• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.17 no.6
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• pp.169-172
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• 2003

A design power supply for car audio installation which uses SCR phase control method is able to get output DC 15[V]-100[A] in US wall outlet restricted to input AC 120[V]-15[A]. As the power supply for car audio is tested, output is DC 15[V]-100[A] in ripple voltage 110[mV].

• Proceedings of the KIPE Conference
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• 2004.07b
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• pp.601-605
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• 2004

A new high efficiency and low profile on-board DC/DC converter for digital car audio amplifier is proposed. The proposed converter shows the continuous input current, no DC excitation current of the transformer, the minimized electro-magnetic interference (EMI), no output inductor, and the low voltage stress of the secondary rectifier diodes. The 60W industrial sample of the proposed converter is implemented for digital car audio amplifier and the measured efficiency is $88.3\%$ at nominal input voltage.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.1095-1098
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• 1999

We have developed a speaker dependent voice command system(VCS) to control the sunroof in the car using RSC-164 VRP(Voice Recognition Processor). VCS consists of control circuits, microphone, speaker and user switch box. The control circuits include RSC-164, input audio preamplifier, memory devices, and relay circuit for sunroof control. It is designed robustly in various car noisy situations like audio volume, air conditioner, and incoming noise when window or sunroof opened. Each two users can control the car sunroof using seven voice commands on the Super TVS model and five voice commands on the Onyx model. It works well when we drive the car at over 100 km/h with the sunroof opened.

• Proceedings of the Korea Society of Design Studies Conference
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• 1999.05a
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• pp.14-15
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• 1999

전통적으로 기존의 제품은 정적인 환경에서의 학습과 언어적인지가 중요시되며, 제품 조작 시에도 커뮤니케이션의 많은 부분을 시각적 인터페이스에 주로 의존한다. 그러나 기술의 진보와, 사회환경의 변화에 따라 많은 제품들이 휴대용 제품으로 변화하고 있으며, 제품의 크기 또한 경박단소화되어 제품의 사용방법이 점점 더 블랙박스화 되어 가고 있다. (중략)

• Journal of Broadcast Engineering
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• v.12 no.3
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• pp.222-229
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• 2007

According to the advancement of multimedia compression technologies, high quality multi-media services are easily found in common life. Along with this situation, 5.1-channel audio service also has expanded the application area to home theater system and car theater system and consumer can easily take a chance to experience the feeling of 5.1-channel audio. On the other hand, terrestrial DMB service has been launched in Korea from Dec. 2005 as a handhold multi-media broadcasting service. However, multi-channel audio was not considered due to the insufficiency of bandwidth and the handhold usage. Lately, MPEG is standardizing high efficiency multi-channel audio compression technology for handheld broadcasting service, and several trial for application is introduced in Europe. In this paper, we would like to explain multi-channel audio compression technology, describe the implementation of the verification system for the multi-channel audio service over T-DMB and investigate the possibility of further realization of the service.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2000.11a
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• pp.171-177
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• 2000

본 연구는 ‘문화적 미래형 감성디자인 개발’을 위한 Car AV시스템 개발 프로젝트의 일환으로서 기존 제품의 사용성 평가와 사용자 관찰 방법 등을 통해 사용 환경과 사용자의 이용 행태에 관해 조사하고, 특히 컨조인트 분석을 통해 사용자의 선호도에 주요한 영향을 미친 신뢰성 있는 속성을 규명하고자 하는데 목적이 있다. 컨조인트 분석 프로세스에서 추출된 독립적인 각각의 속성과 수준들의 조합안을 바탕으로 사용자 선호도 조사를 함으로써 궁극적으로는 최적의 속성과 수준의 조합안을 제시하고자 한다. 또한 컨조인트 분석을 위해서 인터넷을 이용한 조사 시스템 구축과 활용 과정에 대해 살펴봄으로써 이의 실질적인 활용과 문제점에 관해 고찰하고자 한다.

• The Journal of the Acoustical Society of Korea
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• v.27 no.5
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• pp.229-238
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• 2008

Audio tuning improves not only the sound quality of the car audio but also the quality of the completed car itself. However without the subjective assessment on the users' preferences, it is hard to tune the car audio satisfying them. Even though there are lots of factors to be considered to assess the preferences, only a restricted number of factors should be included in the experiment because the total number of experiments increases rapidly as the number of factors in the experiment increases. A large number of factors make it hard to explore the relationship between the sound quality and the sound characteristics and also makes the panels exhausted. In this paper, 8 sound characteristics, each with 2 levels, are considered for the experiment. An orthogonal design of experiment is suggested to reduce the number of experiments from 256 to 16. The analysis of variance is applied to show that Treble is the most significant characteristic of the reproduced sound of the given pop music. Also Deep Bass, SAD, and the interaction between Treble and SAD are found to be significant. For the given classic music, SAD is the only characteristic which turns out to be significant.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06e
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• pp.61-64
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• 1998

• Journal of Korean Electronics
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• v.11 no.7
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• pp.122-125
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• 1991

• Journal of Korean Electronics
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• v.11 no.7
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• pp.126-128
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• 1991