmitted through ATSC main channel and the right view is transmitted through ATSC-M/H channel. Although the transport stream formats of two channels are different from each other, we demonstrate that it is possible for the ATSC 2.0 decoder to synchronize the display of the left and right views when both encoders use a common wall clock and time stamp. We also propose a program specific information descriptor which guarantees full compatibility with the conventional 2D HDTV and emerging mobile TV services. Finally, we provide the results of subjective visual quality assessment of the proposed system in support of its 3DTV service quality.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 추계종합학술대회
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• pp.483-486
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• 2001

방송과 통신의 정보 인프라가 디지털로 변화되면서, 현재까지 접하지 못했던 다양한 종류의 서비스와 방송 프로그램들이 제공이 가능해 진다. 새로운 방송 컨텐츠 서비스의 제공에 있어서 효율적인 기술 개발 뿐만 아니라, 고급 디지털 컨텐츠의 생산 또한 중요한 부분이다. 그러나 많은 비용과 시간, 그리고 노력을 투자한 디지털 컨텐츠가 불법 복제와 불법 유통으로 인해 투자한 만큼의 경제적 이익을 얻을 수 없는 경우에는 컨텐츠 창작의 의지가 위축되어 고품질 다기능 디지털 방송 서비스의 성공 또한 어렵게 된다. 이러한 문제점으로 인하여 컨텐츠 보호 및 관리를 위한 다양한 활동들이 진행 중에 있다. 그러나 이러한 활동들은 일반적인 인터넷 환경을 기본으로 기술 개발이 진행되고 있어, 디지털 방송 환경이 지니는 특징들을 적절히 반영하고 있지 못한 상황이다. 본 논문에서는 방송 환경에서의 컨텐츠 보호 및 관리 프레임워크를 제안한다. 우선 방송 환경이 지니는 특성을 분석하고, 그 결과를 바탕으로 보호 및 관리 프레임워크가 지녀야 하는 기능들을 정리한다. 그리고 그 정리된 기능들이 구성될 수 있는 방송 환경 모델에 대하여 제시한다.

• IEIE Transactions on Smart Processing and Computing
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• 제3권5호
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• pp.325-330
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• 2014

The era of convergence is being applied to all areas of Information and Communication Technology (ICT). The convergence of broadcasting service and communication service almost occurs on smart devices including smartphone. The smart hybrid Digital Multimedia Broadcasting (DMB) is a typical example of the convergence of broadcasting and wireless communication service. The hybrid mobile broadcasting service can support seamless video, 3D, high quality, and additional data services based on network connection between the broadcasting and wireless network. The gateway and terminal (including apps on the smartphone) take the role of the main components on the hybrid service. This paper presents the service concept, main components structure, the implementation of gateway and terminals, and field test to the urban areas for the mobile hybrid system.

• 한국콘텐츠학회논문지
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• 제19권12호
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• pp.249-258
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• 2019

미디어 기술의 진화는 지상파방송뉴스프로그램도 다양한 매체 및 플랫폼의 뉴스콘텐츠와 경쟁해야 할 상황에 노출시키고 있다. 변화하는 미디어 환경은 지상파뉴스 프로그램의 질적 향상과 시청률 제고를 위한 새로운 전략적 돌파구 마련을 요구하고 있다. 이 연구에서는 지상파방송뉴스가 사회의 공론장으로 기능하기 위해 요구되는 두 가지 요건, 즉 뉴스의 품질과 시청자의 선택의 상관관계를 살펴보았다. 지상파 종합뉴스의 기사에 대한 내용분석을 통해 질적 수준을 측정하고 개별 기사 단위의 시청률 데이터를 수집하여 양 자의 상관관계 분석을 실시하였다. 분석결과를 토대로 뉴스 프로그램의 공정성과 심층성의 하위 요인과 시청률의 관계성도 검토하였다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.201-214
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• 2008

IPTV services, as the convergence service of communication and broadcasting, are regarded as the essential information communication media in the New Economy era by providing the consumers with various services through the collaboration among communications, broadcasting and many of other media service providers. The research starts with recognition that, in the new media era, where communication and broadcasting are converging, there are endless demands for new services and various contents, which are driving forces behind the business model of IPTV. In other words, the research expected that customer satisfaction and purchase intention would be different according to the service quality(contents). It was expected that the difference of the perceived service quality(contents) could cause the difference of the process of adopting new technologies. The study on how consumers are satisfied with services provided, and which factors of the service quality have a more significant effect on consumer satisfaction will provide very valuable information for forecasting future trends in the IPTV market. The research tried to investigate factors which influence on consumer satisfaction and loyalty through an empirical survey with real users of IPTV services. Based on the results, the research suggested effective ways of diffusing IPTV.

• 한국멀티미디어학회논문지
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• 제19권5호
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• pp.856-864
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• 2016

Recently, HD transmission was commonplace in the case of the terrestrial broadcasting, furthermore, 4k UHD broadcasts are also being pilot and such as HD contents are common even in smart-phones. Like this, through both the content and audience are in the situation to take advantage of the HD mobile TV, only QVGA video contents are being transmitted in the terrestrial DMB broadcasting. In this paper, introduction plan of HD DMB service for activation of DMB industry will be described in terms of technical, institutional, and policy to overcome the limitations of such as DMB broadcasting. Due to the introduction of HD DMB, high quality contents will be provided to audience and the advertising revenue DMB broadcasters increased so that the market share of DMB in mobile broadcasting be recovered.

• ETRI Journal
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• 제34권5호
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• pp.753-758
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• 2012

As the next-generation video coding standard, High Efficiency Video Coding (HEVC) has adopted advanced coding tools despite the increase in computational complexity. In this paper, we propose a selective bi-prediction method to reduce the encoding complexity of HEVC. The proposed method evaluates the statistical property of the sum of absolute differences in the motion estimation process and determines whether bi-prediction is performed. A performance comparison of the complexity reduction is provided to show the effectiveness of the proposed method compared to the HEVC test model version 4.0. On average, 50% of the bi-prediction time can be reduced by the proposed method, while maintaining a negligible bit increment and a minimal loss of image quality.

• 전자통신동향분석
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• 제34권3호
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• pp.1-12
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• 2019

In the digital era, broadcasting plays a very large role as a means of communication, as it no longer merely provides information or entertainment media. Particularly in the case of the visually and hearing-impaired, broadcasting is the primary means of acquiring information, so its role as a public service needs to be expanded. The development of digital technology enables the quantitative expansion of traditional methods of disability broadcasting, i.e., closed caption, sign language, and descriptive video service, with an acceptable level of quality. In this study, we review the current trends of, and concerns related to, broadcasting services for disabled people, as well as technological trends, and proposals for increasing visibility and accessibility to broadcasting for hearing-impaired people.

• ETRI Journal
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• 제28권5호
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• pp.583-592
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• 2006

Digital broadcasting technology has developed focusing on multi-channel/multi-media, high-definition quality, and mobility-support. Recently, there has been a clear trend toward bidirectional service with the convergence between broadcasting and communication. The broadcasting viewer is no longer simply a passive receptor but has also become an information generator. Currently, the digital multimedia broadcasting (DMB) specifications are the major standard for portable digital broadcasting and have been establishing the overall guidelines for bidirectional service using the MPEG-4 system. While detailed specifications for DMB systems are not well-established for bidirectional service yet, they share the basic concepts underlying the European Eureka-147 Digital Audio Broadcasting (DAB) system. This paper develops key scenarios for bidirectional service in DMB, describes the signal transaction of broadcasting and return channels, and demonstrates typical scenarios using binary format for scenes (BIFS) in the MPEG-4 system.

• ETRI Journal
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• 제26권4호
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• pp.332-343
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• 2004

One of the recent and most significant technical properties can be expressed as "digital convergence," which is helping lead the technical paradigm into a ubiquitous environment. As an initial trial of realizing a ubiquitous environment, the convergence between broadcasting and telecommunication fields is now on the way, where it is required to develop a scalable video coding scheme for one-source and multi-use media. Traditional scalable video coding schemes have, however, limitations for higher stable picture quality especially on the region of interest. Therefore, this paper introduces an adaptive scanning method especially designed for a higher regional-stable picture quality under a ubiquitous video coding environment, which can improve the subjective quality of the decoded video by most-preferentially encoding, transmitting, and decoding the top-priority image information of the region of interest. Thus, the video can be more clearly visible to users. From various simulation results, the proposed scanning method in this paper can achieve an improved subjective picture quality far better than the widely used raster scan order in conventional video coding schemes, especially on the region of interest, and without a significant loss of quality in the left-over region.