METHOD AND DEVICE FOR CONTROLLING CODING SPEED AND DATA MEDIUM STORING PROGRAMME TO THIS END

摘要

FIELD: information technology. ^ SUBSTANCE: number of codes formed for quantised information and number of codes formed for non-quantised information for a coded image are measured; the ratio of the number of codes formed for the non-quantised information to the total number of codes formed is calculated based on said measured number of codes; and the target number of codes in the entire coding image is determined using the calculated ratio of the number of codes formed for the non-quantised information. The target number of codes may be determined by calculating a complex index for the quantised information of the image which was coded, and estimation of the number of codes formed when the target coding image is coded, using a preset quantisation step based on said index and the ratio of the number of codes formed for the non-quantised information. ^ EFFECT: reliable control of bit rate when coding. ^ 9 cl, 7 dwg