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

作　　者：Shi-fang XU Guo-bin CHEN Hua-dong PAN Ji-lin LIU 

机构地区：[1]Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 31002 7, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2009年第6期778-785,共8页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (Nos. 60505017 and 60534070) supported by the National Natural Science Foundation of China

摘　　要：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. Experi-mental results showed that the proposed method improves the coding efficiency. Up to 2.5 dB gain was achieved at low bitrates.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.

关 键 词：Id-slice Lagrange multiplier Local curve fitting Multi-view video coding （MVC） 

分 类 号：TN919.81[电子电信—通信与信息系统] TB11[电子电信—信息与通信工程]