多视点视频是未来视频技术的重要发展方向,而码率控制是影响多视点视频传输质量的重要因素。基于多视点视频编码统计特性,提出了一种面向多视点视频编码的比特分配与码率控制算法。该比特分配算法分为三层:GGOP层、GOP层和帧层,其中重点研究了GOP层比特分配,即视点间的比特分配策略,利用拉格朗日乘子法,提出了一种基于视点质量一致性优化的视点间比特分配模型。实验结果表明,与固定量化参数的控制策略相比,本算法能在精确控制输出码率的前提下,使得各视点视频质量更加均匀。
Multi-view video is a very important developing direction in video technologies in future,and rate control is one of the key factors influencing the multi-view video transmission quality.Based on the statistical features of the multi-view video coding,an efficient rate control algorithm for multi-view video coding is proposed.The rate control algorithm contains three layers: GGOP layer,GOP layer and frame layer.The bit allocation strategy based on Lagrange optimum algorithm among views is emphasized and a bit allocation model for consistent view quality is proposed.Compared with the fixed QP control strategy,the experiment results show that the proposed algorithm can efficiently control the bit rate and obtain more consistent views.