摘要
H.264/AVC以巨大编码复杂度为代价,在获得更高压缩率的同时,编码实时性也随之降低。针对视频编码中重要且耗时的帧间预测技术,分析了宏块平坦度和时空相关性,提出了一种快速的预测模式选择算法。仿真实验结果表明,本文提出算法与H.264/AVC(JM12.2)标准算法相比,在保持重建视频图像质量和输出码流结构的前提下,平均节省约70%的编码时间,并继承了H.264/AVC低码率的编码优势。
At the cost of increased computational complexity, as H.264/AVC obtains higher compression ratio, its encoding real-time performance also fall subsequently. Aiming at the important and time-consuming inter-frame prediction technique in video encoding, flatness characteristics and spatio-temporal correlation of macro-block are analyzed. A fast inter-frame prediction mode decision algorithm is proposed Simulation results show that the proposed algorithm can reduce about 70% on average of the total encoding time compared with H.264/AVC (JM12.2), with keeping video image quality and reconstruction output streaming structure, inheriting low bit-rate coding advantage.
出处
《电路与系统学报》
CSCD
北大核心
2012年第4期46-52,共7页
Journal of Circuits and Systems
基金
国家科技重大专项子课题(2009ZX07212-003-02)
国家自然科学基金面上项目(30970780)
国家自然科学基金-青年基金项目(61100131)