BIT-RATE CONTROL METHOD FOR A MACRO-BLOCK

摘要

PURPOSE: A bit rate controlling method for a block of a video encoding device is provided to determine an control amount of bit ratio for a block mode except for an I block in P and B frames. CONSTITUTION: A video encoding device predicts a motion vector of 16x16 block(404). The video encoding device calculates the average and dispersion of 16x16 block in a motion vector prediction result(406). The video encoding device calculates a bit generation prediction value(410,412). The video encoding device calculates the intensity of bit generation quantity(414). The video encoding device calculates a quantization coefficient control value(416). The video encoding device controls bit rate about an image.