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Watermark embedding and extracting method for protecting digital audio contents copyright and preventing duplication and apparatus using thereof
Watermark embedding and extracting method for protecting digital audio contents copyright and preventing duplication and apparatus using thereof
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机译:用于保护数字音频内容版权并防止重复的水印嵌入和提取方法及其装置
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摘要
In embedding a watermark in a digital audio contents, a model using a minimum audible limit of the digital audio contents is generated and a series of pseudo random number is masked to generate the watermark to be inserted in the digital audio contents In order to extract the watermark embedded in the digital audio contents, an auditory psychological model having a minimum audible limit, which depends on the characteristic of frequency generated from the digital audio contents, is formed to generate the watermark from a series of pseudo random number. After generating the watermark, the length of the watermark is adjusted according to the relationship of a signal processing between the adjacent digital audio contents. By measuring the correlation between the watermark and digital audio contents, it is possible to detect whether the watermark is inserted or not.
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