H.264/AVC를 위한 CAVLC 엔트로피 부/복호화기의 VLSI 설계

이대준,정용진,Lee Dae-joon,Jeong Yong-jin 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.5C

본 논문에서는 동영상의 실시간 부/복호화를 위한 하드웨어 기반의 CAVLC 엔트로피 부/복호화기 구조를 제안한다. H.264/AVC의 무손실 압축 기법인 내용기반 가변길이 부호화(Context-based Adaptive Variable Length Coding)는 이전 표준의 기법과 다른 알고리즘을 채용하여 높은 부호화 효율과 복잡도를 가지고 있다. 이를 하드웨어 구조로 설계하기 위하여 메모리 재사용 기법을 적용하여 리소스를 최적화 하였으며, 지금까지 제시된 여러 엔트로피 부/복호화 구조 중 휴대용 기기에 적합한 성능 대비 리소스를 가지는 구조를 선택하고 이를 병렬 처리 구조로 설계하여 부호화 성능을 향상시켰다. 구현된 전체 모듈은 Altera사의 Excalibur 디바이스를 이용하여 검증하고 삼성 STD130 0.18um CMOS Cell Library를 이용하여 합성 및 검증하였다. 이를 ASIC으로 구현할 경우 부호화기는 150Mhz 동작주파수에서 CIF 크기의 동영상을 초당 300프레임 이상 처리하며 복호화기는 140Mhz 동작주파수에서 CIF 크기의 동영상을 초당 250 이상 처리할 수 있다. 본 결과는 하드웨어 기반의 H.264/AVC 실시간 부호화기와 복호화기를 설계하기에 적합한 하드웨어 구조임을 보여준다. In this paper, we propose an advanced hardware architecture for the CAVLC entropy encoder/decoder engine for real time video compression. The CAVLC (Context-based Adaptive Variable Length Coding) is a lossless compression method in H.264/AVC and it has high compression efficiency but has computational complexity. The reference memory size is optimized using partitioned storing method and memory reuse method which are based on partiality of memory referencing. We choose the hardware architecture which has the most suitable one in several encoder/decoder architectures for the mobile devices and improve its performance using parallel processing. The proposed architecture has been verified by ARM-interfaced emulation board using Altera Excalibur and also synthesized on Samsung 0.18 um CMOS technology. The synthesis result shows that the encoder can process about 300 CIF frames/s at 150MHz and the decoder can process about 250 CIF frames/s at 140Mhz. The hardware architectures are being used as core modules when implementing a complete H.264/AVC video encoder/decoder chip for real-time multimedia application.

MPEG-4 AVC를 위한 고속 인터 예측기의 하드웨어 구현

임영훈,이대준,정용진,Lim Young hun,Lee Dae joon,Jeong Yong jin 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.3C

본 논문에서는 MPEG-4 AVC 부호화기를 위한 고속 인터 예측기에 대한 하드웨어 구조를 제안한다. 동영상 압축기술인 MPEG-4 AVC 부호화기의 전체 구성 중에서 핵심 부분인 인터 예측기를 1/4화소 단위로 움직임 추정을 수행 할 수 있도록 하드웨어 구조를 설계하였으며 이를 위해 블록 조각화, 움직임 추정, 움직임 보정의 기본적인 구조를 구성하고 실시간 동영상 부호화를 할 수 있도록 인터 메모리와 1/4화소 단위 고속 블록 계산기 등을 이용하였다. 구현된 전체 모듈은 Altera Excalibur 디바이스와 Xilinx Virtex2 디바이스를 이용한 FPGA 구성을 통해 검증하고 삼성 STD130 0.18um CMOS Cell Library를 이용하여 합성 및 검증을 하였다. 이렇게 검증된 구조의 성능은 ASIC으로 구현할 경우 최대 동작 주파수가 약 62.5MHz이며 성능은 QCIF크기의 영상데이터를 기준으로 초당 약 88프레임의 인터예측을 수행할 수 있다. 본 성능은 하드웨어 기반의 MPEG-4 AVC 실시간 부호화기를 설계하기에 적합한 구조임을 보여준다. In this paper, we propose an advanced hardware architecture for the fast inter prediction engine of the video coding standard MPEG-4 AVC. We describe the algorithm and derive the hardware architecture emphasizing and real time operation of the quarter_pel based motion estimation. The fast inter prediction engine is composed of block segmentation, motion estimation, motion compensation, and the fast quarter_pel calculator. The proposed architecture has been verified by ARM-interfaced emulation board using Excalibur & Virtex2 FPGA, and also by synthesis on Samsung 0.18 um CMOS technology. The synthesis result shows that the proposed hardware can operate at 62.5MHz. In this case, it can process about 88 QCIF video frames per second. The hardware is being used as a core module when implementing a complete MPEG-4 AVC video encoder chip for real-time multimedia application.

대학도시 포항의 가능성에 대한 고찰

김준우(Kim Joon-Woo),이대준(Lee Dae-Jun) 한국문화산업학회 2007 문화산업연구 Vol.7 No.2

In this paper, we are looking into a connection of the city and the university, for changing the city from industrial city to pro-environmental city that combines cultural and tourist-concept. The Bologna University, which was built about one thousand years ago, and the Heidelberg University, the university of 600 years’ tradition, have intimately associated with cities’ growth. Those universities started above tells us that traditionally, universities and cities are correlated. The advantages that universities give to cities are: first, educate men of high abilities for the need in economics, politics, industries of the society; second, possesses the techniques, which have competitive power, by doing researches and experiments that are hard for enterprises to manage; third, afforestation of the city by making open spaces that consider the utilities and the plans of city spaces, and by protecting the nature; fourth, improves the standards and makes a unification of communities, by reeducating the citizens. With the gift of beautiful natural setting, since 1970s, Pohang had successful industrial images due to international steel industry. Even with Pohang's successful industrial images, the standards of citizens’lives are not getting better. This fact also affects outflow of citizens in Pohang. At the end of 20th century, international campaign of nature-Local Agenda 21- got spread, the importance of nature became influential. As people realize the devastation of nature are equal to the loss of the useful spaces, it threatened dignity of human lives. So suggestion of making Pohang to a Campus City is to recover Pohang’s true character and leap to the fascinated competitive city in 21st century. And making Pohang to a campus city also makes citizens to participate voluntarily by reeducating them and giving them a motive. This suggestion is for unity of the universities, citizens and the cities. In this paper, we are looking into a connection of the city and the university, for changing the city from industrial city to pro-environmental city that combines cultural and tourist-concept. The Bologna University, which was built about one thousand years ago, and the Heidelberg University, the university of 600 years’ tradition, have intimately associated with cities’ growth. Those universities started above tells us that traditionally, universities and cities are correlated. The advantages that universities give to cities are: first, educate men of high abilities for the need in economics, politics, industries of the society; second, possesses the techniques, which have competitive power, by doing researches and experiments that are hard for enterprises to manage; third, afforestation of the city by making open spaces that consider the utilities and the plans of city spaces, and by protecting the nature; fourth, improves the standards and makes a unification of communities, by reeducating the citizens. With the gift of beautiful natural setting, since 1970s, Pohang had successful industrial images due to international steel industry. Even with Pohang's successful industrial images, the standards of citizens’lives are not getting better. This fact also affects outflow of citizens in Pohang. At the end of 20th century, international campaign of nature-Local Agenda 21- got spread, the importance of nature became influential. As people realize the devastation of nature are equal to the loss of the useful spaces, it threatened dignity of human lives. So suggestion of making Pohang to a Campus City is to recover Pohang’s true character and leap to the fascinated competitive city in 21st century. And making Pohang to a campus city also makes citizens to participate voluntarily by reeducating them and giving them a motive. This suggestion is for unity of the universities, citizens and the cities.

14세 여아에서 발견된 선천성 낭종성 선종성 기형

이명인 ( Myung In Lee ),손소희 ( So Hee Sohn ),이대준 ( Dae Joon Lee ),하동열 ( Dong Yul Ha ),지영구 ( Young Koo Jee ),이계영 ( Kye Young Lee ),김건열 ( Keun Youl Kim ),최영희 ( Young Hi Choi ),조정희 ( Jeong Hi Cho ),서필원 ( Pil 대한결핵 및 호흡기학회 1996 Tuberculosis and Respiratory Diseases Vol.43 No.5

반도체 배기 공정에서 복합 처리 방식으로 인한 폭발 사고 예방대책에 관한 연구

최세욱(Se Wook Choi),이대준(Dae Joon Lee),김상령(Sang Ryung Kim),김상길(Sang Gil Kim),정정희(Jeong Hee Jeong),양원백(Won Baek Yang) 한국가스학회 2022 한국가스학회지 Vol.26 No.5

반도체 공장은 인구가 밀집된 지역에 위치하여 제조 공정에서 취급되는 위험물질의 안전한 처리가 무엇보다 중요하다. 특히나 반도체 제조 공정에서 취급 후 배출되는 위험물의 종류는 매우 다양하며 물질별로 연소, 흡수, 흡착방식 등 처리 방법도 매우 복잡하다. 따라서 최근 반도체 배기 처리 공정에서는 하나의 처리 설비에 두 개 이상의 처리 방식을 적용하고 있는데, 이러한 복합 처리방식 적용으로 예상치 못한 사고가 발생하고 있다. 본 연구에서는 최근의 사고 사례인 Scrubber 방식과 전기 집진방식을 함께 적용한 처리 설비의 사고 원인을 파악하고 예방대책을 제시하여 복합 처리방식 적용 시 유의해야 할 점을 알아보고자 한다. Since semiconductor factories are located in densely populated areas, safe handling of hazardous materials handled in the manufacturing process is of utmost importance. In particular, the types of hazardous substances discharged after handling in the semiconductor manufacturing process are very diverse, and the treatment methods such as combustion, absorption and adsorption methods for each material are very complicated. Therefore, in recent semiconductor exhaust treatment processes, two or more treatment methods are applied to one treatment facility, and unexpected accidents occur due to the application of such a complex treatment method. In this study, the cause of accidents in treatment facilities that applied both the scrubber method and the electrostatic precipitation method, which are recent accident cases, are identified, and preventive measures are suggested to find out the points to be noted when applying the complex treatment method.

제약회사 여과 공정중 스플래쉬 필링에 의한 화재사고 예방대책에 관한 연구

김상길(Sang Gil Kim),이대준(Dae Joon Lee),양승복(Seung Bok Yang),임종국(Jong Guk Rhim) 한국가스학회 2021 한국가스학회지 Vol.25 No.6

제약회사에서 제조하는 의약품의 원재료에 인화성물질이 종종 존재한다. 이런 경우 과량의 인화성 물질을 투입하여 중간체를 만들고 반응에 참여하지 않은 인화성물질을 여과 및 건조단계를 통하여 제거하는 공정을 거치게 된다. 또한, 여과 공정에서 분리된 인화성 액체가 여액받이 통에 스플래쉬 필링 형태로 쌓이게 된다. 이런 경우 인화성 액체의 증기 및 미스트가 생성되어 폭발 하한 값, 최소점화에너지가 더욱 낮아지게 되며 복합 대전이 발생하여 화재⋅폭발의 위험이 증대된다. 본 연구에서는 최근의 제약회사 여과공정 중 발생한 화재 사고를 분석하여, 화재 폭발 사고를 방지하기 위한 방안으로 질소 공급설비 설치, 용량 개선, 도전성 여과포 및 정전기 축적 방지대책 등을 제시하고자 한다. Flammable substances are often present in the raw materials of pharmaceutical products manufactured by pharmaceutical companies. In this case, an excessive amount of flammable substances is added to make an intermediate, and flammable substances that do not participate in the reaction are removed through filtration and drying steps. In addition, the flammable liquid separated in the filtration process is accumulated in the form of splash filling in the filtrate container. In this case, vapor and mist of flammable liquid are generated, which lowers the lower limit of explosion and minimum ignition energy, and increases the risk of fire and explosion due to complex charging. In this study, by analyzing fire accidents that occurred during the recent filtration process of pharmaceutical companies, it is proposed to prevent static electricity accumulation by measures of nitrogen supply facilities, capacity improvement, conductive filter fabric and so on.

Web3.0 기반 쇼핑몰 개발

최효현(Hyo Hyun Choi),이병선(Byeong Seon Lee),이대준(Dae Joon Lee),김동건(Dong Geon Kim),김봉준(Bong Joon Kim) 한국컴퓨터정보학회 2024 한국컴퓨터정보학회 학술발표논문집 Vol.32 No.1