DEVICE AND METHOD FOR CODING VIDEO PICTURES

摘要

The picture quality of an MPEG-encoded video signal is improved considerably by reducing the coefficients after quantization in such a way that the "Lagrangian cost" D+ lambda R (D is distortion, R is bitrate) is minimal for a given value of the "Lagrange multiplier" lambda . The distortion decreases because the step size is reduced while the bitrate remains equal.