Adaptive weighted prediction in video coding

Author

Shen, Yanfei ; Zhang, Dongming ; Huang, Chao ; Li, Jintao

Author_Institution

Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing, China

Volume

1

fYear

2004

fDate

30-30 June 2004

Firstpage

427

Abstract

An adaptive weighted prediction algorithm is proposed to improve the coding efficiency for video scenes that contain global brightness variations caused by fade in/out or local brightness variations caused by camera flashes. A two brightness-variation parameters model is used, which represent multiplier and offset components of the brightness variation. Brightness variations at frame and macroblock level, respectively, are detected; if there are brightness variations, we use weighted prediction to compensate these brightness variations; otherwise the conventional prediction method is used. Simulation results show that the proposed algorithm can improve the coding efficiency sufficiently when the coded scenes contain brightness variations. This technology is adopted by AVS.

Keywords

brightness; prediction theory; video coding; Audio Video Coding Standard of China; adaptive weighted prediction algorithm; brightness-variation parameters; camera flashes; coding efficiency; fade in; fade out; frame level; macroblock level; multiplier components; offset components; video coding; Brightness; Cameras; Chaos; Computers; Histograms; Layout; Motion estimation; Prediction algorithms; Prediction methods; Video coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Expo, 2004. ICME '04. 2004 IEEE International Conference on

Conference_Location

Taipei

Print_ISBN

0-7803-8603-5

Type

conf

DOI

10.1109/ICME.2004.1394220

Filename

1394220