• KIISE Transactions on Computing Practices
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• v.20 no.11
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• pp.592-597
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• 2014

In this paper, we propose an adaptive transformation engine that provides smart devices with optimal user interfaces and media contents to their characteristics so as to conveniently control home networks remotely using smart devices in the wired and wireless home networks which various kinds of smart devices and home network devices are connected. The proposed engine dynamically transforms UI contents and transfers them using device profiles and UI transformation policies to make it suitable for smart devices. Moreover, the proposed engine offers suitable media contents for smart devices through capabilities of real-time media transcoding and streaming considering device and media profiles.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2004.11a
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• pp.27-30
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• 2004

본 논문에서는 사용자의 다양한 이질적인 사용 환경(단말기기, 네트웨크 품질 등)에 최적화된 멀티미디어 컨텐츠를 제공하는 시스템에 대해 제안한다. 제안된 시스템은 MPEG-21 멀티미디어 프레임워크를 기반으로 한다. 시스템은 클라이언트, 미디어 서버, 적응 변환 서버, 그리고 툴 서버로 구성된다. 또한 제안된 시스템은 사용자의 사용 환경 정보를 분석하고, 생성하는 사용 환경 정보에이전트 모듈과, 이를 받아 분석하는 정책 결정 엔진 모듈, 그리고 이를 제어하고 관리하는 제어모듈도 제공된다. 구성된 시스템에 대해 MPEG-2 교육 방송 컨텐츠에 대해 다양한 사용환경에 대해 적용하여 제안된 MPEGB-21 기반 서비스 시스템이 유효함을 확인하였다.

• The Journal of the Acoustical Society of Korea
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• v.32 no.4
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• pp.329-334
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• 2013

Order spectrum analysis is widely used to grasp the features of noises due to powertrain system including engine and intake/exhaust system. It is known from many previous researches that order components related to the first and second firing frequencies of engine considerably affect the noise of car interior. The purpose of this paper is to find out the difference in sound quality: Pleasantness of car interior noise according to the change of its order spectrum. For this, car interior noises of 6-cylinder and 4-cylinder engines are recorded and their order spectrum levels are modified by applying adaptive digital filters. After subjective listening test employing paired comparison method is conducted, it is investigated that the level change of half-order components is a noticeable factor to improve Pleasantness of the car interior noises whereas level decrease of firing order does not always give the positive effect on its sound quality.