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OwnerSeung Wook Lee, Jin Ho Kim +2inventors
InventorsSeung Wook Lee, Jin Ho Kim, Won Young Yoo, Young Ho Suh
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The present invention relates to a protection of copyrights of digital data, and more particularly, to a real-time blind watermarking method using quantization, in which a watermark information for representing ownership is embedded in a digital image, video or the like so as not to be visually or aurally discriminated and is extracted after various attacks such as edit or the like, and which can be used in all compression ways. The real-time video watermarking system is a blind method and is simple. In order to perform DCT with respect to an original frame and enhance the robustness, the watermark is embedded in a low frequency component. Further, since the DCT is not performed with respect to all blocks, the invention has a rapid operation speed regardless of the size of the video frame. Furthermore, in extracting the embedded watermark and confirming the extracted watermark, the interference phenomenon between the host signal and the watermark signal is removed to thereby enhance the extracting performance. Moreover, since the watermark is embedded and extracted not in the compression stream but in non-compressed row frame, the invention can be used in all compression ways, i.e., has a very wide usage range.
A real-time blind watermarking method using a quantization in embedding a watermark for protecting a copyright of a digital data including an image or a video, the method comprising the steps of:
A real-time blind watermarking method using a quantization in extracting a watermark from a digital data including an image in which a digital watermark is embedded, the method comprising the steps of
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