Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2005.11a
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- Pages.561-564
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- 2005
DPCM-Based Image Pre-Analyzer and Quantization Method for Controlling the JPEG File Size
JPEG 파일 크기를 제어하기 위한 DPCM 기반의 영상 사전 분석기와 양자화 방법
- Shin, Sun-Young (Department of Electronic Engineering, Sungkyunkwan University) ;
- Go, Hyuk-Jin ;
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Park, Hyun-Sang
;
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Jeon, Byeung-Woo
(Department of Electronic Engineering, Sungkyunkwan University)
- 신선영 (성균관대학교 전자공학과) ;
- 고혁진 (삼성전자 SYS.LSI 사업부, Mobile 개발실, Image 팀) ;
-
박현상
(공주대학교 전기전자공학부)
;
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전병우
(성균관대학교 전자공학과)
- Published : 2005.11.26
Abstract
In this paper, we present a new JPEG (Joint Photograph Experts Group) compression architecture which compresses still image into fixed size of bitstream to use restricted system memory efficiently. The size of bitstream is determined by the complexity of image and the quantization table. But the quantization table is set in advance the complexity of image is the essential factor. Therefore the size of bitstream for high complexity image is large and the size for low complexity image is small. This means that the management of restricted system memory is difficult. The proposed JPEG encoder estimates the size of bitstream using the correlation between consecutive frames and selects the quantization table suited to the complexity of image. This makes efficient use of system memory.
Keywords