US 9,959,906 B2Granted

Method and a receiver device configured to mark digital media content

AssigneeNagravision S.A.

InventorMinh Son Tran

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Abstract

A method and a receiver device configured to mark a media content sequence comprising a succession of media frames. A decoder included in the receiver device selects at least two decoded consecutive media frames from the media content sequence according to a predefined information code previously stored in a configuration setting memory of the receiver device. A marking module associated to the decoder inserts a transition effect between the at least two selected decoded consecutive media frames including a preceding media frame and at least one immediately following media frame. The transition effect is 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. The inserted transition effect is then assigned to a secrete symbol associated to all or part of a unique identifier specific to the receiver device which outputs thus a modified sequence of media content comprising at least one transition effect between the at least two selected consecutive media frames.

Claims14

Dependent claims

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, at least one memory, a descrambler, and a decoder producing a clear 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 from the clear 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, and the at least two decoded consecutive media frames including a preceding media frame and at least one immediately following media frame;
inserting, by a marking circuit, a first mark between the preceding media frame and the at least one immediately following media frame, the first mark comprising a transition effect being retrieved from a library of transition effects stored in a memory associated to the marking circuit and applied on the basis of the preceding media frame and the at least one immediately following media frame;
inserting, by the marking circuit, a second mark between two consecutive media frames, the second mark preceding the at least two decoded media frames, the second mark comprising a secret information symbol indicating an absence or presence of the first mark between the at least two decoded consecutive media frames;
assigning a secret symbol to the first mark, 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 clear sequence of media content comprising the first mark between the at least two decoded consecutive media frames and the second mark.

3 more elements

A receiver device configured to mark a media content sequence in a digital data stream, the receiver device comprising:

at least one processor;
at least one memory;
a descrambler;
a decoder configured to:
produce a clear sequence of media content, said sequence comprising a succession of media frames;
select at least two decoded consecutive media frames from the clear media content sequence 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 of the transition effects either in form of time stamps relative to a reference time or in form of a number of frames after an initial frame, and the at least two decoded consecutive media frames including a preceding media frame and at least one immediately following media frame;
and
a marking circuit configured to:
insert a first mark between the preceding media frame and the at least one immediately following media frame, the first mark comprising a transition effect being retrieved from a library of transition effects stored in a memory of the marking circuit;
insert a second mark between two consecutive media frames, the second mark preceding the at least two decoded media frames, the second mark comprising a secret information symbol indicating an absence or presence of the first mark between the at least two decoded consecutive media frames;
assign a secret symbol to the first mark, the secret symbol being formed by a bit string associated to all or part of a unique identifier specific to the receiver device;
and
output a modified clear sequence of media content comprising the first mark between the at least two decoded consecutive media frames and the second mark.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/613,763Filed 4 Feb 2015
Priority: EP 141539045 Feb 2014
Published: US 2015/0221340 A16 Aug 2015
Granted: 1 May 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G11B 27/034
Electronic editing of digitised analogue information signals, e.g. audio or video signals: on discs
G06T 1/005
Image watermarking: robust watermarking, e.g. average attack or collusion attack resistant
G06T 1/0085
Image watermarking: time domain based watermarking, e.g. watermarks spread over several images
G11B 27/34
Indexing; Addressing; Timing or synchronising; Measuring tape travel: indicating arrangements