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Context-Adaptive Mode Decision Algorithm for Scalable Video Coding with Quality Scalability
Author(s): 
Pages: 95-99
Year: Issue:  S1
Journal: Journal of Beijing University of Posts and Telecommunications

Keyword:  H.264 可分级视频编码扩展 层间预测 模式选择;
Abstract: 为减轻质量域可分级视频编码的计算复杂度,提出了一种快速模式选择算法.该算法将模式选择流程分为3个阶段:首先检测运算复杂度低、出现概率大的跳过类模式集合;依据层间相关性和空域相关性选择性检测候选编码模式集合;最后遍历检测剩余编码模式.若第1或第2阶段所获得的最小码率-失真代价值小于预先定义的门限,则提前结束模式选择流程.仿真结果证明,与全遍历算法相比,新算法可以获得45.9%~80.8%的编码速度提升;峰值信噪比降低最多为0.15 dB,码率增加最多为0.62%.
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