Method of protecting a video picture sequence against fraudulent use, and devices for carrying out this method.

摘要

The invention is intended to protect the artistic property rights attached to video pictures broadcast by radiofrequency channels or in the form of video cassettes. A video cassette duplicating device for implementing a method of protection comprises a video source (1) delivering a video image sequence to a set of video recorders (6) via a picture inlaying device (2) receiving from a character generator (3) a video signal making it possible to inlay in certain pictures a mark identifying the video cassette duplicating company. This mark has small dimensions relative to the dimensions of a picture, it has a variable and random position in the marked pictures, and the interval of time between the marked pictures is chosen randomly. Application to the radiofrequency broadcasting of video pictures and to the duplicating of video cassettes <IMAGE>