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Spread spectrum (SS) is one of the most commonly used watermarking techniques, but it suffers from host signal interference during watermark extraction. Besides the well-known developments of classical host interference rejecting SS techniques, i.e., improved spread spectrum (ISS) and correlation-aware improved spread spectrum (CAISS), a simple and effective treatment could be splitting the host signal...
We present a novel multimedia data hiding system using over-complete transform dictionaries. The proposed design scheme is different from most existing schemes that use orthonormal (complete) dictionaries, e.g., discrete Fourier transform (DFT), discrete cosine transform (DCT), or discrete wavelet transform (DWT) matrices, etc., during data embedding and detection phases. This paper focuses on one...
Prime factor fast algorithms are computationally efficient for various discrete transforms. However, they generally need an index mapping process to convert one-dimensional input sequence into a two-dimensional array, which results in a substantially computational overhead and an irregular computational structure. This letter attempts to minimize the computation overhead by a simple and general mapping...
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