| 摘要 |
FIELD: information technologies. ^ SUBSTANCE: invention consists in updating digital water marks by a supplier of audio-visual information and detection of updated water marks by a user equipment, in which the water mark is recorded into information using the first diagram of water mark noise distribution, updating is carried out by distribution of the second diagram of water mark noise distribution by an information supplier to user equipment, using a technology of coding of a signal transmitted for recording and detection of a water mark in audio-visual information. ^ EFFECT: increased resistance to unauthorised use of digital information. ^ 9 cl, 4 dwg |
