基于可伸缩视频编码的率失真优化编码算法
首发时间:2009-02-09
摘要:本文提出一种基于SVC的率失真优化编码算法,该算法在分析了差错信道下传输可伸缩视频流的编码失真和误差扩散失真基础上,在率失真优化模型中引入时间和信噪比分级的误差分级参数,并根据信道状态自适应地确定宏块编码模式。仿真结果表明,该算法可提高误码条件下的视频流鲁棒性,适合于视频数据在差错信道上的传输。
关键词: 可伸缩视频编码(SVC) 率失真模型 模式选择 误码扩散
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An adaptive RD-optimal coding algorithm for scalable video coding
Abstract:In this paper, we addressed a novel rate-distortion optimized (RDO) coding algorithm for SVC. After source-coding distortion and error propagated distortion values had been estimated and stored for each frame, a parameter used for indicating error propagation of temporal and SNR layers was added into the RDO model. Based on these encoding parameters, an optimal macroblock mode decision scheme was carried out. Simulation results show that the proposed scheme is robust to pack loss and suitable for video transmission over error channels.
Keywords: scalable video coding rate-distortion model mode selection algorithm error propagation
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