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Digital multimedia is ubiquitous today. Multimedia is easily reproduced and modified without any trace of manipulations. In most cases, a human will not be able to judge whether a multimedia signal is authentic by perceptual inspection. In this article we provide a compact yet fairly comprehensive introduction of multimedia authentication (MA) to the general signal processing audience. The article gives a brief discussion on the different MA technologies such as hard authentication, soft authentication, quality-based authentication, content-based authentication, block authentication, and lossless watermarking.
Zhu et al. (Mon,) studied this question.
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