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Audio-signal watermarking in 3-D space based on virtual-optics

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This paper presents a new approach for audio-signal watermarking in three-dimensional (3-D) space. The method proposed in this paper offers an efficient way of copyright protection of audio signal through a virtual-optical-imaging scheme (VOIS). The watermarking method presented here does not require the use of original signal for watermark detection. Besides, this scheme is of a high-strength security system with multiple locks and multiple keys. The embedding strategy of a watermark with a methodology of the VOIS is analyzed in detail under the framework of Fourier optics. The embedded watermark is robust to normal signal manipulations. Numerical simulation results show a good agreement with theoretical prediction.

Document Type: Research Article


Affiliations: 1: Institute of Optoelectronics, Shenzhen University and Key Laboratory of Optoelectronics Devices and Systems, 518060 Shenzhen, Guangdong Province, China 2: College of Precision Instrumentation and Optoelectronics Engineering, Tianjin University, 300072 Tianjin, China

Publication date: February 1, 2004


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