JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.6 P.778-785

http://doi.org/10.1631/jzus.A0820632

Local curve fitting based Lagrange multiplier selection for I_d-slice in multi-view video coding

Author(s): Shi-fang XU, Guo-bin CHEN, Hua-dong PAN, Ji-lin LIU
Affiliation(s): Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
Corresponding email(s): shifang_xu@yahoo.com.cn
Key Words: I_d-slice, Lagrange multiplier, Local curve fitting, Multi-view video coding (MVC)

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Abstract: The rate and distortion of i_d-slice do not fit the globally linear relationship on a logarithmic scale. lagrange multiplier selection methods based on the globally linear approximate relationship are neither efficient nor optimal for multi-view video coding (MVC). To improve the coding efficiency of MVC, a local curve fitting based lagrange multiplier selection method is proposed in this paper, where lagrange multipliers are selected according to the local slopes of the approximate curves. Experimental results showed that the proposed method improves the coding efficiency. Up to 2.5 dB gain was achieved at low bitrates.

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