4 research outputs found
Statistical Digital Watermarks of Audio Signals
Π ΠΎΠ·ΡΠΎΠ±Π»Π΅Π½Ρ Π°Π»Π³ΠΎΡΠΈΡΠΌΠΈ Π²Π±ΡΠ΄ΠΎΠ²ΡΠ²Π°Π½Π½Ρ Ρ Π²ΠΈΡΠ²Π»Π΅Π½Π½Ρ ΡΠΈΡΡΠΎΠ²ΠΈΡ
Π²ΠΎΠ΄ΡΠ½ΠΈΡ
Π·Π½Π°ΠΊΡΠ² Π² Π·Π²ΡΠΊΠΎΠ²Ρ ΡΠΈΠ³Π½Π°Π»ΠΈ Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ Π°Π½Π°Π»ΡΠ·Ρ ΠΊΠΎΠ²Π·Π°ΡΡΠΎΠ³ΠΎ ΡΡΠ΅ΠΉΠΌΠ° Ρ ΡΠ°ΡΡΠΎΡΠ½ΡΠΉ ΠΎΠ±Π»Π°ΡΡΡ. ΠΠ»Π³ΠΎΡΠΈΡΠΌΠΈ Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΡΡΡΡ ΠΌΡΠ½ΡΠΌΡΠ·Π°ΡΡΡ ΡΠΏΠΎΡΠ²ΠΎΡΠ΅Π½Ρ ΡΠΈΠ³Π½Π°Π»Ρ, Π²ΠΈΡΠ²Π»Π΅Π½Π½Ρ Ρ Π΄Π΅ΠΊΠΎΠ΄ΡΠ²Π°Π½Π½Ρ Π¦ΠΠ Π² Π°ΡΠΈΠ½Ρ
ΡΠΎΠ½Π½ΠΎΠΌΡ ΡΠ΅ΠΆΠΈΠΌΡ Π±Π΅Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ ΡΠΊΠΈΡ
-Π½Π΅Π±ΡΠ΄Ρ ΠΌΠ°ΡΠΊΠ΅ΡΡΠ² Ρ ΡΠΈΠ½Ρ
ΡΠΎΡΠΈΠ³Π½Π°Π»ΡΠ². ΠΠ»Ρ Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½Ρ Π·Π°Π²Π°Π΄ΠΎΡΡΡΠΉΠΊΠΎΡΡΡ Π¦ΠΠ Π·Π°ΡΡΠΎΡΠΎΠ²Π°Π½Π° Π²ΡΠ·ΡΠΊΠΎΡΠΌΡΠ³ΠΎΠ²Π° Π±Π°Π³Π°ΡΠΎΠΊΠ°Π½Π°Π»ΡΠ½Π° ΠΏΠ΅ΡΠ΅Π΄Π°ΡΠ° Ρ Π·Π°Π²Π°Π΄ΠΎΡΡΡΠΉΠΊΠ΅ ΠΊΠΎΠ΄ΡΠ²Π°Π½Π½Ρ.Introduction. Digital watermarks (DWM) refer to embedding additional information directly into audio signal for digital right management and automatic identification of radiotelephone transmissions in aeronautical, maritime and military VHF communication. The main part. The designed embedding algorithm is based on evaluation of sliding frame to embed information or no regarding to distortions introduced by DWM. Watermark location is grounded calculation of distances norm between received and maximum likelihood estimated signal vectors in the domain of Discreet Fourier Transform and doesnβt need for any marking and synchronizing measures. Robustness of DWM against quantization, filtering, additive Gaussian noise, digital format conversion is provided by multichannel narrowband DWM transmission and application of BCH (63,30,6) error-correction code. The proposed algorithm demonstrates watermark inaudibility because of preserving signal power before and after data embedding and searching the most suitable frames for DWM positioning.
Conclusion. The proposed algorithms provide advanced compromising solution of audio watermarking process: data payload β inaudibility β robustness. The designed algorithms are applicable both in analog and digital channels for transmission monitoring and digital right management.Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ Π°Π»Π³ΠΎΡΠΈΡΠΌΡ Π²ΡΡΡΠ°ΠΈΠ²Π°Π½ΠΈΡ ΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΡ ΡΠΈΡΡΠΎΠ²ΡΡ
Π²ΠΎΠ΄ΡΠ½ΡΡ
Π·Π½Π°ΠΊΠΎΠ² Π² Π·Π²ΡΠΊΠΎΠ²ΡΠ΅ ΡΠΈΠ³Π½Π°Π»Ρ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠΊΠΎΠ»ΡΠ·ΡΡΠ΅Π³ΠΎ ΡΡΠ΅ΠΉΠΌΠ° Π² ΡΠ°ΡΡΠΎΡΠ½ΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ. ΠΠ»Π³ΠΎΡΠΈΡΠΌΡ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡ ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·Π°ΡΠΈΡ ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΠΉ ΡΠΈΠ³Π½Π°Π»Π°, ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΈΠ΅ ΠΈ Π΄Π΅ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π¦ΠΠ Π² Π°ΡΠΈΠ½Ρ
ΡΠΎΠ½Π½ΠΎΠΌ ΡΠ΅ΠΆΠΈΠΌΠ΅ Π±Π΅Π· ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΊΠ°ΠΊΠΈΡ
-Π»ΠΈΠ±ΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠΎΠ² ΠΈ ΡΠΈΠ½Ρ
ΡΠΎΡΠΈΠ³Π½Π°Π»ΠΎΠ². ΠΠ»Ρ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ ΠΏΠΎΠΌΠ΅Ρ
ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ Π¦ΠΠ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½Π° ΡΠ·ΠΊΠΎΠΏΠΎΠ»ΠΎΡΠ½Π°Ρ ΠΌΠ½ΠΎΠ³ΠΎΠΊΠ°Π½Π°Π»ΡΠ½Π°Ρ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΠ° ΠΈ ΠΏΠΎΠΌΠ΅Ρ
ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ΅ ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅