An improved Exp-Golomb codes for efficient DCT coefficients coding

Author

Gao, Wei ; Li, Hua ; Liu, Kaihua

Author_Institution

Coll. of Electron. & Inf. Eng., Tianjin Univ.

fYear

2005

fDate

1-4 May 2005

Firstpage

2037

Lastpage

2040

Abstract

Exp-Golomb codes are adopted by current image and video standards to perform entropy coding. But Exp-Golomb codes are sensitive to source parameters such as quantizer step size and pdf shape parameter. Under variable source parameters, the coding efficiency of Exp-Golomb codes falls drastically, as poor as 30% and even worse. The author presents a new class of codes, hybrid Golomb codes, based on Exp-Golomb codes and Golomb-Rice codes, which integrates the properties of two classes of codes and thus are more robust than Exp-Golomb codes when source parameters change frequently. In particular when quantizer step size is changing, the coding efficiency of hybrid Golomb codes is higher 10% than that of Exp-Golomb codes

Keywords

discrete cosine transforms; entropy codes; video coding; DCT coefficients coding; Exp-Golomb codes; Golomb-Rice codes; entropy coding; hybrid Golomb codes; image standards; pdf shape parameter; quantizer step size; variable source parameters; video standards; Code standards; Degradation; Discrete cosine transforms; Educational institutions; Entropy coding; Image coding; Robustness; Shape; Video coding; Video compression;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2005. Canadian Conference on

Conference_Location

Saskatoon, Sask.

ISSN

0840-7789

Print_ISBN

0-7803-8885-2

Type

conf

DOI

10.1109/CCECE.2005.1557386

Filename

1557386