FIELD: data processing.
SUBSTANCE: invention relates to means of generating, encoding and decoding a watermark. Watermark generator, which generates an electronic watermark signal based on binary message data, including in its structure an information spreader configured to spread an information unit to a plurality of time-frequency-domain values, to obtain a spread information representation. Watermark generator also includes a synchronization inserter configured to multiplicatively combine spread information representation with a synchronization spread sequence to obtain a combined information-synchronization representation. Watermark generator also includes watermark signal provider configured to provide watermark signal on basis of combined information-synchronization representation. Also described are a watermark decoder, methods and computer program.
EFFECT: technical result consists in ensuring reliable synchronisation when transmitting watermark.
19 cl, 41 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WATERMARK SIGNAL GENERATION AND EMBEDDING WATERMARK | 2011 |
|
RU2624549C2 |
| WATERMARK GENERATOR, WATERMARK DECODER, METHOD OF GENERATING WATERMARK SIGNAL BASED ON BINARY MESSAGE DATA, METHOD OF GENERATING BINARY MESSAGE DATA BASED ON A SIGNAL WITH WATERMARK AND COMPUTER PROGRAM USING DIFFERENTIAL CODING | 2011 |
|
RU2586844C2 |
| WATER MARK GENERATOR, WATER MARK DECODER, METHOD OF WATER MARK SIGNAL GENERATION BASED ON DATA OF BINARY MESSAGE, METHOD FOR FORMING DATA OF BINARY MESSAGE BASED ON SIGNAL WITH WATER MARK AND COMPUTER PROGRAM USING TWO-DIMENSIONAL BIT EXPANSION | 2011 |
|
RU2666647C2 |
| WATERMARK DECODER AND METHOD OF GENERATING BINARY MESSAGE DATA | 2011 |
|
RU2586845C2 |
| EVALUATING DIRECTION OF ARRIVAL OF SIGNAL USING WATERMARKED AUDIO SIGNALS AND ARRAY OF MICROPHONES | 2012 |
|
RU2575535C2 |
| DEVICE FOR WATERMARK IMPLANTATION IN DATA REPRESENTATION, WATERMARK DETECTOR, METHOD AND COMPUTER PROGRAM AND INFO SIGNAL | 2009 |
|
RU2510937C2 |
| APPARATUS FOR EMBEDDING WATERMARK INTO INFORMATION REPRESENTATION, DETECTOR FOR DETECTING WATERMARK IN INFORMATION REPRESENTATION, METHOD AND COMPUTER PROGRAM | 2009 |
|
RU2510078C2 |
| DEVICE FOR CREATING WATERMARKS, DEVICE FOR DECODING WATERMARKS, METHOD OF PROVIDING WATERMARKED SIGNAL BASED ON DATA CONTAINING DISCRETE VALUES, AND METHOD OF PROVIDING DATA CONTAINING DISCRETE VALUES, DEPENDING ON WATERMARKED SIGNAL | 2011 |
|
RU2586877C2 |
| WATERMARK EMBEDDING | 2005 |
|
RU2376708C2 |
| METHOD FOR INCORPORATION OF DIGITAL WATERMARK INTO WANTED SIGNAL | 2006 |
|
RU2405218C2 |
