• 디지털콘텐츠학회 논문지
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• 제13권1호
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• pp.31-36
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• 2012

국가 지리 정보 시스템에 의해 국가 기본 지형도가 DXF 포맷으로 제작되어 있고, CAD로 작성된 정보들이 풍부하며 스캐너를 이용하여 쉽게 데이터를 획득 가능함으로 기존의 DXF 파일의 수입은 비용과 시간을 절약한다. 또한, 지형도와 같은 공간 데이터를 GIS를 위한 중간 파일인 PostScript와 같은 포맷으로 변환하여 다른 시스템으로 수출이 가능하도록 하여야 한다. 이를 위해, 본 논문에서는 DXF 포맷으로 작성된 파일을 MVF로 수입하고, 다시 PostScript로 수출하기 위하여 공간 객체 변환기를 구성하는 3개의 단위 모듈인 파일 처리 모듈, MVF 수입 모듈, 그리고 MVF 수출 모듈들을 설계 및 구현하였다. 그리고 DXF 파일로 되어 있는 지형도에 대해서 실제 변환을 검증해 보았다.

• 한국통신학회논문지
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• 제16권11호
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• pp.1027-1036
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• 1991

본 연구는ODIF(Open Document Interchanhe Format) elzhej(Decoder) 및 포스트스크립트(PostScript)변환기를 설계하였다. ASN.1 표기법을 적용하여 기술한 IS 8613에 기초한 ODIF 데이타스트림은 이를 하드카피등의 처리를 위해 적합한 내부구조로 디코드해야 한다. 또한 LBP를 이용한 고품질의 문서로 출력하기 위하여 문서의 내부구조를 포스트스크립트로 변화하는 포스트크립트 변환기를 제안하였다. 이들을 실현하기 위하여 많은 DA(Document Architecture), DAP(Document Application Profile)중에서 PDA(Processable DA) 및 Core 26(DAP 레벨 2)을 연구 대상으로 하였고 ICL(U.K)의 ODIF 데이터스트림으로 시스템의 실행을 확인하였다.

• 융합신호처리학회논문지
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• 제12권2호
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• pp.139-144
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• 2011

The modern digital logic technology does not yet satisfy the speed requirements of real-time DSP circuits due to synchronized operation of multiplication and accumulation. This operation degrades DSP performance. Therefore, the double-base number system (DBNS) has emerged in DSP system as an alternative methodology because of fast multiplication and hardware simplicity. In this paper, authors propose a novel multiplication architecture. One operand is an output of a flash analog-to-digital converter (ADC) in DBNS format, while the other operand is a coefficient in the IEEE standard floating-point number format. The DBNS digital output from ADC is produced through a new double base number encoder (DBNE). The multiplied output is in the format of the IEEE standard floating-point number (FPNS). The proposed circuits process multiplication and conversion together. Compared to a typical multiplier that uses the FPNS, the proposed multiplier also consumes 45% less gates, and 44% faster than the FPNS multiplier on Spartan-3 FPGA board. The design is verified with FIR filter applications.

• International Journal of CAD/CAM
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• 제5권1호
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• pp.83-90
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• 2005

This is a report on a new methodology to manage design knowledge by utilizing a knowledge-based CAD and a prototype system named $C^3$ (Cubic; CAD knowledge Code Capacitor), which is being developed using our methodology. $C^3$ facilitates (i) the automatic generation of a knowledge code for a knowledge-based CAD by processing design documents written in the format near the natural language, such as English or Japanese, and (ii) automatically generation of a design document written in the format near the natural language from the knowledge code. The features of the system facilitate document-based design knowledge management which reduces the designer's load to encode and maintain design knowledge, because it is easier for a designer to treat a natural language description than a coded description.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 II
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• pp.1137-1140
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• 2003

The area of the prototype device is less than 80mm$^2$. Operating with a 60ns clock cycle, the device typically dissipates only 300mW. The full functionality was proven by using the methodical test programs based on typical image processing operations. Also, we realized the whole process from conventional gray image to color image. Format converters, implemented using multidimensional access memories, transfer the data between the processing element array and conventional bit-parallel components in real time. The completed system is fully functional and performs typical low-level image processing tasks at speed exceeding 30 frames of traditional TV system per second.

• 한국지능시스템학회논문지
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• 제22권3호
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• pp.334-340
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• 2012

본 연구는 SOLAS의 ECDIS 강제 탑재규정에 제외되는 소형선에서의 모바일플랫폼 및 저사양 단말기를 이용한 S-57 전자 해도 데이터(ENC) 활용을 위해 Tiled-SENC 포맷을 정의하고, ENC에서 Tiled-SENC로의 자료구조 모델링 및 변환 기술을 개발하고, ENC와 Tiled-SENC 사용시의 성능을 비교하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2126-2130
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• 2003

In the integrated systems, that is integrated digital TV(DTV) internet and home automation, like home server, is needed integration of digital TV video signal and computer graphic signal. The graphic signal is operating at the high speed and has time-divide-stream. So the re-request of data is not easy at the time of error detection. therefore EDAC algorithm is efficient. In this paper, we show a scheme, that is integration of graphic and dtv format signal for DTV monitor display. This paper also presents the efficiency error detection auto correction(EDAC) for conversion of graphics signal to DTV video signal. A presented EDAC algorithms use the modified hamming code for enhancing video quality and reliability. A EDAC algorithm of this paper can detect single error, double error, triple error and more error for preventing from incorrect correction. And it is not necessary an additional memory. In this paper The comparison between digital TV video signal and graphic signal, a EDAC algorithm and a design of conversion graphic signal to DTV signal with EDAC function in DTV system is described.

• 한국공작기계학회논문집
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• 제13권3호
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• pp.30-36
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• 2004

The exchange of model design data among heterogeneous CAD systems is very difficult because each CAD system has different data structures suitable for its own functions. STEP represents product information in a common computer-interpretable form that is required to remain complete and consistent when the product information is needed to be exchanged among different computer systems. However, STEP has complex architecture to represent point, line, curve and vectors of element. Moreover it can't represent geometry data of feature based models. In this study, a structure of XML document that represents geometry data of feature based models as neutral format has been developed. To use the developed XML document, a converter also has been developed to exchange modules so that it can exchange feature based data models among heterogeneous CAD systems. Developed XML document and Converter have been applied to commercial CAD systems.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 춘계학술대회 논문집
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• pp.434-440
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• 2003

The exchange of model design date among heterogeneous CAD systems is a difficult task because each system has different data structures suitable for its own functions. STEP has been able to represent product information as a common computer-interpretable form that is required to remain complete and consistent when the product informant is needed to be exchanged among different computer system. However, STEP has difficult architecture in is representing point, line, curve and vectors of element, more over it can't represent geometry data of feature based models. In this study, a structure of XML document that represents geometry data of feature based models as neutral format has been developed. To use the developed XML document, a Converter has also been developed to exchange modules so that it can exchange feature based data models among heterogeneous CAD systems. Aa for evaluation of the developed XML document and Converter, Solidworks and SolidEdge are selected.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2014년도 제50차 하계학술대회논문집 22권2호
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• pp.503-505
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• 2014

지능형 웹의 확장을 위해 링크드 데이터(Linked Open Data)를 통한 표준화 연구가 활발하게 진행되고 있다. 뿐만 아니라 링크드 데이터는 RDF, SPARQL을 이용한 정보를 더욱 더 지능적이고 다양한 분야에 적용 할 수 있는 방법으로 제시되고 있다. 하지만 이기종 환경에서는 각각 서로 다른 데이터 형식을 지니게 되므로 통합환경을 구축하는데 어려움이 따른다. 이를 위해 본 논문에서는 다양한 이기종 환경에서의 데이터 형식 변환이 가능한 RDF 컨버터를 제안한다. 제안하는 RDF 컨버터는 SPARQL를 비롯한 다양한 질의어로 데이터의 효율적인 분석, 변환이 가능하다. 성능평가를 통해 RDB 데이터 형식 분석과 RDF 데이터 변환에 대한 정확도를 확인하였고 D2RQ와 Jena2의 비교를 통해 서로 다른 RDB 데이터가 D2RQ에서 변환시간이 4.2% 빠르다는 성능을 증명하였다.