作　　者： ; ;

机构地区： 广东纺织职业技术学院

出　　处： 《计算机工程》 2009年第13期222-224,共3页

摘　　要： 在分析率失真理论的基础上,提出帧内编码宏块模式、帧间编码宏块模型的新思想,并建立均方差失真计算模型。该方法能够全局最优地求得在误码环境下,率失真曲线上的最佳控制点,不仅能够在给定的网络带宽下自适应地调整量化参数,而且可以根据当前网络丢包概率进行帧内宏块刷新,起到较好地抵抗信道误码的效果,对于无线环境中的视频鲁棒编码传输及资源分配,具有较好的参考价值。 On the base of the theory of rate distortion, the new idea of macro block mode about inner and mutual compiling frame is presented in this paper, and the MSE distortion computation model is built. This method can acquire the optimal control point in the rate-distortion curve under the code error environment from the global optimization perspective, not only self-adaptive adjust the quantization parameter under given network bandwidth but also refresh inner macro block frame according to the current probability of loss of network package, and plays an important effect in counteracting the channel code error, which has a good reference value in the way of transmitting robust video code in wireless environment and allocating resource.

关 键 词： 率失真函数 信源编码 帧内预测误码扩散 帧间误码扩散系数

领　　域： [自动化与计算机技术] [自动化与计算机技术]