Rate distortion model based on dual parameters Weibull distribution
基于双参数Weibull分布的视频编码率失真模型的研究

According to analysis of discrete cosine transform (DCT) coefficients of video sequence,a new DCT coefficients statistical model based on Weibull probability density function(PDF) is introduced. Compared with Laplacian PDF and Cauchy PDF,the model can describe properties of DCT of video sequences much better. In addition,according to the new statistical model and theory of entropy coding,the rate quantization (RQ) and distortion quantization (DQ) functions are proposed separately. Based on the simplified an...