New padding algorithm for object-based coding

Author

Long, Liu ; Qijun, Song ; Zhanhui, Wang ; Haiyan, Zhou

Author_Institution

Xi´´an Univ. of Technol., Xi´´an, China

Volume

1

fYear

2011

fDate

15-17 Oct. 2011

Firstpage

556

Lastpage

559

Abstract

The boundary macroblock padding is one key technology of MPEG-4 codes. In MPEG-4, the repetitive padding algorithm does not make use of the trend of pixel value variation often near object boundaries in padding the exterior pixels of reference video object. In this paper, in order to improve performance of MPEG-4 coder, a linear padding for MPEG-4 motion estimation is proposed to reduce prediction errors and improve compression efficiency. In our test, the different video rate distortion curves verify that the proposed algorithm get the higher PSNR (0.4~2.5 dB) than the repetitive padding scheme does at different bit rate.

Keywords

data compression; motion estimation; video coding; MPEG-4 code; MPEG-4 motion estimation; boundary macroblock padding; compression efficiency; exterior pixel; linear padding; object boundaries; object-based coding; pixel value; prediction error; reference video object; repetitive padding algorithm; video rate distortion curve; Algorithm design and analysis; Equations; Motion estimation; PSNR; Prediction algorithms; Rate-distortion; Transform coding; MPEG-4; Motion estimati; Padding;

fLanguage

English

Publisher

ieee

Conference_Titel

Image and Signal Processing (CISP), 2011 4th International Congress on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-9304-3

Type

conf

DOI

10.1109/CISP.2011.6099991

Filename

6099991