Based on the characteristics of quality scalable video coding, a fast inter encoding algorithm was proposed on the enhancement layer for the medium-grain quality scalability (MGS). Firstly, based on the base layer macroblock mode and rate-distortion, the order of the coding mode for the current macro block was proposed. Then based on the encode structure, the correlation between layers, and the spatial correlation, desicions for the Direct coding mode, layer mode,and adjacent mode were proposed, respectively. Finally, the macrobiocks were encoded in the order predicted, with the proposed three decisions to improve on the coding speed by early termination. The experimental results show that the computational complexity of the algorithm is reduced by 68％ on the average compared to that of the standard method,with only negligible coding loss and bit-rate increase.%根据质量可伸缩编码的特征,提出一种适合于中粒度质量可伸缩视频编码增强层的帧间快速编码算法.首先根据基本层宏块的模式和率失真值预测当前宏块编码模式采用的顺序;然后根据编码结构提出Direct编码方式判断,根据层间相关性提出了层间方式判断,利用空间相关性提出了相邻方式判断,最后根据已预测的模式顺序编码当前宏块,并利用这3种判断提前终止以提高编码速度.实验结果证明,与标准算法相比,所提算法的计算复杂度平均降低了68%,同时对编码质量和比特率几乎没有影响.
展开▼
