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A Novel Joint Rate Distortion Optimization Scheme for Intra Prediction Coding in H.264/AVC
Qingbo WU Jian XIONG Bing LUO Chao HUANG Linfeng XU
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/04/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
RDO, video coding, H.264/AVC,
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In this paper, we propose a novel joint rate distortion optimization (JRDO) model for intra prediction coding. The spatial prediction dependency is exploited by modeling the distortion propagation with a linear fitting function. A novel JRDO based Lagrange multiplier (LM) is derived from this model. To adapt to different blocks' distortion propagation characteristics, we also introduce a generalized multiple Lagrange multiplier (MLM) framework where some candidate LMs are used in the RDO process. Experiment results show that our proposed JRDO-MLM scheme is superior to the H.264/AVC encoder.