| 主权项 |
1. A method to mark a media content sequence in a digital data stream received by a receiver device, the receiver device comprising at least one processor, memories, a descrambler and a decoder configured to produce a decoded sequence of media content, said sequence comprising a succession of media frames, the method comprising steps of:
selecting, by the decoder, at least two decoded consecutive media frames, including a preceding media frame and at least one immediately following media frame, from the decoded sequence of media content according to a predefined information code previously stored in a configuration setting memory of the receiver device, the information code comprising instructions and parameters indicating a type of transition effect, locations where to insert transition effects either by time stamps relative to a reference time or by a number of frames after an initial frame; inserting, by a marking module, a transition effect between the at least two selected decoded consecutive media frames the transition effect being retrieved from a library of transition effects stored in a memory associated to the marking module and applied on the basis of the preceding media frame and the at least one immediately following media frame; assigning a secret symbol to the inserted transition effect, the secret symbol being formed by a bit string associated to all or part of a unique identifier specific to the receiver device; and outputting a modified decoded sequence of media content comprising at least one transition effect between the at least two previously selected consecutive media frames. |
