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 Russian patent published in 2018 - IPC G10L19/18 

FIELD: physics.

SUBSTANCE: water mark generator, water mark generating signal based on binary message data including an information processor that, depending on a single bit of the binary message data, generates 2D expansion information representing the message bit in the form of a set of time-frequency domain values. The water mark generator, including also a water mark signal feeder, emitting a water mark signal based on the information on the two-dimensional expansion. A water mark detector, methods and computer programs are also described.

EFFECT: increase in the reliability of the transfer of the coded water mark.

18 cl, 27 dwg