Amplitude Scale Estimation for Quantization-Based Watermarking
نویسندگان
چکیده
منابع مشابه
Statistical amplitude scale estimation for quantization-based watermarking
Quantization-based watermarking schemes are vulnerable to amplitude scaling. Therefore the scaling factor has to be accounted for either at the encoder, or at the decoder, prior to watermark decoding. In this paper we derive the marginal probability density model for the watermarked and attacked data, when the attack channel consists of amplitude scaling followed by additive noise. The encoder ...
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Watermarking is the process of imperceptibly embedding a message (watermark) into a host signal (audio, video). The resulting signal is called a watermarked signal. The message should introduce only tolerable distortion to the host signal and it should be recoverable by the intended receiver after signal processing operations on the watermarked data. Watermarking schemes based on quantization t...
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Quantization-based watermarking schemes comprise a class of watermarking schemes that achieves the channel capacity in terms of additive noise attacks. The existence of good high dimensional lattices that can be efficiently implemented and incorporated into watermarking structures, made quantization-based watermarking schemes of practical interest. Because of the structure of the lattices, wate...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 2006
ISSN: 1053-587X
DOI: 10.1109/tsp.2006.881216