Title :
Informed audio watermarking scheme using digital chaotic signals
Author :
Silvestre, G.C.M. ; Hurley, N.J. ; Hanau, G.S. ; Dowling, W.J.
Author_Institution :
Nat. Univ. of Ireland, Dublin, Ireland
Abstract :
An informed audio watermarking scheme using chaotic waveforms is proposed. The watermark consists of an attenuated signal embedded in the original audio signal. A modulation scheme based on vector quantization is used to achieve blind detection of the watermark signal. A method for self-synchronization of the watermark detector is proposed using chaotic orthogonal waveforms. A perceptual model is employed to ensure inaudibility of the embedded signal that is shaped to the spectrum of the host signal. High robustness to external noise is achieved by spreading the watermark data over a period of time. The robustness of the scheme is assessed by computer simulations
Keywords :
audio coding; chaos; copy protection; signal detection; synchronisation; vector quantisation; audio coding; audio signal; blind signal detection; chaotic orthogonal waveforms; digital chaotic signals; embedded attenuated signal; informed audio watermarking; perceptual model; vector quantization modulation scheme; watermark detector; Channel capacity; Chaos; Detectors; Digital modulation; Humans; Noise robustness; Signal generators; Signal processing algorithms; Vector quantization; Watermarking;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.941181
