| 摘要 |
PROBLEM TO BE SOLVED: To prevent illicit copy by outputting image data, to which a mark set in advance is added, by applying that mark to the image data of transmission format, to which compressing processing is performed, inputted from the outside. SOLUTION: An image signal is inputted to an interface circuit 1. The input signal is converted to MPEG2-TS and inputted to a transport layer demultiplexer 2. In this case, the information of MPEG2-TS is converted to the information of MPEG-PS and when the information is descrambled, descrambling is canceled by the information of descrambler 3. The information of MPEG-PS is converted to RGB signals by a decode circuit 4. Based on the information from the descrambler 3, a prescribed mark of each terminal equipment is applied to each of the RGB signals by an image converting circuit 5 and these signals are converted to NTSC signals by a video interface 6 and outputted from a monitor, etc. |
