FIELD: computer engineering; active-video computer systems. SUBSTANCE: method includes division of video frame into X and Y locations. Visual object locations are assigned their respective numbers and remaining locations are assigned zero. Video frame coding for generating card data array is effected by separating series of visual object locations. Modifiers are entered in card data array. Interframe coding is made for preceding and next video frame. Data array A of interframe coding and array B of difference matrix of preceding and next video frame encoded by interframe coding are obtained. If position of visual object locations and its geometry change, size in bytes of data array A is compared with data array B using formula W = | [P(A) P(B)]/P(A)| x 100%. If W > K, where K is desired threshold value, array B is saved as description of next card. If W <K, array A is saved as description of next card. In this way set of cards holding data arrays of coded coordinates is obtained. EFFECT: enhanced capacity and coding speed; reduced saved data arrays. 3 cl, 12 dwg, 1 tbl
