Practical Rate-Distortion Estimation of MPEG-2 Video for Real-Time Processing
Sung‐Hoon Hong, Seong Dae Kim · Journal of Electrical Engineering and Information Science · 1999
In this paper, we propose a rate-distortion estimation method for MPEG-2 video, which enables us to predict the number of bits and the distortion to be generated from an encoded picture at a given quantization step size, and vice versa. The proposed estimation method has some outstanding advantages. First, the computational complexity is small because its major operation is just to obtain a histogram or weighted histogram of the DCT coefficients from an input picture, and the final form of the proposed estimation model is simple. Second, its results are very accurate enough to be applied to practical video coding applications. Simulation results show that the estimation errors for the rate and for the distortion do not exceed 2.5% and 1%, respectively.