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변상봉(Sang-Bong Byun),이용환(Yong-Hwan Lee) 한국정보기술학회 2009 Proceedings of KIIT Conference Vol.2009 No.-
기존의 디바이스간 저속 병렬연결 방식은 가격, 전력소모, EMI, 부피 등 많은 단점이 있다. 이러한 단점을 보완한 직렬 인터페이스의 표준인 MIPI(Mobile Industry Processor Interface)[1]가 새로운 인터페이스로 각광받고 있다. 기존의 직렬 인터페이스는 점대 점 연결방식으로 많은 디바이스들이 장착되는 환경에서는 복잡도 증가와 효율성 저하가 발생한다. 그리하여 고속 데이터 전달을 위한 링크 스위치를 사용하여, 모바일 환경에서 다양한 디바이스들 간의 통신이 패킷 스위칭 방식으로 효율적으로 이루어질 수 있도록 한다. Low-speed parallel interface has many shortcomings. The shortcomings are price, power consumption, EMI, bulky dimension. To compensate for these shortcomings, the standard serial interface MIPI(Mobile Industry Processor Interface)[1] has been prominent as a new standard. Existing serial interface using a point to point connection, if it is used in complex system, shows decreased efficiency and increased complexity. Therefore we will using the link switch for high speed data transmission protocol so that communication between various devices in the mobile environment performed by packet switching.
변상봉(Sang-Bong Byun),이용환(Young-Hwan Lee) 한국정보기술학회 2014 Proceedings of KIIT Conference Vol.2014 No.5
최근 컴퓨터 비전 기술의 발전이 빠르게 이루어지고 있다. 그 중 이미지 스티칭 기술은 다양한 분야에서 응용되고 있다. 한 대의 카메라로 촬영한 영상의 해상도를 높이는데 한계가 있다. 본 논문에서는 파노라마 이미지를 위한 하드웨어 알고리즘을 연구한다 특징점을 추출하고 특징점을 매칭한 후 이미지를 병합하고 밝기를 보정하여 이미지 스티칭을 완료한다. Development of computer vision technology recently has been carried out rapidly. The image stitching technology has been applied in various fields. Increasing the resolution of the image taken by a single camera is difficult. In this paper, we study the hardware algorithm for panirama image. The image stitching is performed by detect feature points, matching the feature points, integrating the image and correcting the brightness. The image stitching is required to improve the accuracy of computer vision technology.
변상봉(Sang-Bong Byun),문병인(Byungin Moon),이용환(Yong-Hwan Lee) 한국정보기술학회 2010 한국정보기술학회논문지 Vol.8 No.11
Various multimedia features are widely adopted for high performance mobile devices. Accordingly, fast serial interface with the feature of high-speed operation and low power consumption but small chip area is attractive. Serial interface is being standardized to accomodate various chips in an unified high-speed transmission topology. In addition, the efficiency of data transmission is required for the different priorities. In this paper, based on the layer structure of the PCI (Peripheral Component Interconnect) Express, a low-power general interface for fast data transfer is implemented. In this design, compatibility was improved by using the OSI 7 layers and low power operation was available by a power management unit. The hardware design was verified through FPGA and chip implementations.
모바일 기기내의 효율적인 데이터 전송을 위한 고속 스위치 설계
변상봉(Sang-Bong Byun),이용환(Yong-Hwan Lee) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.2
Smart phones that provide various functions should integrate a variety of chips and devices. Direct connections between various devices need many lines, which result in the increment in volume and the decrement of transmission speed, noise and reliability. In this paper, a design of switch for supporting fast serial interface is presented. The switch has high compatibility using Data Link Layer and Network Layer of OSI 7 layers and can efficiently arbitrate data transmissions between multiple devices. The switch also supports a priority scheme in determining the transmission order according to the requested transmission speeds and improves the integrity of data transmission by detecting error using CRC(Cyclic Redundancy Check) code. The hardware design is verified through FPGA and chip implementation.