Method and circuit arrangement for reducing noise in digitised television signals

A noise reduction of digitised television signals should become effective even with movements in the image content and not perceptibly impair the image sharpness. An estimated-value signal for the noise component is calculated (6) from the difference (3) of a frame-to-frame comparison (1, 5) and the difference (4) between the noisy input signal (1) and the calculated estimated-value signal (6) is formed which supplies the reduced-noise output signal (2) which is stored for subsequent calculations (5).