Parameter study of image recovery based on MPEG-4

Hui Mei Li; Cai Cheng Shi; Pei Kun He; Jun Zhu

Parameter study of image recovery based on MPEG-4

Hui Mei Li^*, Cai Cheng Shi, Pei Kun He, Jun Zhu

^*Corresponding author for this work

School of Medical and Technology

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

MPEG-4 has been the most popular image compression standard. The process of I frame, P frame and B frames' coding based on MPEG-4 standard was presented. Some factors that affect the compressed quality were described, DCT transform, quantity parameter, searching range and half-pixel searching in the motion estimation. Many experiment data including compression ratio, PSNR and codec time etc were compared for the influence of these parameters, in which QP is the most significant parameter and the others have certain effect.

Original language	English
Pages (from-to)	449-451+454
Journal	Guangxue Jishu/Optical Technique
Volume	32
Issue number	3
Publication status	Published - May 2006

Keywords

DCT transform
Half-pixel searching
MPEG-4
Motion estimation
QP

Cite this

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N2 - MPEG-4 has been the most popular image compression standard. The process of I frame, P frame and B frames' coding based on MPEG-4 standard was presented. Some factors that affect the compressed quality were described, DCT transform, quantity parameter, searching range and half-pixel searching in the motion estimation. Many experiment data including compression ratio, PSNR and codec time etc were compared for the influence of these parameters, in which QP is the most significant parameter and the others have certain effect.

AB - MPEG-4 has been the most popular image compression standard. The process of I frame, P frame and B frames' coding based on MPEG-4 standard was presented. Some factors that affect the compressed quality were described, DCT transform, quantity parameter, searching range and half-pixel searching in the motion estimation. Many experiment data including compression ratio, PSNR and codec time etc were compared for the influence of these parameters, in which QP is the most significant parameter and the others have certain effect.

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KW - Half-pixel searching

KW - MPEG-4

KW - Motion estimation

KW - QP

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JF - Guangxue Jishu/Optical Technique

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Parameter study of image recovery based on MPEG-4

Abstract

Keywords

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