Visual saliency guided mode decision in video compression based on Laplace distribution of DCT coefficients

Author

Wulf, Steffen ; Zolzer, Udo

Author_Institution

Dept. of Signal Process. & Commun., Helmut Schmidt Univ., Hamburg, Germany

fYear

2014

Firstpage

490

Lastpage

493

Abstract

A visual saliency based approach for macroblock (MB) mode selection in video compression is presented. It is based on the Laplace distribution of transformed residuals. Visual saliency of a MB is used to make the encoder vote for a mode which requires less bits in a region which is visually less important. It shows a gain of up to 0.6 dB in terms of PSNR compared to conventional rate-distortion optimization (RDO) procedure in H.264/AVC. Moreover, it suggests to be a competitive alternative to a well-established perceptually based video coding method. At the same time it has no negative impact on the PSNR.

Keywords

Laplace transforms; block codes; data compression; discrete cosine transforms; optimisation; video coding; AVC; DCT coefficient Laplace distribution; H.264 standard; PSNR; RDO procedure; discrete cosine transform; encoder vote; macroblock mode selection; rate-distortion optimization procedure; video compression; visual saliency guided MB mode decision; Discrete cosine transforms; Encoding; PSNR; Quantization (signal); Standards; Video coding; Visualization; Bit Allocation; Compression; Laplace Distribution; Rate-Distortion Optimization (RDO); Visual Saliency;

fLanguage

English

Publisher

ieee

Conference_Titel

Visual Communications and Image Processing Conference, 2014 IEEE

Type

conf

DOI

10.1109/VCIP.2014.7051613

Filename

7051613