• 정보과학회지
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• 제28권12호
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• pp.82-93
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• 2010

• 정보과학회지
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• 제30권4호
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• pp.9-14
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• 2012

• 정보과학회지
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• 제30권4호
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• pp.22-26
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• 2012

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.825-829
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• 2009

In this paper, we examine the fundamental performance of image coding schemes based on multipulse model. First, we introduce several kinds of pulse search methods (i.e., correlation method, pulse overlap search method and pulse amplitude optimization method) for the model. These pulse search methods are derived from auto-correlation function of impulse responses and cross-correlation function between host signals and impulse responses. Next, we explain the basic procedure of multipulse image coding scheme, which uses the above pulse search methods in order to encode the high frequency component of an original image. Finally, by means of computer simulation for some test images, we examine the PSNR(Peak Signal-to-Noise Ratio) and computational complexity of these methods.

• International journal of advanced smart convergence
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• 제9권3호
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• pp.272-283
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• 2020

Hashtags (#) have received a great deal of attention from academia and industry as an effective digital tool for engaging social media users and facilitating electronic word-of-mouth for brands. We delved into motivations concerning people's brand-related hashtag-posting behavior on social media. The findings revealed three motivations for posting brand-related hashtags on social media: social acceptance, brand altruism, and incentive seeking. Additionally, we examined the relationships between motivations and brand relationship variables. The results showed that social acceptance and brand-related altruism predicted all of the five relationship variables (i.e., brand attitude, brand trust, brand affective and calculative commitment and brand loyalty), while incentive-seeking predicted brand calculative commitment and brand loyalty. The findings of the study provide some meaningful insights into the development of brand communication strategies and help marketers capitalize on social media platforms to achieve higher user involvement.

• 한국통신학회논문지
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• 제35권8B호
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• pp.1150-1158
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• 2010

At present multimedia service composed of voice, data, and video service is prevalent in the Internet. As such, wide-scale penetration of Internet service imposes tremendous pressure to the network infrastructure such as the media servers and links as well as the nodes. In addition, users from a large-scale population require broad bandwidth and high level of QoS. This requires a network with reliable and scalable services to customers, which also necessitates a realistic method for the design of the a media server. In this work, we explore the influence of user's behavior about delay on the performance of media server that takes into account the system and user attributes in a realistic manner. By incorporating user's behavior about the delay-sensitivity, we present an analytic framework for the evaluation of the performance of the media server, via which we illustrate a meaningful intuition in the provision of Internet multimedia service.

• International journal of advanced smart convergence
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• 제10권4호
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• pp.1-13
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• 2021

In today's media environment, TV programmers and advertisers must strive ever harder to attract the attention of audiences. Yet what may be even more crucial is engaging audiences in conversations on social media and nourishing stronger relationships. To provide insights into how to improve audience experiences through social media television coviewing (STVC) behaviors, this study investigates audience motivations for using social networking sites (SNSs) while watching sports program (i.e., social media television coviewing-STVC) and examines relationships between identified motivations and key audience engagement outcomes. The results reveal four motivations for STVC behaviors: sports-related interaction seeking, information seeking, convenience seeking, and socializing. Further, results reveal that sports-related interaction seeking, information seeking, and socializing motivations are significant predictors of satisfaction, investment, and commitment to the program. Audience engagement outcomes are not predicted, however, by convenience seeking or by variables pertaining to SNS-use regarding STVC behaviors.

• 전자통신동향분석
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• 제35권5호
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• pp.92-101
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• 2020

Artificial intelligence (AI) has become the hottest topic in information and communications technology (ICT) in recent years. Along with the advancement of AI technology, technologies such as big data, cloud, and high-speed wired and wireless communication are being applied to existing media areas in earnest, affecting all parts of the media value chain from content production to consumption. AI technology is now spreading across the media industry faster than any other industry. In the future, the gap between those with and without AI technology will widen, further deepening the polarization of the media ecosystem. Media intelligence, which combines media and AI technologies, is now perceived as essential, not optional. In this paper, we examine the current status of technology development and standardization by major domestic and foreign institutions on how AI is being utilized in the media industry. In addition, we discuss what technology should be developed to lead media intelligence.

• 한국통신학회논문지
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• 제41권2호
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• pp.254-262
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• 2016

차량용 레이더 시스템에 대한 수요가 증가함에 따라서, 상호 간섭 문제는 차량 안전을 보장하기 위해 해결해야 할 결정적인 이슈가 되었다. Frequency modulated continuous wave(FMCW) 레이더의 상호 간섭은 잡음 전력 증가의 형태로 나타나며, 이는 간섭체로 인한 타겟 검출의 실패로 이어진다. 기존의 FMCW 레이더의 주파수 추정을 위하여 사용되는 fast Fourier transform (FFT) 기법은 차량용 레이더 간섭 환경에서는 취약하다. 이러한 단점을 극복하기 위하여, 본 연구에서는 간섭환경에서 사용하기 위한 고해상도 주파수 추정 기법을 제안한다. 제안된 알고리즘의 성능을 입증하기 위하여, 77GHz 전방 감시용FMCW 레이더 시스템을 도입하였다. 제안된 기법은 간섭환경에서도 정확하게 주파수를 추정할 수 있는 multiple signal classification, estimation of signal parameters via rotational invariance techniques과 같은 고해상도 알고리즘을 이용한다. 실험결과로부터 제안된 알고리즘이 기존의 FFT 알고리즘에 비해 신호 대 간섭비 측면에서 14 dB 이상의 마진을 가짐을 확인하였다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2011년도 하계학술대회
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• pp.393-395
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• 2011

본 논문에서는 모바일 통신 방송 융합분야는 세계 각국이 서로 상이한 표준을 가지고 있어 해외 시장 진출 시 제품 신뢰성 확보를 위한 해외 현지에서의 테스트가 중요시 되어서 국내 기업의 테스트 비용과 개발기간 면에서 경쟁력 확보의 악재로 작용하고 있다. 따라서 모바일 통신 방송의 세게 각 국 표준의 테스트 인프라를 확보하고 이를 활용하는 테스트의 전반적인 시스템을 구축하여 국내 기업의 테스트 비용 절감 및 개발기간 단축과 다양한 서비스 개발이 가능하다.