• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.608-611
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• 2008

정보화 사회가 진행되어감에 따라 카메라 센서, 디지털 카메라, 휴대폰, 영상 관련디지털 기기들이 증가하고 이로 인하여 영상정보 서비스 기술의 중요성이 크게 부각되었다. 특히 멀티미디어 응용서비스 기술에서는 영상 정보가 필수적인데, 그 영상 정보의 양이 너무 방대하여 압축 부호화를 하여 사용되고 있다. 본 논문에서는 정지영상압축 방법 중 JPEG표준에서 제시한 4가지 동작 모드 중 베이스라인을 기반으로 하는 JPEG 알고리즘을 연구하여 Motion JPEG에서 동작 가능한 디코더를 C언어를 통해 시뮬레이션하고 최적화된 결과를 VHDL로 구현하였다. Motion JPEG의 무선전송 환경에 적용 가능한 불규칙한 스트리밍 방식의 입력데이터의 처리가 가능한 파이프라인 구조로 설계하였다. 설계결과 Xilinx XC3S1000 FG676-4 환경에서 66.130MHz의 동작속도를 나타내었고 최초 223클록의 딜레이 이후 매 클록마다 화소데이터를 얻을 수 있었다 Motion JPEG 디코더를 설계하는데 사용된 게이트는 총 54,143개이다.

• Journal of Internet Computing and Services
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• v.12 no.4
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• pp.45-50
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• 2011

In this paper, the encoding time delay of FH/TDD(Frequency Hopping/Time Division Duplex) based Motion JPEG image compression CODEC is analyzed for radio video transmissions of multi-camera systems in a vehicle. And, Synchronized connection of minimum channel collision is designed with synchronized shift and access according to channel status for Motion JPEG based FH/TDD multiple access.

• Proceedings of the IEEK Conference
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• 2003.07d
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• pp.1653-1656
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• 2003

In this paper, we implemented a web-based communication system using Motion JPEG and RTP. MJPEG compression method is used for compression of the image in order to film and transmit the moving image information in the real time, and the RTP(Real-Time Transport Protocol) which differs from the existing TCP and UDP is used for the data transmission.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.89-92
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• 2008

정보화 사회가 진행되어감에 따라 카메라 센서, 디지털 카메라, 휴대폰, 영상 관련디지털 기기들이 증가하고 이로 인하여 영상정보 서비스 기술의 중요성이 크게 부각되었다. 특히 멀티미디어 응용서비스 기술에서는 영상 정보가 필수적인데, 그 영상 정보의 양이 너무 방대하여 압축 부호화를 하여 사용되고 있다. 본 논문에서는 정지영상압축 방법 중 JPEG표준에서 제시한 4가지 동작 모드 중 베이스라인을 기반으로 하는 JPEG 알고리즘을 연구하여 허프만코팅 기반의 엔트로피 디코더의 불규칙적인 데이터 입출력타이밍의 효과적인 제어를 통해 Motion JPEG에서 동작 가능한 디코더를 C언어를 통해 시뮬레이션하고 최적화된 결과를 VHDL로 구현하였다.

• Journal of Korea Multimedia Society
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• v.12 no.12
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• pp.1701-1709
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• 2009

The mobile terminal system plays a key role in medical industries which require in fast and accurate diagnosis from heterogeneous acquisition equipment. The demand for PACS (picture archiving and communication systems) has continued to increase in major hospitals and private clinics. Patient care depends on how fast the medical imaging system provides images and how accurately the images are interpreted by physicians. In this paper, we propose an efficient method to decipher the hundreds of images required by physicians to accurately diagnose patients. By exploring Motion- JPEG (M-JPEG), this paper has demonstrates the possibilities for efficient management of medical images with a newly designed image file format and improvement in imaging diagnoses through the replaying of moving pictures of a patient in a mobile environment.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.3C
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• pp.297-305
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• 2007

In the paper, a Motion JPEG2000 coder which has been set as the standard for image compression by the Digital Cinema Initiatives (DCI), an organization composed of major movie studios was implemented into a target FPGA. The DWT (Discrete Wavelet Transform) based on lifting and the Tier 1 of EBCOT (Embedded Block Coding with Optimized Truncation) which are major functional modules of the JPEG2000 were setup with dedicated hardware. The Tier 2 process was implemented in software. For digital cinema the tile-size was set to support $1024\times1024$ pixels. To ensure the real-time operations, three entropy encoders were used. When Verilog-HDL was used for hardware, resources of 32,470 LEs in Altera's Stratix EP1S80 were used, and the hardware worked stably at the frequency of 150Mhz.

• Journal of Broadcast Engineering
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• v.14 no.1
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• pp.93-98
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• 2009

While the Motion JPEG2000 has been considered as a unique encoder for digital cinema due to its high quality coding and large screen format, the realization of a digital cinema system and its service cost enormous fund and time. In this paper a digital cinema transmission system with PC and RTP protocol over the Internet is proposed, and showed how tiles of moving images are transmitted, decoded independently and combined to reconstruct and display at a large screen for digital cinema service. The simulation has been carried out for tiles of 128${\times}$128, 256${\times}$256, 512${\times}$512, and 1024${\times}$1024 pixels. In the experiment, two clients of PC’s received and decoded tiles of video and constructed whole size of moving images successfully. The PSNR’s of the video ranges 30dB to 40dB at compression rate of 160:1 and 30dB to 50dB at and below 16:1, respectively. The result showed a possibility for the reconstruction of video in multi-vision.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.39 no.2
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• pp.7-13
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• 2002

When a USB digital camera is used for PC video-conference applications, motion picture data need to be transferred to the PC through the USB port. Due to the mismatch between the data rates of the USB and the motion picture, data compression should be performed before the transmission from the USB. While many motion picture compression algorithms require large intermediate memory space, the JPEG algorithm does not need to store an entire frame for the compression. Instead, a relatively small buffer is required at the input of the JPEG compression engine to resolve the inconsistency between the orders of the inputted data and the consumed data. Data reordering can be easily implemented using a double buffering scheme, which still requires a considerable size of memory. In this paper, a novel memory management scheme is proposed to avoid the double buffering. The proposed memory architecture requires a small amount of memory and a simple address generation scheme, resulting in overall cost reduction.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.269-269
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.201-201
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• 2004