FIELD: television; systems for smoothing or stretching interfaces between picture areas. SUBSTANCE: device has pre-filter 1, first comb filter 2 incorporating first frame delay unit 3 and first subtractor 4, error corrector 5 incorporating second comb filter 6 built up of second frame delay unit 7 and second subtractor 8, and error-eliminating logic unit 9 incorporating absolute-value calculator 10, first threshold detector 11, first stretcher 12, and controlled switch 13, module evaluating unit 14, second threshold detector 15, and second stretcher 16. EFFECT: improved design. 6 cl, 1 dwg
