METHOD FOR ASSIGNING BITS USED FOR PERFORMING QUANTIZATION AND DEVICE THEREFOR

摘要

PURPOSE: A method for assigning bits used for performing quantization is provided to linearly approximate the number of assigned bits for quantization, in order to effectively carry out the quantization, thereby maintaining high accuracy even though a scene change is generated. CONSTITUTION: A system receives DCT coefficients for one macro block of one inputted image frame(S410). The system counts the number of '0' among the DCT coefficients within the inputted macro block, and calculates the ratio of the counted number of '0'(S420). The system decides whether the ratio of the counted number of '0' is calculated for all macro blocks of the one image frame(S430). If some macro blocks to be inputted remain, the system receives a next macro block, and receives all the macro blocks. If the calculation of the ratio of the counted number of '0' is completed, the system assigns predetermined bits by linearizing with the use of the calculated ratio of the counted number of '0' (S440).