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텔레메틱스 단말기 내의 오디오/비디오 명령처리를 위한 임베디드용 음성인식 시스템의 구현
권오일,이흥규,Kwon, Oh-Il,Lee, Heung-Kyu 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.11
In this paper, we implement the embedded speech recognition system to support various application services such as audio and video control using speech recognition interface on cars. The embedded speech recognition system is implemented and ported in a DSP board. Because MIC type and speech codecs affect the accuracy of speech recognition. And also, we optimize the simulation and test environment to effectively remove the real noises on a car. We applied a noise suppression and feature compensation algorithm to increase an accuracy of sppech recognition on a car. And we used a context dependent tied-mixture acoustic modeling. The performance evaluation showed high accuracy of proposed system in office environment and even real car environment. 본 논문에서는 차량 내에서 음성인식 인터페이스를 이용한 오비오, 비디오와 같은 응용서비스 처리를 위해 임베디드형 음성인식 시스템을 구현한다. 임베디드형 음성인식 시스템은 DSP 보드로 제작 포팅된다. 이는 음성 인식률이 마이크, 음성 코덱 등의 H/W의 영향을 받기 때문이다. 또한 차량 내 잡음을 효율적으로 제거하기 위한 최적의 환경을 구축하고, 이에 따른 테스트 환경을 최적화한다. 본 논문에서 제안된 시스템은 차량 내에서의 신뢰적인 음성인식을 위해 잡음제거 및 특징보상 기술을 적용하고 임베디드 환경에서의 속도 및 성능 향상을 위한 문맥 종속 믹스쳐 공유 음향 모델링을 적용한다. 성능평가는 일반 실험실 환경에서의 인식률과 실제 차량 내에서의 실차 테스트를 통해 검증되었다.
權五 건국대학교 1983 論文集 Vol.17 No.1
The purpose of this study is to analyze the theoritical aspects of supply and demand for natural resources and resources nationalism and to find the method for securing a stable supply of industrial raw materials in Kores. The major causes of resource nationalism's are as follows : o the imbalance between supply and demand for factor endowments within the limited world of natural resources. o each countries' natural resources. o unstable international market prices. o the proliferation of international resource cartels. In case of Korea the stable condition of the supply of industrial raw material has attri-buted to the high rate of economic growth during the period 1962∼1972. But the rate of economic growth has teen slowed between 1973 and 1981 due to "The 1st and 2nd Oil Crisis." It toppers that there is a high correlation between the economic growth and the stable resource supply condition. We can find methods of securing resources that can contribute to the maintainence of a stable resource supply condition and in turn, to allibiate the disruptive influence caused by resource nationalism. The main points of the methods may be summarized as follow: o development of domestic resources. o securing resources from overseas. o thechnical Know-How in development of natural resources, o diversifying the types of resources and countrys of origin. o import of developed foreign resources. o resources conservation. o utilize the futures trade facilities. c restructuring industrial organization and economizing the use of domestic natural resources. o development of alternative uses of natural resources. o to collect and analysie the worlds market information. o to adopt on import stock-pile including a buffer stock operation. These methods of securing resources as outlined in this study will meet the minimum requirement of stabilizing the supply of matural resources in Korea. Due to a lack of data and information available on this subject, more research would be required in order to find abetter method of securing natural resources in Korea.