基于ρ域线性率失真模型的H．264帧级码率控制算法  

A frame-level H.264 rate control algorithm based on p-domain linear R-D model

作　　者：陈庆德[1] 胡栋[1] 

机构地区：[1]南京邮电大学江苏省图像处理与图像通信重点实验室,南京210003

出　　处：《信号处理》2009年第2期251-255,共5页Journal of Signal Processing

基　　金：国家自然基金重点项目的支持(项目编号:60432040)。

摘　　要：本文基于ρ域线性率失真模型提出一种适用于H.264的帧级码率控制算法。先验证线性率失真函数对H.264编码算法的适用性,再通过使用混合自适应估计方法精确地估计出该模型惟一的参数θ,实现线性率失真函数在H.264码率控制中的应用。仿真结果表明,与JVT-H017算法相比,新算法不仅获得更精确的码率控制,而且获得更平稳的输出码率和PSNR,同时实现简单,适用于实时视频通信。Based on ρ-domain linear R-D model, a frame-level rate control algorithm for H. 264 is proposed in this paper. The R- D model is verified using H. 264 video coding algorithm at first. Then the hybrid adaptive estimation method is applied to estimate the principle parameter of this model θ. Simulation results show that, compared with JVT-H017, the new algorithm not only achieves more accurate rate control, but also obtains more stable output bit rate and PSNR. In addition, the new algorithm is simple in implementation, and therefore, suitable for the application of real-time video communication.

关 键 词：视频通信 码率控制 H.264 率失真模型 

分 类 号：TN919.8[电子电信—通信与信息系统]