H.264/AVC快速帧间编码算法

基于率失真优化的H.264/AVC帧间宏块编码模式,需要对10种模式进行率失真优化计算才能得到一个宏块的最优编码模式,这种宏块的最优编码模式是以巨大计算复杂度为代价的.为了降低计算复杂度,在实验统计了各种宏块编码模式在不同QCIF视频序列中所占的比例及分析各种编码模式的适用性情况下,提出了一种快速帧间编码算法,它采用优先判断SKIP模式和图像纹理相结合的方法,在基于H.264/AVC测试模型JM7.6上的仿真试验表明,所提出的快速算法,在基本保持图像质量和码率基本不变的情况下,可以有效提高编码速度.

Fast Intermode Coding Algorithm for H.264/AVC

In H.264/AVC,when using rate-distortion optimization to get a best coding type for a macroblock,the encoder has to compute rate-distortion cost of 10 coding types.This costs a extremely computational complexity.To reduce computation complexity,a fast intermode coding algorithm was proposed by analyzing the statistics of inter-macroblock coding types ratio and their applicability in different QCIF video sequence.It considerates both SKIP mode and the texture of picture.The fast algorithm has been realized based on the testing mode JM7.6 for H.264/AVC.It can efficiently save coding time while maintaining similar picture quality and compression ratio.