| 摘要 |
<p>An information insertion/detection system for detecting and inserting DCT coefficients in image signals includes a resolution analyzer for receiving image code data and outputting the image code data and image size information of the image code data, an insertion pattern determining unit for receiving the image code data and the image size information and outputting the image code data and pattern information, an information inserter for receiving the image code data and the pattern information and producing image code data by inserting information of the DCT coefficients into the image code data and a video analyzer for receiving the image code data and producing information of insertion strength of the DCT coefficients. The information is inserted in DCT coefficients so that the information can be detected by referring to an image size of MPEG data inputted to the system when the image data is converted into a reference image size. <IMAGE></p> |
