Patent ID: 6983013

Claim:
A method for encoding video signals corresponding to a sequence of frames each of which originally consists of two fields F 1 and F 2 , in which the encoding step is preceded by a preprocessing step which itself comprises the sub-steps of: (A) receiving the successive frames and delaying each of them with a delay of at least two fields; (B) adjusting said delay according to the following dominance change criterion: (a) when a change from an F 1 dominance to an F 2 dominance is detected, the first field of the first F 2 dominant frame is suppressed, said delay being therefore decreased by a quantity equal to “one field” duration; (b) when a change from an F 2 dominance to an F 1 dominance is detected, the last field of the last F 2 dominant frame is repeated, the delay being therefore increased by a quantity equal to “one field” duration.