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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (6): 778-785    DOI: 10.1631/jzus.A0820632
Electrical & Electronic Engineering     
Local curve fitting based Lagrange multiplier selection for Id-slice in multi-view video coding
Shi-fang XU, Guo-bin CHEN, Hua-dong PAN, Ji-lin LIU
Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  The rate and distortion of Id-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.

Key words： Id-slice      Lagrange multiplier      Local curve fitting      Multi-view video coding (MVC)     
Received: 30 August 2008     
CLC:  TP391  
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Shi-fang XU
Guo-bin CHEN
Hua-dong PAN
Ji-lin LIU
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Shi-fang XU, Guo-bin CHEN, Hua-dong PAN, Ji-lin LIU. Local curve fitting based Lagrange multiplier selection for Id-slice in multi-view video coding. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(6): 778-785.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820632     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I6/778

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