FIELD: converting code of received video sequence using extrapolated movement data received from video sequence.
SUBSTANCE: proposed method for code conversion involves reception of first bit stream of compressed picture data having some coding parameters. These parameters may relate to GF-structure of picture frames, picture frame size, to parameter showing if frames presented in input bit stream are picture fields or frames, and/or if they form picture frames presented in bit stream, direct or interlaced sequence. First and second movement vectors are obtained from input bit stream and used together with weighting coefficients to extrapolate third movement vector for output bit stream of compressed picture data. Output bit stream that differs from input one by one or more parameters is outputted as converted-code output signal.
EFFECT: provision for minimizing of or dispensing with movement estimation in code conversion process.
22 cl, 4 dwg, 1 tbl
