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

摘要

FIELD: communication.SUBSTANCE: invention relates to a communication system and is designed for making watermarks to provide signal with watermark based on data containing discrete values. Device comprises differential encoding device configured to use alternating phase to the current value of stream flow values or to the current watermark symbol, the current watermark symbol corresponds to current stream value of stream values to obtain current watermark ratio of the watermark signal. Differential encoding device is configured to extract phase of previous spectral signal coefficient with watermark, which is a combination of the main signal and watermark, also made with additional possibility to provide signal watermark, such that the phase angle of phase interlacing applied to the current stream value or to the current symbol watermark depends on the phase of the previous spectral signal coefficient with watermark.EFFECT: technical result is increased stability of watermark signal.15 cl, 16 dwg