Abstract: A device for deriving a synchronizing signal comprises a synchronizing signal detector (1) having an output (3) is coupled both directly and via a delay unit (18) to inputs (4 and 19, respectively) of a signal combination unit (5). The output (6) thereof is coupled to an input (7) of a flywheel counter (8). One output (9) of the flywheel counter supplies the synchronizing signal. Another output is coupled to an input (11) of the signal combination unit. The first input (4) and the second input (11) of the combination unit are coupled to inputs of a time slot circuit (12). The first input (4) and the third input (19) of the combination unit are coupled to inputs (20, 21) of a further combination unit (14). The output of the time slot circuit is also coupled to an input (13) of the further combination unit (14). The delay time (T) of the delay unit (18) is equal to n times the period of the synchronizing signal.

Abstract: A digital magnetic tape video recorder with dropout compensation; to prevent delays in the demodulation of the digital video signal after a dropout has ended, owing to the fact that the channel clock is free-running, signal insertion during such a dropout is continued after that dropout has ended up to the next synchronizing word for dropouts having a duration exceeding a predetermined length of time.